diff --git a/Changelog.md b/Changelog.md
index a0a8e9049..dac53baf4 100644
--- a/Changelog.md
+++ b/Changelog.md
@@ -6,6 +6,7 @@
 * Sort notifications by last interaction [#7568](https://github.com/diaspora/diaspora/pull/7568)
 * Remove tiff support from photos [#7576](https://github.com/diaspora/diaspora/pull/7576)
 * Remove reference from reshares when original post is deleted [#7578](https://github.com/diaspora/diaspora/pull/7578)
+* Merge migrations from before 0.6.0.0 to CreateSchema [#7580](https://github.com/diaspora/diaspora/pull/7580)
 
 ## Bug fixes
 * Fix displaying polls with long answers [#7579](https://github.com/diaspora/diaspora/pull/7579)
diff --git a/db/migrate/0000_create_schema.rb b/db/migrate/0000_create_schema.rb
index a6393fd40..a151b508d 100644
--- a/db/migrate/0000_create_schema.rb
+++ b/db/migrate/0000_create_schema.rb
@@ -2,8 +2,9 @@ class CreateSchema < ActiveRecord::Migration[4.2]
   # rubocop:disable Metrics/AbcSize, Metrics/MethodLength, Metrics/LineLength, Layout/ExtraSpacing
   def up
     create_table :account_deletions do |t|
-      t.string  :diaspora_handle
-      t.integer :person_id
+      t.string   :diaspora_handle
+      t.integer  :person_id
+      t.datetime :completed_at
     end
 
     create_table :aspect_memberships do |t|
@@ -14,54 +15,103 @@ class CreateSchema < ActiveRecord::Migration[4.2]
     end
 
     add_index :aspect_memberships, %i[aspect_id contact_id], name: :index_aspect_memberships_on_aspect_id_and_contact_id, unique: true
-    add_index :aspect_memberships, [:aspect_id], name: :index_aspect_memberships_on_aspect_id
-    add_index :aspect_memberships, [:contact_id], name: :index_aspect_memberships_on_contact_id
+    add_index :aspect_memberships, :aspect_id, name: :index_aspect_memberships_on_aspect_id
+    add_index :aspect_memberships, :contact_id, name: :index_aspect_memberships_on_contact_id
 
     create_table :aspect_visibilities do |t|
       t.integer  :shareable_id,                    null: false
       t.integer  :aspect_id,                       null: false
-      t.datetime :created_at,                      null: false
-      t.datetime :updated_at,                      null: false
       t.string   :shareable_type, default: "Post", null: false
     end
 
-    add_index :aspect_visibilities, [:aspect_id], name: :index_aspect_visibilities_on_aspect_id
-    add_index :aspect_visibilities, %i[shareable_id shareable_type aspect_id], name: :shareable_and_aspect_id, length: {shareable_type: 189}, using: :btree
-    add_index :aspect_visibilities, %i[shareable_id shareable_type], name: :index_aspect_visibilities_on_shareable_id_and_shareable_type, length: {shareable_type: 190}, using: :btree
+    add_index :aspect_visibilities, :aspect_id, name: :index_aspect_visibilities_on_aspect_id
+    add_index :aspect_visibilities, %i[shareable_id shareable_type aspect_id], name: :shareable_and_aspect_id, length: {shareable_type: 189}
+    add_index :aspect_visibilities, %i[shareable_id shareable_type], name: :index_aspect_visibilities_on_shareable_id_and_shareable_type, length: {shareable_type: 190}
 
     create_table :aspects do |t|
-      t.string   :name,                            null: false
-      t.integer  :user_id,                         null: false
-      t.datetime :created_at,                      null: false
-      t.datetime :updated_at,                      null: false
-      t.boolean  :contacts_visible, default: true, null: false
+      t.string   :name,                             null: false
+      t.integer  :user_id,                          null: false
+      t.datetime :created_at,                       null: false
+      t.datetime :updated_at,                       null: false
+      t.boolean  :contacts_visible, default: true,  null: false
       t.integer  :order_id
+      t.boolean  :chat_enabled,     default: false
     end
 
     add_index :aspects, %i[user_id contacts_visible], name: :index_aspects_on_user_id_and_contacts_visible
-    add_index :aspects, [:user_id], name: :index_aspects_on_user_id
+    add_index :aspects, :user_id, name: :index_aspects_on_user_id
+
+    create_table :authorizations do |t|
+      t.integer  :user_id
+      t.integer  :o_auth_application_id
+      t.string   :refresh_token
+      t.string   :code
+      t.string   :redirect_uri
+      t.string   :nonce
+      t.string   :scopes
+      t.boolean  :code_used,             default: false
+      t.datetime :created_at,                            null: false
+      t.datetime :updated_at,                            null: false
+    end
+
+    add_index :authorizations, :user_id, name: :index_authorizations_on_user_id
+    add_index :authorizations, :o_auth_application_id, name: :index_authorizations_on_o_auth_application_id
 
     create_table :blocks do |t|
       t.integer :user_id
       t.integer :person_id
     end
 
+    create_table :chat_contacts do |t|
+      t.integer :user_id,                  null: false
+      ## JID <= 3071 bytes http://tools.ietf.org/html/rfc6122
+      t.string  :jid,                      null: false
+      t.string  :name,         limit: 255, null: true
+      t.string  :ask,          limit: 128, null: true
+      t.string  :subscription, limit: 128, null: false
+    end
+
+    add_index :chat_contacts, %i[user_id jid], name: :index_chat_contacts_on_user_id_and_jid, length: {jid: 190}, unique: true
+
+    create_table :chat_fragments do |t|
+      t.integer :user_id,               null: false
+      t.string  :root,      limit: 256, null: false
+      t.string  :namespace, limit: 256, null: false
+      t.text    :xml,                   null: false
+    end
+
+    add_index :chat_fragments, :user_id, name: :index_chat_fragments_on_user_id, unique: true
+
+    create_table :chat_offline_messages do |t|
+      t.string   :from,       null: false
+      t.string   :to,         null: false
+      t.text     :message,    null: false
+      t.datetime :created_at, null: false
+    end
+
+    create_table :comment_signatures, id: false do |t|
+      t.integer :comment_id,         null: false
+      t.text    :author_signature,   null: false
+      t.integer :signature_order_id, null: false
+      t.text    :additional_data
+    end
+
+    add_index :comment_signatures, :comment_id, name: :index_comment_signatures_on_comment_id, unique: true
+
     create_table :comments do |t|
       t.text     :text,                                               null: false
       t.integer  :commentable_id,                                     null: false
       t.integer  :author_id,                                          null: false
       t.string   :guid,                                               null: false
-      t.text     :author_signature
-      t.text     :parent_author_signature
       t.datetime :created_at,                                         null: false
       t.datetime :updated_at,                                         null: false
       t.integer  :likes_count,                       default: 0,      null: false
       t.string   :commentable_type,       limit: 60, default: "Post", null: false
     end
 
-    add_index :comments, [:author_id], name: :index_comments_on_person_id
+    add_index :comments, :author_id, name: :index_comments_on_person_id
     add_index :comments, %i[commentable_id commentable_type], name: :index_comments_on_commentable_id_and_commentable_type
-    add_index :comments, [:guid], name: :index_comments_on_guid, length: {guid: 191}, using: :btree, unique: true
+    add_index :comments, :guid, name: :index_comments_on_guid, length: {guid: 191}, unique: true
 
     create_table :contacts do |t|
       t.integer  :user_id,                    null: false
@@ -72,7 +122,7 @@ class CreateSchema < ActiveRecord::Migration[4.2]
       t.boolean  :receiving,  default: false, null: false
     end
 
-    add_index :contacts, [:person_id], name: :index_contacts_on_person_id
+    add_index :contacts, :person_id, name: :index_contacts_on_person_id
     add_index :contacts, %i[user_id person_id], name: :index_contacts_on_user_id_and_person_id, unique: true
 
     create_table :conversation_visibilities do |t|
@@ -84,8 +134,8 @@ class CreateSchema < ActiveRecord::Migration[4.2]
     end
 
     add_index :conversation_visibilities, %i[conversation_id person_id], name: :index_conversation_visibilities_usefully, unique: true
-    add_index :conversation_visibilities, [:conversation_id], name: :index_conversation_visibilities_on_conversation_id
-    add_index :conversation_visibilities, [:person_id], name: :index_conversation_visibilities_on_person_id
+    add_index :conversation_visibilities, :conversation_id, name: :index_conversation_visibilities_on_conversation_id
+    add_index :conversation_visibilities, :person_id, name: :index_conversation_visibilities_on_person_id
 
     create_table :conversations do |t|
       t.string   :subject
@@ -95,7 +145,8 @@ class CreateSchema < ActiveRecord::Migration[4.2]
       t.datetime :updated_at, null: false
     end
 
-    add_index :conversations, [:author_id], name: :conversations_author_id_fk
+    add_index :conversations, :guid, name: :index_conversations_on_guid, length: 191, unique: true
+    add_index :conversations, :author_id, name: :conversations_author_id_fk
 
     create_table :invitation_codes do |t|
       t.string   :token
@@ -105,39 +156,29 @@ class CreateSchema < ActiveRecord::Migration[4.2]
       t.datetime :updated_at, null: false
     end
 
-    create_table :invitations do |t|
-      t.text     :message
-      t.integer  :sender_id
-      t.integer  :recipient_id
-      t.integer  :aspect_id
-      t.datetime :created_at,                   null: false
-      t.datetime :updated_at,                   null: false
-      t.string   :service
-      t.string   :identifier
-      t.boolean  :admin,        default: false
-      t.string   :language,     default: "en"
+    create_table :like_signatures, id: false do |t|
+      t.integer :like_id,            null: false
+      t.text    :author_signature,   null: false
+      t.integer :signature_order_id, null: false
+      t.text    :additional_data
     end
 
-    add_index :invitations, [:aspect_id], name: :index_invitations_on_aspect_id
-    add_index :invitations, [:recipient_id], name: :index_invitations_on_recipient_id
-    add_index :invitations, [:sender_id], name: :index_invitations_on_sender_id
+    add_index :like_signatures, :like_id, name: :index_like_signatures_on_like_id, unique: true
 
     create_table :likes do |t|
       t.boolean  :positive,                           default: true
       t.integer  :target_id
       t.integer  :author_id
       t.string   :guid
-      t.text     :author_signature
-      t.text     :parent_author_signature
       t.datetime :created_at,                                        null: false
       t.datetime :updated_at,                                        null: false
       t.string   :target_type,             limit: 60,                null: false
     end
 
-    add_index :likes, [:author_id], name: :likes_author_id_fk
-    add_index :likes, [:guid], name: :index_likes_on_guid, length: {guid: 191}, using: :btree, unique: true
+    add_index :likes, :author_id, name: :likes_author_id_fk
+    add_index :likes, :guid, name: :index_likes_on_guid, length: {guid: 191}, unique: true
     add_index :likes, %i[target_id author_id target_type], name: :index_likes_on_target_id_and_author_id_and_target_type, unique: true
-    add_index :likes, [:target_id], name: :index_likes_on_post_id
+    add_index :likes, :target_id, name: :index_likes_on_post_id
 
     create_table :locations do |t|
       t.string   :address
@@ -154,8 +195,8 @@ class CreateSchema < ActiveRecord::Migration[4.2]
     end
 
     add_index :mentions, %i[person_id post_id], name: :index_mentions_on_person_id_and_post_id, unique: true
-    add_index :mentions, [:person_id], name: :index_mentions_on_person_id
-    add_index :mentions, [:post_id], name: :index_mentions_on_post_id
+    add_index :mentions, :person_id, name: :index_mentions_on_person_id
+    add_index :mentions, :post_id, name: :index_mentions_on_post_id
 
     create_table :messages do |t|
       t.integer  :conversation_id,         null: false
@@ -165,11 +206,11 @@ class CreateSchema < ActiveRecord::Migration[4.2]
       t.datetime :created_at,              null: false
       t.datetime :updated_at,              null: false
       t.text     :author_signature
-      t.text     :parent_author_signature
     end
 
-    add_index :messages, [:author_id], name: :index_messages_on_author_id
-    add_index :messages, [:conversation_id], name: :messages_conversation_id_fk
+    add_index :messages, :guid, name: :index_messages_on_guid, length: 191, unique: true
+    add_index :messages, :author_id, name: :index_messages_on_author_id
+    add_index :messages, :conversation_id, name: :messages_conversation_id_fk
 
     create_table :notification_actors do |t|
       t.integer  :notification_id
@@ -179,8 +220,8 @@ class CreateSchema < ActiveRecord::Migration[4.2]
     end
 
     add_index :notification_actors, %i[notification_id person_id], name: :index_notification_actors_on_notification_id_and_person_id, unique: true
-    add_index :notification_actors, [:notification_id], name: :index_notification_actors_on_notification_id
-    add_index :notification_actors, [:person_id], name: :index_notification_actors_on_person_id
+    add_index :notification_actors, :notification_id, name: :index_notification_actors_on_notification_id
+    add_index :notification_actors, :person_id, name: :index_notification_actors_on_person_id
 
     create_table :notifications do |t|
       t.string   :target_type
@@ -192,34 +233,78 @@ class CreateSchema < ActiveRecord::Migration[4.2]
       t.string   :type
     end
 
-    add_index :notifications, [:recipient_id], name: :index_notifications_on_recipient_id
-    add_index :notifications, [:target_id], name: :index_notifications_on_target_id
-    add_index :notifications, %i[target_type target_id], name: :index_notifications_on_target_type_and_target_id, length: {target_type: 190}, using: :btree
+    add_index :notifications, :recipient_id, name: :index_notifications_on_recipient_id
+    add_index :notifications, :target_id, name: :index_notifications_on_target_id
+    add_index :notifications, %i[target_type target_id], name: :index_notifications_on_target_type_and_target_id, length: {target_type: 190}
+
+    create_table :o_auth_access_tokens do |t|
+      t.integer  :authorization_id
+      t.string   :token
+      t.datetime :expires_at
+      t.datetime :created_at,                                 null: false
+      t.datetime :updated_at,                                 null: false
+    end
+
+    add_index :o_auth_access_tokens, :authorization_id, name: :index_o_auth_access_tokens_on_authorization_id
+    add_index :o_auth_access_tokens, :token, name: :index_o_auth_access_tokens_on_token, length: {token: 191}, unique: true
+
+    create_table :o_auth_applications do |t|
+      t.integer  :user_id
+      t.string   :client_id
+      t.string   :client_secret
+      t.string   :client_name
+      t.text     :redirect_uris
+      t.string   :response_types
+      t.string   :grant_types
+      t.string   :application_type,           default: "web"
+      t.string   :contacts
+      t.string   :logo_uri
+      t.string   :client_uri
+      t.string   :policy_uri
+      t.string   :tos_uri
+      t.string   :sector_identifier_uri
+      t.string   :token_endpoint_auth_method
+      t.text     :jwks
+      t.string   :jwks_uri
+      t.boolean  :ppid,                       default: false
+      t.datetime :created_at,                                 null: false
+      t.datetime :updated_at,                                 null: false
+    end
+
+    add_index :o_auth_applications, :user_id, name: :index_o_auth_applications_on_user_id
+    add_index :o_auth_applications, :client_id, name: :index_o_auth_applications_on_client_id, length: {client_id: 191}, unique: true
+
+    create_table :open_graph_caches do |t|
+      t.string :title
+      t.string :ob_type
+      t.text   :image
+      t.text   :url
+      t.text   :description
+    end
 
     create_table :o_embed_caches do |t|
       t.string :url,  limit: 1024, null: false
       t.text   :data,              null: false
     end
 
-    add_index :o_embed_caches, [:url], name: :index_o_embed_caches_on_url, length: {url: 191}, using: :btree
+    add_index :o_embed_caches, :url, name: :index_o_embed_caches_on_url, length: {url: 191}
 
     create_table :participations do |t|
       t.string   :guid
       t.integer  :target_id
       t.string   :target_type,             limit: 60, null: false
       t.integer  :author_id
-      t.text     :author_signature
-      t.text     :parent_author_signature
       t.datetime :created_at,                         null: false
       t.datetime :updated_at,                         null: false
+      t.integer  :count,       default: 1,            null: false
     end
 
-    add_index :participations, [:guid], name: :index_participations_on_guid, length: {guid: 191}, using: :btree
-    add_index :participations, %i[target_id target_type author_id], name: :index_participations_on_target_id_and_target_type_and_author_id
+    add_index :participations, :guid, name: :index_participations_on_guid, length: {guid: 191}
+    add_index :participations, :author_id, name: :index_participations_on_author_id
+    add_index :participations, %i[target_id target_type author_id], name: :index_participations_on_target_id_and_target_type_and_author_id, unique: true
 
     create_table :people do |t|
       t.string   :guid,                                  null: false
-      t.text     :url,                                   null: false
       t.string   :diaspora_handle,                       null: false
       t.text     :serialized_public_key,                 null: false
       t.integer  :owner_id
@@ -227,17 +312,16 @@ class CreateSchema < ActiveRecord::Migration[4.2]
       t.datetime :updated_at,                            null: false
       t.boolean  :closed_account,        default: false
       t.integer  :fetch_status,          default: 0
+      t.integer  :pod_id
     end
 
-    add_index :people, [:diaspora_handle], name: :index_people_on_diaspora_handle, unique: true, length: {diaspora_handle: 191}
-    add_index :people, [:guid], name: :index_people_on_guid, length: {guid: 191}, using: :btree, unique: true
-    add_index :people, [:owner_id], name: :index_people_on_owner_id, unique: true
+    add_index :people, :diaspora_handle, name: :index_people_on_diaspora_handle, unique: true, length: {diaspora_handle: 191}
+    add_index :people, :guid, name: :index_people_on_guid, length: {guid: 191}, unique: true
+    add_index :people, :owner_id, name: :index_people_on_owner_id, unique: true
 
     create_table :photos do |t|
-      t.integer  :tmp_old_id
       t.integer  :author_id,                           null: false
       t.boolean  :public,              default: false, null: false
-      t.string   :diaspora_handle
       t.string   :guid,                                null: false
       t.boolean  :pending,             default: false, null: false
       t.text     :text
@@ -254,56 +338,109 @@ class CreateSchema < ActiveRecord::Migration[4.2]
       t.integer  :width
     end
 
-    add_index :photos, [:status_message_guid], name: :index_photos_on_status_message_guid, length: {status_message_guid: 191}, using: :btree
+    add_index :photos, :guid, name: :index_photos_on_guid, length: 191, unique: true
+    add_index :photos, :status_message_guid, name: :index_photos_on_status_message_guid, length: {status_message_guid: 191}
 
     create_table :pods do |t|
       t.string   :host
       t.boolean  :ssl
-      t.datetime :created_at, null: false
-      t.datetime :updated_at, null: false
+      t.datetime :created_at,                              null: false
+      t.datetime :updated_at,                              null: false
+      t.integer  :status,        default: 0
+      t.datetime :checked_at,    default: Time.zone.at(0)
+      t.datetime :offline_since, default: nil
+      t.integer  :response_time, default: -1
+      t.string   :software
+      t.string   :error
+      t.integer  :port
+      t.boolean  :blocked,       default: false
     end
 
+    add_index :pods, :status, name: :index_pods_on_status
+    add_index :pods, :checked_at, name: :index_pods_on_checked_at
+    add_index :pods, :offline_since, name: :index_pods_on_offline_since
+    add_index :pods, %i[host port], name: :index_pods_on_host_and_port, length: {host: 190}, unique: true
+
+    create_table :poll_answers do |t|
+      t.string  :answer,                 null: false
+      t.integer :poll_id,                null: false
+      t.string  :guid
+      t.integer :vote_count, default: 0
+    end
+
+    add_index :poll_answers, :guid, name: :index_poll_answers_on_guid, length: 191, unique: true
+    add_index :poll_answers, :poll_id, name: :index_poll_answers_on_poll_id
+
+    create_table :poll_participation_signatures, id: false do |t|
+      t.integer :poll_participation_id, null: false
+      t.text    :author_signature,       null: false
+      t.integer :signature_order_id,     null: false
+      t.text    :additional_data
+    end
+
+    add_index :poll_participation_signatures, :poll_participation_id, name: :index_poll_participation_signatures_on_poll_participation_id, unique: true
+
+    create_table :poll_participations do |t|
+      t.integer    :poll_answer_id,          null: false
+      t.integer    :author_id,               null: false
+      t.integer    :poll_id,                 null: false
+      t.string     :guid
+      t.timestamps
+    end
+
+    add_index :poll_participations, :guid, name: :index_poll_participations_on_guid, length: 191, unique: true
+    add_index :poll_participations, :poll_id, name: :index_poll_participations_on_poll_id
+
+    create_table :polls do |t|
+      t.string     :question,          null: false
+      t.integer    :status_message_id, null: false
+      t.boolean    :status
+      t.string     :guid
+      t.timestamps
+    end
+
+    add_index :polls, :guid, name: :index_polls_on_guid, length: 191, unique: true
+    add_index :polls, :status_message_id, name: :index_polls_on_status_message_id
+
     create_table :posts do |t|
       t.integer  :author_id,                                        null: false
       t.boolean  :public,                           default: false, null: false
-      t.string   :diaspora_handle
       t.string   :guid,                                             null: false
-      t.boolean  :pending,                          default: false, null: false
       t.string   :type,                  limit: 40,                 null: false
       t.text     :text
-      t.text     :remote_photo_path
-      t.string   :remote_photo_name
-      t.string   :random_string
-      t.string   :processed_image
       t.datetime :created_at,                                       null: false
       t.datetime :updated_at,                                       null: false
-      t.string   :unprocessed_image
-      t.string   :object_url
-      t.string   :image_url
-      t.integer  :image_height
-      t.integer  :image_width
       t.string   :provider_display_name
-      t.string   :actor_url
-      t.string   :objectId
-      t.string   :root_guid,             limit: 30
-      t.string   :status_message_guid
+      t.string   :root_guid
       t.integer  :likes_count,                      default: 0
       t.integer  :comments_count,                   default: 0
       t.integer  :o_embed_cache_id
       t.integer  :reshares_count,                   default: 0
       t.datetime :interacted_at
-      t.string   :frame_name
-      t.boolean  :favorite,                         default: false
+      t.string   :facebook_id
+      t.string   :tweet_id
+      t.integer  :open_graph_cache_id
+      t.text     :tumblr_ids
     end
 
-    add_index :posts, %i[author_id root_guid], name: :index_posts_on_author_id_and_root_guid, length: {root_guid: 30}, using: :btree, unique: true
-    add_index :posts, [:author_id], name: :index_posts_on_person_id
-    add_index :posts, [:guid], name: :index_posts_on_guid, length: {guid: 191}, using: :btree, unique: true
+    add_index :posts, %i[id type], name: :index_posts_on_id_and_type
+    add_index :posts, %i[author_id root_guid], name: :index_posts_on_author_id_and_root_guid, length: {root_guid: 190}, unique: true
+    add_index :posts, :author_id, name: :index_posts_on_person_id
+    add_index :posts, :guid, name: :index_posts_on_guid, length: {guid: 191}, unique: true
     add_index :posts, %i[id type created_at], name: :index_posts_on_id_and_type_and_created_at
-    add_index :posts, [:root_guid], name: :index_posts_on_root_guid, length: {root_guid: 30}
-    add_index :posts, %i[status_message_guid pending], name: :index_posts_on_status_message_guid_and_pending, length: {status_message_guid: 190}, using: :btree
-    add_index :posts, [:status_message_guid], name: :index_posts_on_status_message_guid, length: {status_message_guid: 191}, using: :btree
-    add_index :posts, %i[type pending id], name: :index_posts_on_type_and_pending_and_id
+    add_index :posts, :root_guid, name: :index_posts_on_root_guid, length: {root_guid: 191}
+    add_index :posts, :tweet_id, name: :index_posts_on_tweet_id, length: {tweet_id: 191}
+
+    create_table :ppid do |t|
+      t.integer :o_auth_application_id
+      t.integer :user_id
+      t.string :guid,       limit: 32
+      t.string :string,     limit: 32
+      t.string :identifier
+    end
+
+    add_index :ppid, :o_auth_application_id, name: :index_ppid_on_o_auth_application_id
+    add_index :ppid, :user_id, name: :index_ppid_on_user_id
 
     create_table :profiles do |t|
       t.string   :diaspora_handle
@@ -322,11 +459,12 @@ class CreateSchema < ActiveRecord::Migration[4.2]
       t.string   :location
       t.string   :full_name,        limit: 70
       t.boolean  :nsfw,                         default: false
+      t.boolean  :public_details,               default: false
     end
 
     add_index :profiles, %i[full_name searchable], name: :index_profiles_on_full_name_and_searchable
-    add_index :profiles, [:full_name], name: :index_profiles_on_full_name
-    add_index :profiles, [:person_id], name: :index_profiles_on_person_id
+    add_index :profiles, :full_name, name: :index_profiles_on_full_name
+    add_index :profiles, :person_id, name: :index_profiles_on_person_id
 
     create_table :rails_admin_histories do |t|
       t.text     :message
@@ -341,6 +479,17 @@ class CreateSchema < ActiveRecord::Migration[4.2]
 
     add_index :rails_admin_histories, %i[item table month year], name: :index_rails_admin_histories, length: {table: 188}
 
+    create_table :reports do |t|
+      t.integer :item_id,                   null: false
+      t.string  :item_type,                 null: false
+      t.boolean :reviewed, default: false
+      t.text    :text
+      t.timestamps
+      t.integer :user_id,                   null: false
+    end
+
+    add_index :reports, :item_id, name: :index_reports_on_item_id
+
     create_table :roles do |t|
       t.integer  :person_id
       t.string   :name
@@ -359,22 +508,34 @@ class CreateSchema < ActiveRecord::Migration[4.2]
       t.datetime :updated_at,                null: false
     end
 
-    add_index :services, %i[type uid], name: :index_services_on_type_and_uid, length: {type: 64, uid: 127}, using: :btree
-    add_index :services, [:user_id], name: :index_services_on_user_id
+    add_index :services, %i[type uid], name: :index_services_on_type_and_uid, length: {type: 64, uid: 127}
+    add_index :services, :user_id, name: :index_services_on_user_id
 
     create_table :share_visibilities do |t|
       t.integer  :shareable_id,                               null: false
-      t.datetime :created_at,                                 null: false
-      t.datetime :updated_at,                                 null: false
       t.boolean  :hidden,                    default: false,  null: false
-      t.integer  :contact_id,                                 null: false
       t.string   :shareable_type, limit: 60, default: "Post", null: false
+      t.integer  :user_id,                                    null: false
     end
 
-    add_index :share_visibilities, [:contact_id], name: :index_post_visibilities_on_contact_id
-    add_index :share_visibilities, %i[shareable_id shareable_type contact_id], name: :shareable_and_contact_id
-    add_index :share_visibilities, %i[shareable_id shareable_type hidden contact_id], name: :shareable_and_hidden_and_contact_id
-    add_index :share_visibilities, [:shareable_id], name: :index_post_visibilities_on_post_id
+    add_index :share_visibilities, :user_id, name: :index_share_visibilities_on_user_id
+    add_index :share_visibilities, %i[shareable_id shareable_type user_id], name: :shareable_and_user_id
+    add_index :share_visibilities, %i[shareable_id shareable_type hidden user_id], name: :shareable_and_hidden_and_user_id
+    add_index :share_visibilities, :shareable_id, name: :index_post_visibilities_on_post_id
+
+    create_table :signature_orders do |t|
+      t.string :order, null: false
+    end
+
+    add_index :signature_orders, :order, name: :index_signature_orders_on_order, length: 191, unique: true
+
+    create_table :simple_captcha_data do |t|
+      t.string     :key,   limit: 40
+      t.string     :value, limit: 12
+      t.timestamps
+    end
+
+    add_index :simple_captcha_data, :key, name: :idx_key
 
     create_table :tag_followings do |t|
       t.integer  :tag_id,     null: false
@@ -384,8 +545,8 @@ class CreateSchema < ActiveRecord::Migration[4.2]
     end
 
     add_index :tag_followings, %i[tag_id user_id], name: :index_tag_followings_on_tag_id_and_user_id, unique: true
-    add_index :tag_followings, [:tag_id], name: :index_tag_followings_on_tag_id
-    add_index :tag_followings, [:user_id], name: :index_tag_followings_on_user_id
+    add_index :tag_followings, :tag_id, name: :index_tag_followings_on_tag_id
+    add_index :tag_followings, :user_id, name: :index_tag_followings_on_user_id
 
     create_table :taggings do |t|
       t.integer  :tag_id
@@ -397,16 +558,17 @@ class CreateSchema < ActiveRecord::Migration[4.2]
       t.datetime :created_at
     end
 
-    add_index :taggings, [:created_at], name: :index_taggings_on_created_at
-    add_index :taggings, [:tag_id], name: :index_taggings_on_tag_id
-    add_index :taggings, %i[taggable_id taggable_type context], name: :index_taggings_on_taggable_id_and_taggable_type_and_context, length: {taggable_type: 95, context: 95}, using: :btree
+    add_index :taggings, :created_at, name: :index_taggings_on_created_at
+    add_index :taggings, :tag_id, name: :index_taggings_on_tag_id
+    add_index :taggings, %i[taggable_id taggable_type context], name: :index_taggings_on_taggable_id_and_taggable_type_and_context, length: {taggable_type: 95, context: 95}
     add_index :taggings, %i[taggable_id taggable_type tag_id], name: :index_taggings_uniquely, unique: true
 
     create_table :tags do |t|
-      t.string :name
+      t.string  :name
+      t.integer :taggings_count, default: 0
     end
 
-    add_index :tags, [:name], name: :index_tags_on_name, unique: true, length: {name: 191}
+    add_index :tags, :name, name: :index_tags_on_name, unique: true, length: {name: 191}
 
     create_table :user_preferences do |t|
       t.string   :email_type
@@ -416,15 +578,13 @@ class CreateSchema < ActiveRecord::Migration[4.2]
     end
 
     create_table :users do |t|
-      t.string   :username
+      t.string   :username,                                                       null: false
       t.text     :serialized_private_key
       t.boolean  :getting_started,                                default: true,  null: false
       t.boolean  :disable_mail,                                   default: false, null: false
       t.string   :language
       t.string   :email,                                          default: "",    null: false
       t.string   :encrypted_password,                             default: "",    null: false
-      t.string   :invitation_token,                   limit: 60
-      t.datetime :invitation_sent_at
       t.string   :reset_password_token
       t.datetime :remember_created_at
       t.integer  :sign_in_count,                                  default: 0
@@ -434,11 +594,7 @@ class CreateSchema < ActiveRecord::Migration[4.2]
       t.string   :last_sign_in_ip
       t.datetime :created_at,                                                     null: false
       t.datetime :updated_at,                                                     null: false
-      t.string   :invitation_service,                 limit: 127
-      t.string   :invitation_identifier,              limit: 127
-      t.integer  :invitation_limit
       t.integer  :invited_by_id
-      t.string   :invited_by_type
       t.string   :authentication_token,               limit: 30
       t.string   :unconfirmed_email
       t.string   :confirm_email_token,                limit: 30
@@ -448,19 +604,33 @@ class CreateSchema < ActiveRecord::Migration[4.2]
       t.integer  :auto_follow_back_aspect_id
       t.text     :hidden_shareables
       t.datetime :reset_password_sent_at
+      t.datetime :last_seen
+      t.datetime :remove_after
+      t.string   :export
+      t.datetime :exported_at
+      t.boolean  :exporting,                                      default: false
+      t.boolean  :strip_exif,                                     default: true
+      t.string   :exported_photos_file
+      t.datetime :exported_photos_at
+      t.boolean  :exporting_photos,                               default: false
+      t.string   :color_theme
     end
 
-    add_index :users, [:authentication_token], name: :index_users_on_authentication_token, unique: true
-    add_index :users, [:email], name: :index_users_on_email, length: {email: 191}
-    add_index :users, %i[invitation_service invitation_identifier], name: :index_users_on_invitation_service_and_invitation_identifier, length: {invitation_service: 64, invitation_identifier: 127}, using: :btree, unique: true
-    add_index :users, [:invitation_token], name: :index_users_on_invitation_token
-    add_index :users, [:username], name: :index_users_on_username, length: {username: 191}, using: :btree, unique: true
+    add_index :users, :authentication_token, name: :index_users_on_authentication_token, unique: true
+    add_index :users, :username, name: :index_users_on_username, length: {username: 191}, unique: true
+    add_index :users, :email, name: :index_users_on_email, length: {email: 191}, unique: true
 
     add_foreign_key :aspect_memberships, :aspects, name: :aspect_memberships_aspect_id_fk, on_delete: :cascade
     add_foreign_key :aspect_memberships, :contacts, name: :aspect_memberships_contact_id_fk, on_delete: :cascade
 
     add_foreign_key :aspect_visibilities, :aspects, name: :aspect_visibilities_aspect_id_fk, on_delete: :cascade
 
+    add_foreign_key :authorizations, :users
+    add_foreign_key :authorizations, :o_auth_applications
+
+    add_foreign_key :comment_signatures, :comments, name: :comment_signatures_comment_id_fk, on_delete: :cascade
+    add_foreign_key :comment_signatures, :signature_orders, name: :comment_signatures_signature_orders_id_fk
+
     add_foreign_key :comments, :people, name: :comments_author_id_fk, column: :author_id, on_delete: :cascade
 
     add_foreign_key :contacts, :people, name: :contacts_person_id_fk, on_delete: :cascade
@@ -470,8 +640,8 @@ class CreateSchema < ActiveRecord::Migration[4.2]
 
     add_foreign_key :conversations, :people, name: :conversations_author_id_fk, column: :author_id, on_delete: :cascade
 
-    add_foreign_key :invitations, :users, name: :invitations_recipient_id_fk, column: :recipient_id, on_delete: :cascade
-    add_foreign_key :invitations, :users, name: :invitations_sender_id_fk, column: :sender_id, on_delete: :cascade
+    add_foreign_key :like_signatures, :likes, name: :like_signatures_like_id_fk, on_delete: :cascade
+    add_foreign_key :like_signatures, :signature_orders, name: :like_signatures_signature_orders_id_fk
 
     add_foreign_key :likes, :people, name: :likes_author_id_fk, column: :author_id, on_delete: :cascade
 
@@ -480,13 +650,25 @@ class CreateSchema < ActiveRecord::Migration[4.2]
 
     add_foreign_key :notification_actors, :notifications, name: :notification_actors_notification_id_fk, on_delete: :cascade
 
+    add_foreign_key :o_auth_access_tokens, :authorizations
+
+    add_foreign_key :o_auth_applications, :users
+
+    add_foreign_key :people, :pods, name: :people_pod_id_fk, on_delete: :cascade
+
+    add_foreign_key :poll_participation_signatures, :poll_participations, name: :poll_participation_signatures_poll_participation_id_fk, on_delete: :cascade
+    add_foreign_key :poll_participation_signatures, :signature_orders, name: :poll_participation_signatures_signature_orders_id_fk
+
     add_foreign_key :posts, :people, name: :posts_author_id_fk, column: :author_id, on_delete: :cascade
 
+    add_foreign_key :ppid, :o_auth_applications
+    add_foreign_key :ppid, :users
+
     add_foreign_key :profiles, :people, name: :profiles_person_id_fk, on_delete: :cascade
 
     add_foreign_key :services, :users, name: :services_user_id_fk, on_delete: :cascade
 
-    add_foreign_key :share_visibilities, :contacts, name: :post_visibilities_contact_id_fk, on_delete: :cascade
+    add_foreign_key :share_visibilities, :users, name: :share_visibilities_user_id_fk, on_delete: :cascade
   end
   # rubocop:enable Metrics/AbcSize, Metrics/MethodLength, Metrics/LineLength, Layout/ExtraSpacing
 end
diff --git a/db/migrate/20130207231310_add_facebook_id_to_post.rb b/db/migrate/20130207231310_add_facebook_id_to_post.rb
deleted file mode 100644
index f559f46a7..000000000
--- a/db/migrate/20130207231310_add_facebook_id_to_post.rb
+++ /dev/null
@@ -1,5 +0,0 @@
-class AddFacebookIdToPost < ActiveRecord::Migration[4.2]
-  def change
-    add_column :posts, :facebook_id, :string
-  end
-end
diff --git a/db/migrate/20130404211624_fix_default_image_url_from_profile.rb b/db/migrate/20130404211624_fix_default_image_url_from_profile.rb
deleted file mode 100644
index 80618b8a5..000000000
--- a/db/migrate/20130404211624_fix_default_image_url_from_profile.rb
+++ /dev/null
@@ -1,9 +0,0 @@
-class FixDefaultImageUrlFromProfile < ActiveRecord::Migration[4.2]
-  def up
-    execute("UPDATE profiles SET image_url = REPLACE(image_url, 'images', 'assets'), image_url_small = REPLACE(image_url_small, 'images', 'assets'), image_url_medium = REPLACE(image_url_medium, 'images', 'assets') WHERE image_url LIKE '%images/user/default.png';")
-  end
-
-  def down
-    execute("UPDATE profiles SET image_url = REPLACE(image_url, 'assets', 'images'), image_url_small = REPLACE(image_url_small, 'assets', 'images'), image_url_medium = REPLACE(image_url_medium, 'assets', 'images') WHERE image_url LIKE '%assets/user/default.png';")
-  end
-end
diff --git a/db/migrate/20130429073928_add_tweet_id_to_post.rb b/db/migrate/20130429073928_add_tweet_id_to_post.rb
deleted file mode 100644
index 7f9c5808f..000000000
--- a/db/migrate/20130429073928_add_tweet_id_to_post.rb
+++ /dev/null
@@ -1,6 +0,0 @@
-class AddTweetIdToPost < ActiveRecord::Migration[4.2]
-  def change
-  	add_column :posts, :tweet_id, :string
-  	add_index :posts, ['tweet_id'], :length => { "tweet_id" => 191 }
-  end
-end
diff --git a/db/migrate/20130608171134_add_open_graph_cache.rb b/db/migrate/20130608171134_add_open_graph_cache.rb
deleted file mode 100644
index ac4826c1f..000000000
--- a/db/migrate/20130608171134_add_open_graph_cache.rb
+++ /dev/null
@@ -1,19 +0,0 @@
-class AddOpenGraphCache < ActiveRecord::Migration[4.2]
-  def up
-    create_table :open_graph_caches do |t|
-      t.string :title
-      t.string :ob_type
-      t.string :image
-      t.string :url
-      t.text :description
-    end
-    change_table :posts do |t|
-      t.integer :open_graph_cache_id
-    end
-  end
-
-  def down
-    remove_column :posts, :open_graph_cache_id
-    drop_table :open_graph_caches
-  end
-end
diff --git a/db/migrate/20130613203350_remove_limit_from_root_guid_in_posts.rb b/db/migrate/20130613203350_remove_limit_from_root_guid_in_posts.rb
deleted file mode 100644
index 2e88f0a1e..000000000
--- a/db/migrate/20130613203350_remove_limit_from_root_guid_in_posts.rb
+++ /dev/null
@@ -1,13 +0,0 @@
-class RemoveLimitFromRootGuidInPosts < ActiveRecord::Migration[4.2]
-  def up
-    remove_index 'posts', :name => 'index_posts_on_root_guid'
-    remove_index 'posts', :name => 'index_posts_on_author_id_and_root_guid'
-    change_column :posts, :root_guid, :string
-    add_index 'posts', ["root_guid"], :name => 'index_posts_on_root_guid', length: {"root_guid"=>191}
-    add_index 'posts', ["author_id", "root_guid"], :name => 'index_posts_on_author_id_and_root_guid', length: {"root_guid"=>190}, :using => :btree, :unique => true
-  end
-
-  def down
-    change_column :posts, :root_guid, :string, limit: 30
-  end
-end
diff --git a/db/migrate/20130717104359_migrate_activity_stream_to_status_message.rb b/db/migrate/20130717104359_migrate_activity_stream_to_status_message.rb
deleted file mode 100644
index c37d8dd3e..000000000
--- a/db/migrate/20130717104359_migrate_activity_stream_to_status_message.rb
+++ /dev/null
@@ -1,13 +0,0 @@
-class MigrateActivityStreamToStatusMessage < ActiveRecord::Migration[4.2]
-  class Post < ApplicationRecord; self.inheritance_column = false; end
-  def up
-    posts_stream_photos = Post.where(type: 'ActivityStreams::Photo')
-    posts_stream_photos.each do |p|
-      p.update_attributes({text: "#{p.text} ![](#{p.image_url})", type: "StatusMessage"}, without_protection: true)
-    end
-  end
-
-  def down
-    raise ActiveRecord::IrreversibleMigration, "Can't recover the deleted ActivityStreams::Photo"
-  end
-end
diff --git a/db/migrate/20130801063213_add_tumblr_post_ids_to_posts.rb b/db/migrate/20130801063213_add_tumblr_post_ids_to_posts.rb
deleted file mode 100644
index 638157388..000000000
--- a/db/migrate/20130801063213_add_tumblr_post_ids_to_posts.rb
+++ /dev/null
@@ -1,5 +0,0 @@
-class AddTumblrPostIdsToPosts < ActiveRecord::Migration[4.2]
-  def change
-    add_column :posts, :tumblr_ids, :text
-  end
-end
diff --git a/db/migrate/20131017093025_create_post_reports.rb b/db/migrate/20131017093025_create_post_reports.rb
deleted file mode 100644
index 5ccceca03..000000000
--- a/db/migrate/20131017093025_create_post_reports.rb
+++ /dev/null
@@ -1,13 +0,0 @@
-class CreatePostReports < ActiveRecord::Migration[4.2]
-  def change
-    create_table :post_reports do |t|
-      t.integer :post_id, :null => false
-      t.string :user_id
-      t.boolean :reviewed, :default => false
-      t.text :text
-
-      t.timestamps
-    end
-    add_index :post_reports, :post_id
-  end
-end
diff --git a/db/migrate/20131213171804_create_simple_captcha_data.rb b/db/migrate/20131213171804_create_simple_captcha_data.rb
deleted file mode 100644
index 9068aec00..000000000
--- a/db/migrate/20131213171804_create_simple_captcha_data.rb
+++ /dev/null
@@ -1,15 +0,0 @@
-class CreateSimpleCaptchaData < ActiveRecord::Migration[4.2]
-  def self.up
-    create_table :simple_captcha_data do |t|
-      t.string :key, :limit => 40
-      t.string :value, :limit => 6
-      t.timestamps
-    end
-    
-    add_index :simple_captcha_data, :key, :name => "idx_key"
-  end
-
-  def self.down
-    drop_table :simple_captcha_data
-  end
-end
diff --git a/db/migrate/20140121132816_add_post_type_to_post_report.rb b/db/migrate/20140121132816_add_post_type_to_post_report.rb
deleted file mode 100644
index 766efb9b9..000000000
--- a/db/migrate/20140121132816_add_post_type_to_post_report.rb
+++ /dev/null
@@ -1,6 +0,0 @@
-class AddPostTypeToPostReport < ActiveRecord::Migration[4.2]
-  def change
-    add_column :post_reports, :post_type, :string, :null => false, :after => :post_id, :default => 'post'
-    change_column_default :post_reports, :post_type, nil
-  end
-end
diff --git a/db/migrate/20140214104217_rename_post_report_to_report.rb b/db/migrate/20140214104217_rename_post_report_to_report.rb
deleted file mode 100644
index 3b02b0aec..000000000
--- a/db/migrate/20140214104217_rename_post_report_to_report.rb
+++ /dev/null
@@ -1,8 +0,0 @@
-class RenamePostReportToReport < ActiveRecord::Migration[4.2]
-  def self.up
-    rename_table :post_reports, :reports
-  end
-  def self.down
-    rename_table :reports, :post_reports
-  end
-end
diff --git a/db/migrate/20140222162826_devise_add_lastseenable_user.rb b/db/migrate/20140222162826_devise_add_lastseenable_user.rb
deleted file mode 100644
index c0a5428d4..000000000
--- a/db/migrate/20140222162826_devise_add_lastseenable_user.rb
+++ /dev/null
@@ -1,12 +0,0 @@
-class DeviseAddLastseenableUser < ActiveRecord::Migration[4.2]
-  def self.up
-    add_column :users, :last_seen, :datetime
-    User.find_each do |user|
-      user.update_column(:last_seen, user.last_sign_in_at)
-    end
-  end
-  
-  def self.down
-    remove_column :users, :last_seen
-  end
-end
\ No newline at end of file
diff --git a/db/migrate/20140308154022_create_polls.rb b/db/migrate/20140308154022_create_polls.rb
deleted file mode 100644
index c9dd794a2..000000000
--- a/db/migrate/20140308154022_create_polls.rb
+++ /dev/null
@@ -1,38 +0,0 @@
-class CreatePolls < ActiveRecord::Migration[4.2]
-  def up
-    create_table :polls do |t|
-      t.string :question, :null => false
-      t.belongs_to :status_message, :null => false
-      t.boolean :status
-      t.string :guid
-      t.timestamps
-    end
-    add_index :polls, :status_message_id
-
-    create_table :poll_answers do |t|
-      t.string :answer, :null => false
-      t.belongs_to :poll, :null => false
-      t.string :guid
-      t.integer :vote_count, :default => 0
-    end
-    add_index :poll_answers, :poll_id
-
-    create_table :poll_participations do |t|
-      t.belongs_to :poll_answer, :null => false
-      t.belongs_to :author, :null => false
-      t.belongs_to :poll, :null => false
-      t.string :guid
-      t.text :author_signature
-      t.text :parent_author_signature
-
-      t.timestamps
-    end
-    add_index :poll_participations, :poll_id
-  end
-
-  def down
-    drop_table :polls
-    drop_table :poll_answers
-    drop_table :poll_participations
-  end
-end
diff --git a/db/migrate/20140422134050_rename_post_columns_to_item.rb b/db/migrate/20140422134050_rename_post_columns_to_item.rb
deleted file mode 100644
index 986326152..000000000
--- a/db/migrate/20140422134050_rename_post_columns_to_item.rb
+++ /dev/null
@@ -1,11 +0,0 @@
-class RenamePostColumnsToItem < ActiveRecord::Migration[4.2]
-  def up
-    rename_column :reports, :post_id, :item_id
-    rename_column :reports, :post_type, :item_type
-  end
-
-  def down
-    rename_column :reports, :item_id, :post_id
-    rename_column :reports, :item_type, :post_type
-  end
-end
diff --git a/db/migrate/20140422134627_change_user_id_type_to_integer.rb b/db/migrate/20140422134627_change_user_id_type_to_integer.rb
deleted file mode 100644
index 019cef962..000000000
--- a/db/migrate/20140422134627_change_user_id_type_to_integer.rb
+++ /dev/null
@@ -1,12 +0,0 @@
-class ChangeUserIdTypeToInteger < ActiveRecord::Migration[4.2]
-  def up
-    remove_column :reports, :user_id
-    add_column :reports, :user_id, :integer, :null => false, :default => 1
-    change_column_default :reports, :user_id, nil
-  end
-
-  def down
-    remove_column :reports, :user_id
-    add_column :reports, :user_id, :string
-  end
-end
diff --git a/db/migrate/20140601102543_add_taggings_counter_cache_to_tags.acts_as_taggable_on_engine.rb b/db/migrate/20140601102543_add_taggings_counter_cache_to_tags.acts_as_taggable_on_engine.rb
deleted file mode 100644
index 5a3f71a25..000000000
--- a/db/migrate/20140601102543_add_taggings_counter_cache_to_tags.acts_as_taggable_on_engine.rb
+++ /dev/null
@@ -1,15 +0,0 @@
-# This migration comes from acts_as_taggable_on_engine (originally 3)
-class AddTaggingsCounterCacheToTags < ActiveRecord::Migration[4.2]
-  def self.up
-    add_column :tags, :taggings_count, :integer, default: 0
-
-    ActsAsTaggableOn::Tag.reset_column_information
-    ActsAsTaggableOn::Tag.find_each do |tag|
-      ActsAsTaggableOn::Tag.reset_counters(tag.id, :taggings)
-    end
-  end
-
-  def self.down
-    remove_column :tags, :taggings_count
-  end
-end
diff --git a/db/migrate/20140801101230_create_chat_contacts.rb b/db/migrate/20140801101230_create_chat_contacts.rb
deleted file mode 100644
index b50afcece..000000000
--- a/db/migrate/20140801101230_create_chat_contacts.rb
+++ /dev/null
@@ -1,17 +0,0 @@
-class CreateChatContacts < ActiveRecord::Migration[4.2]
-  def up
-    create_table :chat_contacts do |t|
-      t.integer :user_id,                  null: false
-      ## JID <= 3071 bytes http://tools.ietf.org/html/rfc6122
-      t.string :jid,                      null: false
-      t.string :name,         limit: 255, null: true
-      t.string :ask,          limit: 128, null: true
-      t.string :subscription, limit: 128, null: false
-    end
-    add_index :chat_contacts, [:user_id, :jid], unique: true, :length => {:jid => 190}
-  end
-
-  def down
-    drop_table :chat_contacts
-  end
-end
diff --git a/db/migrate/20140801101352_create_chat_fragments.rb b/db/migrate/20140801101352_create_chat_fragments.rb
deleted file mode 100644
index 0457abf22..000000000
--- a/db/migrate/20140801101352_create_chat_fragments.rb
+++ /dev/null
@@ -1,17 +0,0 @@
-class CreateChatFragments < ActiveRecord::Migration[4.2]
-  def up
-    create_table :chat_fragments do |t|
-      t.integer :user_id, null: false
-      t.string :root, limit: 256, null: false
-      t.string :namespace, limit: 256, null: false
-      t.text :xml, null: false
-    end
-    # That won't work due UTF-8 and the limit of 767 bytes
-    #add_index :chat_fragments, [:user_id, :root, :namespace], unique: true
-    add_index :chat_fragments, [:user_id], unique: true
-  end
-
-  def down
-    drop_table :chat_fragments
-  end
-end
diff --git a/db/migrate/20140824230505_add_completed_at_to_account_deletions.rb b/db/migrate/20140824230505_add_completed_at_to_account_deletions.rb
deleted file mode 100644
index 2c701dcac..000000000
--- a/db/migrate/20140824230505_add_completed_at_to_account_deletions.rb
+++ /dev/null
@@ -1,5 +0,0 @@
-class AddCompletedAtToAccountDeletions < ActiveRecord::Migration[4.2]
-  def change
-    add_column :account_deletions, :completed_at, :datetime
-  end
-end
diff --git a/db/migrate/20140826165533_increase_simple_captcha_limit.rb b/db/migrate/20140826165533_increase_simple_captcha_limit.rb
deleted file mode 100644
index c0d7d4827..000000000
--- a/db/migrate/20140826165533_increase_simple_captcha_limit.rb
+++ /dev/null
@@ -1,8 +0,0 @@
-class IncreaseSimpleCaptchaLimit < ActiveRecord::Migration[4.2]
-  def self.up
-    change_column :simple_captcha_data, :value, :string, :limit => 12
-  end
-  def self.down
-    change_column :simple_captcha_data, :value, :string, :limit => 6
-  end
-end
diff --git a/db/migrate/20140906192846_fix_open_graph_data.rb b/db/migrate/20140906192846_fix_open_graph_data.rb
deleted file mode 100644
index 5aec2b531..000000000
--- a/db/migrate/20140906192846_fix_open_graph_data.rb
+++ /dev/null
@@ -1,10 +0,0 @@
-class FixOpenGraphData < ActiveRecord::Migration[4.2]
-  def self.up
-    change_column :open_graph_caches, :url, :text
-    change_column :open_graph_caches, :image, :text
-  end
-  def self.down
-    change_column :open_graph_caches, :url, :string
-    change_column :open_graph_caches, :image, :string
-  end
-end
diff --git a/db/migrate/20141001162851_add_remove_after_to_users.rb b/db/migrate/20141001162851_add_remove_after_to_users.rb
deleted file mode 100644
index 8169e5e8b..000000000
--- a/db/migrate/20141001162851_add_remove_after_to_users.rb
+++ /dev/null
@@ -1,5 +0,0 @@
-class AddRemoveAfterToUsers < ActiveRecord::Migration[4.2]
-  def change
-  	add_column :users, :remove_after, :datetime
-  end
-end
diff --git a/db/migrate/20141007003922_add_chat_enabled_to_aspects.rb b/db/migrate/20141007003922_add_chat_enabled_to_aspects.rb
deleted file mode 100644
index a5e300b94..000000000
--- a/db/migrate/20141007003922_add_chat_enabled_to_aspects.rb
+++ /dev/null
@@ -1,9 +0,0 @@
-class AddChatEnabledToAspects < ActiveRecord::Migration[4.2]
-  def self.up
-    add_column :aspects, :chat_enabled, :boolean, default: false
-  end
-
-  def self.down
-    remove_column :aspects, :chat_enabled
-  end
-end
diff --git a/db/migrate/20141024170120_create_chat_offline_messages.rb b/db/migrate/20141024170120_create_chat_offline_messages.rb
deleted file mode 100644
index 5c31e632d..000000000
--- a/db/migrate/20141024170120_create_chat_offline_messages.rb
+++ /dev/null
@@ -1,14 +0,0 @@
-class CreateChatOfflineMessages < ActiveRecord::Migration[4.2]
-  def self.up
-    create_table :chat_offline_messages do |t|
-      t.string :from, :null => false
-      t.string :to, :null => false
-      t.text :message, :null => false
-      t.datetime "created_at", :null => false
-    end
-  end
-
-  def self.down
-    drop_table :chat_offline_messages
-  end
-end
diff --git a/db/migrate/20141209041241_drop_open_graph_caches_with_invalid_urls.rb b/db/migrate/20141209041241_drop_open_graph_caches_with_invalid_urls.rb
deleted file mode 100644
index 1c2b3dbf7..000000000
--- a/db/migrate/20141209041241_drop_open_graph_caches_with_invalid_urls.rb
+++ /dev/null
@@ -1,9 +0,0 @@
-class DropOpenGraphCachesWithInvalidUrls < ActiveRecord::Migration[4.2]
-  def up
-    OpenGraphCache.where(url: 'http://').delete_all
-  end
-
-  def down
-    raise ActiveRecord::IrreversibleMigration 
-  end
-end
diff --git a/db/migrate/20141216213423_purge_orphan_conversations.rb b/db/migrate/20141216213423_purge_orphan_conversations.rb
deleted file mode 100644
index 45e6f5856..000000000
--- a/db/migrate/20141216213423_purge_orphan_conversations.rb
+++ /dev/null
@@ -1,13 +0,0 @@
-class PurgeOrphanConversations < ActiveRecord::Migration[4.2]
-  def up
-    Conversation.where(id: Conversation.joins("LEFT JOIN conversation_visibilities ON conversation_visibilities.conversation_id = conversations.id")
-		                       .group('conversations.id')
-				       .having("COUNT(conversation_visibilities.id) = 0")
-				       .pluck('conversations.id')
-    ).delete_all
-  end
-
-  def down
-    raise ActiveRecord::IrreversibleMigration
-  end
-end
diff --git a/db/migrate/20141227120907_add_export_to_user.rb b/db/migrate/20141227120907_add_export_to_user.rb
deleted file mode 100644
index ef1779f76..000000000
--- a/db/migrate/20141227120907_add_export_to_user.rb
+++ /dev/null
@@ -1,7 +0,0 @@
-class AddExportToUser < ActiveRecord::Migration[4.2]
-  def change
-    add_column :users, :export, :string
-    add_column :users, :exported_at, :datetime
-    add_column :users, :exporting, :boolean, default: false
-  end
-end
diff --git a/db/migrate/20141230214830_user_pref_strip_exif.rb b/db/migrate/20141230214830_user_pref_strip_exif.rb
deleted file mode 100644
index b573d4874..000000000
--- a/db/migrate/20141230214830_user_pref_strip_exif.rb
+++ /dev/null
@@ -1,9 +0,0 @@
-class UserPrefStripExif < ActiveRecord::Migration[4.2]
-  def up
-    add_column :users, :strip_exif, :boolean, default: true
-  end
-  
-  def down
-    remove_column :users, :strip_exif
-  end
-end
diff --git a/db/migrate/20150209230946_disable_mail_for_closed_account.rb b/db/migrate/20150209230946_disable_mail_for_closed_account.rb
deleted file mode 100644
index 2dd573745..000000000
--- a/db/migrate/20150209230946_disable_mail_for_closed_account.rb
+++ /dev/null
@@ -1,9 +0,0 @@
-class DisableMailForClosedAccount < ActiveRecord::Migration[4.2]
-  def up
-    User.joins(:person).where(people: {closed_account: true}).update_all(disable_mail: true)
-  end
-
-  def down
-    User.joins(:person).where(people: {closed_account: true}).update_all(disable_mail: false)
-  end
-end
diff --git a/db/migrate/20150220001357_add_photos_export_to_user.rb b/db/migrate/20150220001357_add_photos_export_to_user.rb
deleted file mode 100644
index 6bec80420..000000000
--- a/db/migrate/20150220001357_add_photos_export_to_user.rb
+++ /dev/null
@@ -1,13 +0,0 @@
-class AddPhotosExportToUser < ActiveRecord::Migration[4.2]
-  def up
-    add_column :users, :exported_photos_file, :string
-    add_column :users, :exported_photos_at, :datetime
-    add_column :users, :exporting_photos, :boolean, default: false
-  end
-
-  def down
-    remove_column :users, :exported_photos_file
-    remove_column :users, :exported_photos_at
-    remove_column :users, :exporting_photos
-  end
-end
diff --git a/db/migrate/20150403192408_remove_deleted_aspects_from_auto_follow_back.rb b/db/migrate/20150403192408_remove_deleted_aspects_from_auto_follow_back.rb
deleted file mode 100644
index f5f19e750..000000000
--- a/db/migrate/20150403192408_remove_deleted_aspects_from_auto_follow_back.rb
+++ /dev/null
@@ -1,11 +0,0 @@
-class RemoveDeletedAspectsFromAutoFollowBack < ActiveRecord::Migration[4.2]
-  def up
-    User.where.not(auto_follow_back_aspect_id: Aspect.select(:id))
-      .where(auto_follow_back: true)
-      .update_all(auto_follow_back: false, auto_follow_back_aspect_id: nil)
-  end
-
-  def down
-    raise ActiveRecord::IrreversibleMigration
-  end
-end
diff --git a/db/migrate/20150403212139_fix_wrong_only_sharing.rb b/db/migrate/20150403212139_fix_wrong_only_sharing.rb
deleted file mode 100644
index c02f4bba6..000000000
--- a/db/migrate/20150403212139_fix_wrong_only_sharing.rb
+++ /dev/null
@@ -1,11 +0,0 @@
-class FixWrongOnlySharing < ActiveRecord::Migration[4.2]
-  def up
-    Contact.where(sharing: true, receiving: false)
-      .where(id: AspectMembership.select(:contact_id))
-      .update_all(receiving: true)
-  end
-
-  def down
-    raise ActiveRecord::IrreversibleMigration
-  end
-end
diff --git a/db/migrate/20150523004437_enable_color_themes.rb b/db/migrate/20150523004437_enable_color_themes.rb
deleted file mode 100644
index 816fd1fbf..000000000
--- a/db/migrate/20150523004437_enable_color_themes.rb
+++ /dev/null
@@ -1,9 +0,0 @@
-class EnableColorThemes < ActiveRecord::Migration[4.2]
-  def up
-    add_column(:users, :color_theme, :string)
-  end
-
-  def down
-    remove_column(:users, :color_theme)
-  end
-end
diff --git a/db/migrate/20150531005120_cleanup_default_avatars.rb b/db/migrate/20150531005120_cleanup_default_avatars.rb
deleted file mode 100644
index f3dcee9a2..000000000
--- a/db/migrate/20150531005120_cleanup_default_avatars.rb
+++ /dev/null
@@ -1,10 +0,0 @@
-class CleanupDefaultAvatars < ActiveRecord::Migration[4.2]
-  def up
-    Profile.where("image_url LIKE ?", "%user/default%")
-      .update_all(image_url: nil, image_url_small: nil, image_url_medium: nil)
-  end
-
-  def down
-    raise ActiveRecord::IrreversibleMigration
-  end
-end
diff --git a/db/migrate/20150607143809_fix_photo_public_flag.rb b/db/migrate/20150607143809_fix_photo_public_flag.rb
deleted file mode 100644
index ee223cd6a..000000000
--- a/db/migrate/20150607143809_fix_photo_public_flag.rb
+++ /dev/null
@@ -1,9 +0,0 @@
-class FixPhotoPublicFlag < ActiveRecord::Migration[4.2]
-  def up
-    Photo.joins(:status_message).where(posts: {public: true}).update_all(public: true)
-  end
-
-  def down
-    raise ActiveRecord::IrreversibleMigration
-  end
-end
diff --git a/db/migrate/20150613202109_create_o_auth_applications.rb b/db/migrate/20150613202109_create_o_auth_applications.rb
deleted file mode 100644
index a39f0ace9..000000000
--- a/db/migrate/20150613202109_create_o_auth_applications.rb
+++ /dev/null
@@ -1,30 +0,0 @@
-# Inspired by https://github.com/nov/openid_connect_sample/blob/master/db/migrate/20110829023826_create_clients.rb
-
-class CreateOAuthApplications < ActiveRecord::Migration[4.2]
-  def change
-    create_table :o_auth_applications do |t|
-      t.belongs_to :user, index: true
-      t.string :client_id, index: {unique: true, length: 191}
-      t.string :client_secret
-      t.string :client_name
-
-      t.text :redirect_uris
-      t.string :response_types
-      t.string :grant_types
-      t.string :application_type, default: "web"
-      t.string :contacts
-      t.string :logo_uri
-      t.string :client_uri
-      t.string :policy_uri
-      t.string :tos_uri
-      t.string :sector_identifier_uri
-      t.string :token_endpoint_auth_method
-      t.text :jwks
-      t.string :jwks_uri
-      t.boolean :ppid, default: false
-
-      t.timestamps null: false
-    end
-    add_foreign_key :o_auth_applications, :users
-  end
-end
diff --git a/db/migrate/20150630221004_add_public_to_profiles.rb b/db/migrate/20150630221004_add_public_to_profiles.rb
deleted file mode 100644
index 4797c1f38..000000000
--- a/db/migrate/20150630221004_add_public_to_profiles.rb
+++ /dev/null
@@ -1,5 +0,0 @@
-class AddPublicToProfiles < ActiveRecord::Migration[4.2]
-  def change
-    add_column :profiles, :public_details, :boolean, default: false
-  end
-end
diff --git a/db/migrate/20150708153926_create_authorizations.rb b/db/migrate/20150708153926_create_authorizations.rb
deleted file mode 100644
index b9e06dd2c..000000000
--- a/db/migrate/20150708153926_create_authorizations.rb
+++ /dev/null
@@ -1,18 +0,0 @@
-class CreateAuthorizations < ActiveRecord::Migration[4.2]
-  def change
-    create_table :authorizations do |t|
-      t.belongs_to :user, index: true
-      t.belongs_to :o_auth_application, index: true
-      t.string :refresh_token
-      t.string :code
-      t.string :redirect_uri
-      t.string :nonce
-      t.string :scopes
-      t.boolean :code_used, default: false
-
-      t.timestamps null: false
-    end
-    add_foreign_key :authorizations, :users
-    add_foreign_key :authorizations, :o_auth_applications
-  end
-end
diff --git a/db/migrate/20150708153928_create_o_auth_access_tokens.rb b/db/migrate/20150708153928_create_o_auth_access_tokens.rb
deleted file mode 100644
index 779283cbe..000000000
--- a/db/migrate/20150708153928_create_o_auth_access_tokens.rb
+++ /dev/null
@@ -1,14 +0,0 @@
-# Inspired by https://github.com/nov/openid_connect_sample/blob/master/db/migrate/20110829023837_create_access_tokens.rb
-
-class CreateOAuthAccessTokens < ActiveRecord::Migration[4.2]
-  def change
-    create_table :o_auth_access_tokens do |t|
-      t.belongs_to :authorization, index: true
-      t.string :token, index: {unique: true, length: 191}
-      t.datetime :expires_at
-
-      t.timestamps null: false
-    end
-    add_foreign_key :o_auth_access_tokens, :authorizations
-  end
-end
diff --git a/db/migrate/20150714055110_create_id_tokens.rb b/db/migrate/20150714055110_create_id_tokens.rb
deleted file mode 100644
index df98206a4..000000000
--- a/db/migrate/20150714055110_create_id_tokens.rb
+++ /dev/null
@@ -1,14 +0,0 @@
-# Inspired by https://github.com/nov/openid_connect_sample/blob/master/db/migrate/20110829024010_create_id_tokens.rb
-
-class CreateIdTokens < ActiveRecord::Migration[4.2]
-  def change
-    create_table :id_tokens do |t|
-      t.belongs_to :authorization, index: true
-      t.datetime :expires_at
-      t.string :nonce
-
-      t.timestamps null: false
-    end
-    add_foreign_key :id_tokens, :authorizations
-  end
-end
diff --git a/db/migrate/20150724152052_remove_favorites_from_posts.rb b/db/migrate/20150724152052_remove_favorites_from_posts.rb
deleted file mode 100644
index 737d3c593..000000000
--- a/db/migrate/20150724152052_remove_favorites_from_posts.rb
+++ /dev/null
@@ -1,9 +0,0 @@
-class RemoveFavoritesFromPosts < ActiveRecord::Migration[4.2]
-  def self.up
-    remove_column :posts, :favorite
-  end
-
-  def self.down
-    add_column :posts, :favorite, :boolean, default: false
-  end
-end
diff --git a/db/migrate/20150731123113_create_pairwise_pseudonymous_identifiers.rb b/db/migrate/20150731123113_create_pairwise_pseudonymous_identifiers.rb
deleted file mode 100644
index 12ed8597f..000000000
--- a/db/migrate/20150731123113_create_pairwise_pseudonymous_identifiers.rb
+++ /dev/null
@@ -1,15 +0,0 @@
-# Inspired by https://github.com/nov/openid_connect_sample/blob/master/db/migrate/20110829024140_create_pairwise_pseudonymous_identifiers.rb
-
-class CreatePairwisePseudonymousIdentifiers < ActiveRecord::Migration[4.2]
-  def change
-    create_table :ppid do |t|
-      t.belongs_to :o_auth_application, index: true
-      t.belongs_to :user, index: true
-
-      t.string :guid, :string, limit: 32
-      t.string :identifier
-    end
-    add_foreign_key :ppid, :o_auth_applications
-    add_foreign_key :ppid, :users
-  end
-end
diff --git a/db/migrate/20150731123114_add_status_to_pods.rb b/db/migrate/20150731123114_add_status_to_pods.rb
deleted file mode 100644
index e94a011b1..000000000
--- a/db/migrate/20150731123114_add_status_to_pods.rb
+++ /dev/null
@@ -1,14 +0,0 @@
-class AddStatusToPods < ActiveRecord::Migration[4.2]
-  def change
-    add_column :pods, :status, :integer, default: 0
-    add_column :pods, :checked_at, :datetime, default: Time.zone.at(0)
-    add_column :pods, :offline_since, :datetime, default: nil
-    add_column :pods, :response_time, :integer, default: -1
-    add_column :pods, :software, :string, limit: 255
-    add_column :pods, :error, :string, limit: 255
-
-    add_index :pods, :status
-    add_index :pods, :checked_at
-    add_index :pods, :offline_since
-  end
-end
diff --git a/db/migrate/20150828132451_remove_duplicate_and_empty_pods.rb b/db/migrate/20150828132451_remove_duplicate_and_empty_pods.rb
deleted file mode 100644
index f3d434474..000000000
--- a/db/migrate/20150828132451_remove_duplicate_and_empty_pods.rb
+++ /dev/null
@@ -1,24 +0,0 @@
-class RemoveDuplicateAndEmptyPods < ActiveRecord::Migration[4.2]
-  def up
-    remove_dupes
-    remove_empty_or_nil
-
-    add_index :pods, :host, unique: true, length: 190 # =190*4 for utf8mb4
-  end
-
-  def down
-    remove_index :pods, :host
-  end
-
-  private
-
-  def remove_dupes
-    duplicates = Pod.group(:host).count.select {|_, v| v > 1 }.keys
-    ids = duplicates.flat_map {|pod| Pod.where(host: pod).order(created_at: :asc).pluck(:id).tap(&:shift) }
-    Pod.where(id: ids).destroy_all
-  end
-
-  def remove_empty_or_nil
-    Pod.where(host: [nil, ""]).destroy_all
-  end
-end
diff --git a/db/migrate/20151003142048_update_report_item_types.rb b/db/migrate/20151003142048_update_report_item_types.rb
deleted file mode 100644
index 3d4972537..000000000
--- a/db/migrate/20151003142048_update_report_item_types.rb
+++ /dev/null
@@ -1,7 +0,0 @@
-class UpdateReportItemTypes < ActiveRecord::Migration[4.2]
-  def change
-    Report.all.each do |report|
-      report.update_attribute :item_type, report[:item_type].capitalize
-    end
-  end
-end
diff --git a/db/migrate/20151210213023_remove_signatures_from_relayables.rb b/db/migrate/20151210213023_remove_signatures_from_relayables.rb
deleted file mode 100644
index c9b7a45fa..000000000
--- a/db/migrate/20151210213023_remove_signatures_from_relayables.rb
+++ /dev/null
@@ -1,9 +0,0 @@
-class RemoveSignaturesFromRelayables < ActiveRecord::Migration[4.2]
-  def change
-    remove_column :comments, :parent_author_signature, :text
-    remove_column :poll_participations, :parent_author_signature, :text
-    remove_column :messages, :parent_author_signature, :text
-    remove_column :participations, :parent_author_signature, :text
-    remove_column :likes, :parent_author_signature, :text
-  end
-end
diff --git a/db/migrate/20160124234712_extend_pods.rb b/db/migrate/20160124234712_extend_pods.rb
deleted file mode 100644
index 9f2dc7ebc..000000000
--- a/db/migrate/20160124234712_extend_pods.rb
+++ /dev/null
@@ -1,77 +0,0 @@
-class ExtendPods < ActiveRecord::Migration[4.2]
-  class Pod < ApplicationRecord
-    has_many :people
-
-    DEFAULT_PORTS = [URI::HTTP::DEFAULT_PORT, URI::HTTPS::DEFAULT_PORT]
-
-    def self.find_or_create_by(opts)
-      uri = URI.parse(opts.fetch(:url))
-      port = DEFAULT_PORTS.include?(uri.port) ? nil : uri.port
-      find_or_initialize_by(host: uri.host, port: port).tap do |pod|
-        pod.ssl ||= (uri.scheme == "https")
-        pod.save
-      end
-    end
-
-    def url
-      (ssl ? URI::HTTPS : URI::HTTP).build(host: host, port: port, path: "/")
-    end
-  end
-
-  class Person < ApplicationRecord
-    belongs_to :owner, class_name: "User"
-    belongs_to :pod
-
-    def url
-      owner_id.nil? ? pod.url.to_s : AppConfig.url_to("/")
-    end
-  end
-
-  class User < ApplicationRecord
-    has_one :person, inverse_of: :owner, foreign_key: :owner_id
-  end
-
-  def up
-    remove_index :pods, :host
-
-    # add port
-    add_column :pods, :port, :integer
-    add_index :pods, %i(host port), unique: true, length: {host: 190, port: nil}, using: :btree
-
-    add_column :pods, :blocked, :boolean, default: false
-
-    Pod.reset_column_information
-
-    # link people with pod
-    add_column :people, :pod_id, :integer
-    add_index :people, :url, length: 190
-    add_foreign_key :people, :pods, name: :people_pod_id_fk, on_delete: :cascade
-    Person.where(owner: nil).distinct(:url).pluck(:url).each do |url|
-      pod = Pod.find_or_create_by(url: url)
-      Person.where(url: url, owner_id: nil).update_all(pod_id: pod.id) if pod.persisted?
-    end
-
-    # cleanup unused pods
-    Pod.joins("LEFT OUTER JOIN people ON pods.id = people.pod_id").where("people.id is NULL").delete_all
-
-    remove_column :people, :url
-  end
-
-  def down
-    # restore url
-    add_column :people, :url, :text
-    Person.all.group_by(&:pod_id).each do |pod_id, persons|
-      Person.where(pod_id: pod_id).update_all(url: persons.first.url)
-    end
-    change_column :people, :url, :text, null: false
-    remove_foreign_key :people, :pods
-    remove_column :people, :pod_id
-
-    # remove pods with port
-    Pod.where.not(port: nil).delete_all
-
-    remove_index :pods, column: %i(host port)
-    remove_columns :pods, :port, :blocked
-    add_index :pods, :host, unique: true, length: 190
-  end
-end
diff --git a/db/migrate/20160225232049_link_share_visibilities_with_user.rb b/db/migrate/20160225232049_link_share_visibilities_with_user.rb
deleted file mode 100644
index 8a6f0f5ea..000000000
--- a/db/migrate/20160225232049_link_share_visibilities_with_user.rb
+++ /dev/null
@@ -1,80 +0,0 @@
-class LinkShareVisibilitiesWithUser < ActiveRecord::Migration[4.2]
-  class ShareVisibility < ApplicationRecord
-  end
-
-  def up
-    cleanup_deleted_share_visibilities
-
-    remove_columns :share_visibilities, :created_at, :updated_at
-    add_column :share_visibilities, :user_id, :integer
-
-    # update_all from AR doesn't work with postgres, see: https://github.com/rails/rails/issues/13496
-    if AppConfig.postgres?
-      execute "UPDATE share_visibilities SET user_id = contacts.user_id " \
-              "FROM contacts WHERE contacts.id = share_visibilities.contact_id"
-    else
-      ShareVisibility.joins("INNER JOIN contacts ON share_visibilities.contact_id = contacts.id")
-        .update_all("share_visibilities.user_id = contacts.user_id")
-    end
-
-    remove_foreign_key :share_visibilities, name: :post_visibilities_contact_id_fk
-
-    remove_index :share_visibilities, name: :index_post_visibilities_on_contact_id
-    remove_index :share_visibilities, name: :shareable_and_contact_id
-    remove_index :share_visibilities, name: :shareable_and_hidden_and_contact_id
-
-    remove_column :share_visibilities, :contact_id
-
-    ShareVisibility.joins("LEFT OUTER JOIN users ON users.id = share_visibilities.user_id")
-                   .where("users.id is NULL").delete_all
-
-    change_column :share_visibilities, :user_id, :integer, null: false
-
-    add_index :share_visibilities, :user_id
-    add_index :share_visibilities, %i(shareable_id shareable_type user_id), name: :shareable_and_user_id
-    add_index :share_visibilities, %i(shareable_id shareable_type hidden user_id),
-              name: :shareable_and_hidden_and_user_id
-
-    add_foreign_key :share_visibilities, :users, name: :share_visibilities_user_id_fk, on_delete: :cascade
-  end
-
-  def down
-    add_column :share_visibilities, :contact_id, :integer
-
-    if AppConfig.postgres?
-      execute "UPDATE share_visibilities SET contact_id = contacts.id " \
-              "FROM contacts WHERE contacts.user_id = share_visibilities.user_id"
-    else
-      ShareVisibility.joins("INNER JOIN contacts ON share_visibilities.user_id = contacts.user_id")
-        .update_all("share_visibilities.contact_id = contacts.id")
-    end
-
-    remove_foreign_key :share_visibilities, name: :share_visibilities_user_id_fk
-
-    remove_index :share_visibilities, :user_id
-    remove_index :share_visibilities, name: :shareable_and_user_id
-    remove_index :share_visibilities, name: :shareable_and_hidden_and_user_id
-
-    remove_column :share_visibilities, :user_id
-    change_column :share_visibilities, :contact_id, :integer, null: false
-
-    add_index :share_visibilities, :contact_id, name: :index_post_visibilities_on_contact_id
-    add_index :share_visibilities, %i(shareable_id shareable_type contact_id), name: :shareable_and_contact_id
-    add_index :share_visibilities, %i(shareable_id shareable_type hidden contact_id),
-              name: :shareable_and_hidden_and_contact_id
-
-    add_foreign_key :share_visibilities, :contacts, name: :post_visibilities_contact_id_fk, on_delete: :cascade
-
-    add_column :share_visibilities, :created_at, :datetime
-    add_column :share_visibilities, :updated_at, :datetime
-  end
-
-  private
-
-  def cleanup_deleted_share_visibilities
-    ShareVisibility.joins("LEFT OUTER JOIN posts ON posts.id = share_visibilities.shareable_id")
-                   .where(shareable_type: "Post").where("posts.id is NULL").delete_all
-    ShareVisibility.joins("LEFT OUTER JOIN photos ON photos.id = share_visibilities.shareable_id")
-                   .where(shareable_type: "Photo").where("photos.id is NULL").delete_all
-  end
-end
diff --git a/db/migrate/20160302025129_cleanup_aspect_visibility.rb b/db/migrate/20160302025129_cleanup_aspect_visibility.rb
deleted file mode 100644
index 7d3ae9c5f..000000000
--- a/db/migrate/20160302025129_cleanup_aspect_visibility.rb
+++ /dev/null
@@ -1,27 +0,0 @@
-class CleanupAspectVisibility < ActiveRecord::Migration[4.2]
-  class AspectVisibility < ApplicationRecord
-  end
-
-  def up
-    AspectVisibility.joins("LEFT OUTER JOIN posts ON posts.id = aspect_visibilities.shareable_id")
-                    .where(shareable_type: "Post").where("posts.id is NULL").delete_all
-    AspectVisibility.joins("LEFT OUTER JOIN photos ON photos.id = aspect_visibilities.shareable_id")
-                    .where(shareable_type: "Photo").where("photos.id is NULL").delete_all
-    AspectVisibility.joins("INNER JOIN posts ON posts.id = aspect_visibilities.shareable_id")
-                    .where(shareable_type: "Post").where(posts: {public: true}).delete_all
-    AspectVisibility.joins("INNER JOIN photos ON photos.id = aspect_visibilities.shareable_id")
-                    .where(shareable_type: "Photo").where(photos: {public: true}).delete_all
-
-    remove_columns :aspect_visibilities, :created_at, :updated_at
-  end
-
-  def down
-    add_column :aspect_visibilities, :created_at, :datetime
-    add_column :aspect_visibilities, :updated_at, :datetime
-
-    User.all.each do |user|
-      user.posts.where(public: true).each {|post| user.add_to_streams(post, user.aspects) }
-      user.photos.where(public: true).each {|photo| user.add_to_streams(photo, user.aspects) }
-    end
-  end
-end
diff --git a/db/migrate/20160307142216_cleanup_handles.rb b/db/migrate/20160307142216_cleanup_handles.rb
deleted file mode 100644
index e39be2279..000000000
--- a/db/migrate/20160307142216_cleanup_handles.rb
+++ /dev/null
@@ -1,7 +0,0 @@
-class CleanupHandles < ActiveRecord::Migration[4.2]
-  def change
-    remove_column :photos, :tmp_old_id, :integer
-    remove_column :photos, :diaspora_handle, :string
-    remove_column :posts, :diaspora_handle, :string
-  end
-end
diff --git a/db/migrate/20160327103605_add_author_id_index_to_participations.rb b/db/migrate/20160327103605_add_author_id_index_to_participations.rb
deleted file mode 100644
index c41607981..000000000
--- a/db/migrate/20160327103605_add_author_id_index_to_participations.rb
+++ /dev/null
@@ -1,5 +0,0 @@
-class AddAuthorIdIndexToParticipations < ActiveRecord::Migration[4.2]
-  def change
-    add_index :participations, :author_id, :using => :btree
-  end
-end
diff --git a/db/migrate/20160509232726_cleanup_duplicates_and_add_unique_indexes.rb b/db/migrate/20160509232726_cleanup_duplicates_and_add_unique_indexes.rb
deleted file mode 100644
index 4e17deb71..000000000
--- a/db/migrate/20160509232726_cleanup_duplicates_and_add_unique_indexes.rb
+++ /dev/null
@@ -1,47 +0,0 @@
-class CleanupDuplicatesAndAddUniqueIndexes < ActiveRecord::Migration[4.2]
-  def up
-    # temporary index to speed up the migration
-    add_index :photos, :guid, length: 191
-
-    # fix share visibilities for private photos
-    if AppConfig.postgres?
-      execute "UPDATE share_visibilities" \
-              " SET shareable_id = (SELECT MIN(p3.id) FROM photos as p3 WHERE p3.guid = p1.guid)" \
-              " FROM photos as p1, photos as p2" \
-              " WHERE p1.id = share_visibilities.shareable_id AND (p1.guid = p2.guid AND p1.id > p2.id)" \
-              " AND share_visibilities.shareable_type = 'Photo'"
-    else
-      execute "UPDATE share_visibilities" \
-              " INNER JOIN photos as p1 ON p1.id = share_visibilities.shareable_id" \
-              " INNER JOIN photos as p2 ON p1.guid = p2.guid AND p1.id > p2.id" \
-              " SET share_visibilities.shareable_id = (SELECT MIN(p3.id) FROM photos as p3 WHERE p3.guid = p1.guid)" \
-              " WHERE share_visibilities.shareable_type = 'Photo'"
-    end
-
-    %i(conversations messages photos polls poll_answers poll_participations).each do |table|
-      delete_duplicates_and_create_unique_index(table)
-    end
-  end
-
-  def down
-    raise ActiveRecord::IrreversibleMigration
-  end
-
-  private
-
-  def delete_duplicates_and_create_unique_index(table)
-    # temporary index to speed up the migration
-    add_index table, :guid, length: 191 unless table == :photos
-
-    if AppConfig.postgres?
-      execute "DELETE FROM #{table} AS t1 USING #{table} AS t2 WHERE t1.guid = t2.guid AND t1.id > t2.id"
-    else
-      execute "DELETE t1 FROM #{table} t1, #{table} t2 WHERE t1.guid = t2.guid AND t1.id > t2.id"
-    end
-
-    remove_index table, column: :guid
-
-    # now create unique index \o/
-    add_index table, :guid, length: 191, unique: true
-  end
-end
diff --git a/db/migrate/20160531170531_remove_duplicate_aspect_visibilities.rb b/db/migrate/20160531170531_remove_duplicate_aspect_visibilities.rb
deleted file mode 100644
index 40306c898..000000000
--- a/db/migrate/20160531170531_remove_duplicate_aspect_visibilities.rb
+++ /dev/null
@@ -1,11 +0,0 @@
-class RemoveDuplicateAspectVisibilities < ActiveRecord::Migration[4.2]
-  def up
-    where = "WHERE a1.aspect_id = a2.aspect_id AND a1.shareable_id = a2.shareable_id AND "\
-      "a1.shareable_type = a2.shareable_type AND a1.id > a2.id"
-    if AppConfig.postgres?
-      execute("DELETE FROM aspect_visibilities AS a1 USING aspect_visibilities AS a2 #{where}")
-    else
-      execute("DELETE a1 FROM aspect_visibilities a1, aspect_visibilities a2 #{where}")
-    end
-  end
-end
diff --git a/db/migrate/20160618033455_cleanup_participations.rb b/db/migrate/20160618033455_cleanup_participations.rb
deleted file mode 100644
index df27d04a7..000000000
--- a/db/migrate/20160618033455_cleanup_participations.rb
+++ /dev/null
@@ -1,44 +0,0 @@
-class CleanupParticipations < ActiveRecord::Migration[4.2]
-  class Participation < ApplicationRecord
-  end
-
-  def up
-    remove_column :participations, :author_signature
-
-    cleanup
-
-    remove_index :participations, name: :index_participations_on_target_id_and_target_type_and_author_id
-    add_index :participations, %i(target_id target_type author_id), unique: true
-  end
-
-  def down
-    remove_index :participations, name: :index_participations_on_target_id_and_target_type_and_author_id
-    add_index :participations, %i(target_id target_type author_id)
-    add_column :participations, :author_signature, :text
-  end
-
-  private
-
-  def cleanup
-    self_where = "WHERE participations.target_type = 'Post' AND participations.target_id = posts.id AND " \
-                 "posts.author_id = participations.author_id"
-    remote_where = "WHERE participations.target_type = 'Post' AND participations.target_id = posts.id AND " \
-                   "posts.author_id = post_author.id AND participations.author_id = author.id AND " \
-                   "author.owner_id is NULL AND post_author.owner_id is NULL"
-    duplicate_where = "WHERE p1.author_id = p2.author_id AND p1.target_id = p2.target_id " \
-                      "AND p1.target_type = p2.target_type AND p1.id > p2.id"
-
-    if AppConfig.postgres?
-      execute "DELETE FROM participations USING posts #{self_where}"
-      execute "DELETE FROM participations USING posts, people AS author, people AS post_author #{remote_where}"
-      execute "DELETE FROM participations AS p1 USING participations AS p2 #{duplicate_where}"
-    else
-      execute "DELETE participations FROM participations, posts #{self_where}"
-      execute "DELETE participations FROM participations, posts, people author, people post_author #{remote_where}"
-      execute "DELETE p1 FROM participations p1, participations p2 #{duplicate_where}"
-    end
-
-    Participation.joins("LEFT OUTER JOIN posts ON posts.id = participations.target_id")
-                 .where(target_type: "Post").where("posts.id is NULL").delete_all
-  end
-end
diff --git a/db/migrate/20160720212620_create_signature_tables.rb b/db/migrate/20160720212620_create_signature_tables.rb
deleted file mode 100644
index fa843fcdd..000000000
--- a/db/migrate/20160720212620_create_signature_tables.rb
+++ /dev/null
@@ -1,87 +0,0 @@
-class CreateSignatureTables < ActiveRecord::Migration[4.2]
-  class SignatureOrder < ApplicationRecord
-  end
-
-  RELAYABLES = %i(comment like poll_participation).freeze
-
-  def self.up
-    create_table :signature_orders do |t|
-      t.string :order, null: false
-    end
-    add_index :signature_orders, :order, length: 191, unique: true
-
-    RELAYABLES.each {|relayable_type| create_signature_table(relayable_type) }
-
-    migrate_signatures
-
-    RELAYABLES.each {|relayable_type| remove_column "#{relayable_type}s", :author_signature }
-  end
-
-  def self.down
-    RELAYABLES.each {|relayable_type| add_column "#{relayable_type}s", :author_signature, :text }
-
-    RELAYABLES.each {|relayable_type| restore_signatures(relayable_type) }
-
-    drop_table :comment_signatures
-    drop_table :like_signatures
-    drop_table :poll_participation_signatures
-    drop_table :signature_orders
-  end
-
-  private
-
-  def create_signature_table(relayable_type)
-    create_table "#{relayable_type}_signatures", id: false do |t|
-      t.integer "#{relayable_type}_id", null: false
-      t.text    :author_signature,      null: false
-      t.integer :signature_order_id,    null: false
-      t.text    :additional_data
-    end
-
-    add_index "#{relayable_type}_signatures", "#{relayable_type}_id", unique: true
-
-    add_foreign_key "#{relayable_type}_signatures", :signature_orders,
-                    name: "#{relayable_type}_signatures_signature_orders_id_fk"
-    add_foreign_key "#{relayable_type}_signatures", "#{relayable_type}s",
-                    name: "#{relayable_type}_signatures_#{relayable_type}_id_fk", on_delete: :cascade
-  end
-
-  def migrate_signatures
-    comment_order_id = SignatureOrder.create!(order: "guid parent_guid text author").id
-    comment_parent_join = "INNER JOIN posts AS parent ON relayable.commentable_id = parent.id"
-    migrate_signatures_for(:comment, comment_order_id, comment_parent_join)
-
-    like_order_id = SignatureOrder.create!(order: "positive guid parent_type parent_guid author").id
-    post_like_join = "INNER JOIN posts AS parent ON relayable.target_id = parent.id AND relayable.target_type = 'Post'"
-    comment_like_join = "INNER JOIN comments ON relayable.target_id = comments.id " \
-                        "AND relayable.target_type = 'Comment' " \
-                        "INNER JOIN posts AS parent ON comments.commentable_id = parent.id"
-    migrate_signatures_for(:like, like_order_id, post_like_join)
-    migrate_signatures_for(:like, like_order_id, comment_like_join)
-
-    poll_participation_order_id = SignatureOrder.create!(order: "guid parent_guid author poll_answer_guid").id
-    poll_participation_parent_join = "INNER JOIN polls ON relayable.poll_id = polls.id " \
-                                     "INNER JOIN posts AS parent ON polls.status_message_id = parent.id"
-    migrate_signatures_for(:poll_participation, poll_participation_order_id, poll_participation_parent_join)
-  end
-
-  def migrate_signatures_for(relayable_type, order_id, parent_join)
-    execute "INSERT INTO #{relayable_type}_signatures (#{relayable_type}_id, signature_order_id, author_signature) " \
-            "SELECT relayable.id, #{order_id}, relayable.author_signature FROM #{relayable_type}s AS relayable " \
-            "INNER JOIN people AS author ON relayable.author_id = author.id " \
-            "#{parent_join} INNER JOIN people AS parent_author ON parent.author_id = parent_author.id " \
-            "WHERE author.owner_id IS NULL AND parent_author.owner_id IS NOT NULL AND relayable.author_signature IS NOT NULL"
-  end
-
-  def restore_signatures(relayable_type)
-    if AppConfig.postgres?
-      execute "UPDATE #{relayable_type}s SET author_signature = #{relayable_type}_signatures.author_signature " \
-              "FROM #{relayable_type}_signatures " \
-              "WHERE #{relayable_type}s.id = #{relayable_type}_signatures.#{relayable_type}_id "
-    else
-      execute "UPDATE #{relayable_type}s INNER JOIN #{relayable_type}_signatures " \
-              "ON #{relayable_type}s.id = #{relayable_type}_signatures.#{relayable_type}_id " \
-              "SET #{relayable_type}s.author_signature = #{relayable_type}_signatures.author_signature"
-    end
-  end
-end
diff --git a/db/migrate/20160802212635_cleanup_posts_table.rb b/db/migrate/20160802212635_cleanup_posts_table.rb
deleted file mode 100644
index ffab18c7d..000000000
--- a/db/migrate/20160802212635_cleanup_posts_table.rb
+++ /dev/null
@@ -1,30 +0,0 @@
-class CleanupPostsTable < ActiveRecord::Migration[4.2]
-  def change
-    remove_index :posts, column: %i(status_message_guid pending),
-                 name: :index_posts_on_status_message_guid_and_pending, length: {status_message_guid: 190}
-    remove_index :posts, column: :status_message_guid, name: :index_posts_on_status_message_guid, length: 191
-    remove_index :posts, column: %i(type pending id), name: :index_posts_on_type_and_pending_and_id
-
-    # from photos?
-    remove_column :posts, :pending, :boolean, default: false, null: false
-    remove_column :posts, :remote_photo_path, :text
-    remove_column :posts, :remote_photo_name, :string
-    remove_column :posts, :random_string, :string
-    remove_column :posts, :processed_image, :string
-    remove_column :posts, :unprocessed_image, :string
-    remove_column :posts, :status_message_guid, :string
-
-    # old cubbi.es stuff
-    remove_column :posts, :object_url, :string
-    remove_column :posts, :image_url, :string
-    remove_column :posts, :image_height, :integer
-    remove_column :posts, :image_width, :integer
-    remove_column :posts, :actor_url, :string
-    remove_column :posts, :objectId, :string
-
-    # old single post view templates
-    remove_column :posts, :frame_name, :string
-
-    add_index :posts, %i(id type), name: :index_posts_on_id_and_type
-  end
-end
diff --git a/db/migrate/20160807212443_participation_counter.rb b/db/migrate/20160807212443_participation_counter.rb
deleted file mode 100644
index 719458ec7..000000000
--- a/db/migrate/20160807212443_participation_counter.rb
+++ /dev/null
@@ -1,47 +0,0 @@
-class ParticipationCounter < ActiveRecord::Migration[4.2]
-  class Comment < ApplicationRecord
-  end
-
-  class Like < ApplicationRecord
-  end
-
-  class Participation < ApplicationRecord
-    belongs_to :author, class_name: "Person"
-  end
-
-  class Poll < ApplicationRecord
-  end
-
-  class PollParticipation < ApplicationRecord
-    belongs_to :poll
-  end
-
-  def up
-    return if ActiveRecord::SchemaMigration.where(version: "20150404193023").exists?
-
-    add_column :participations, :count, :integer, null: false, default: 1
-
-    likes_count = Like.select("COUNT(likes.id)")
-                      .where("likes.target_id = participations.target_id")
-                      .where("likes.author_id = participations.author_id")
-                      .to_sql
-    comments_count = Comment.select("COUNT(comments.id)")
-                            .where("comments.commentable_id = participations.target_id")
-                            .where("comments.author_id = participations.author_id")
-                            .to_sql
-    polls_count = PollParticipation.select("COUNT(*)")
-                                   .where("poll_participations.author_id = participations.author_id")
-                                   .joins(:poll)
-                                   .where("polls.status_message_id = participations.target_id")
-                                   .to_sql
-    Participation.joins(:author).where.not(people: {owner_id: nil})
-                 .update_all("count = (#{likes_count}) + (#{comments_count}) + (#{polls_count})")
-    Participation.where(count: 0).update_all(count: 1)
-  end
-
-  def down
-    remove_column :participations, :count
-
-    ActiveRecord::SchemaMigration.where(version: "20150404193023").delete_all
-  end
-end
diff --git a/db/migrate/20160810230114_cleanup_invitation_columns_from_users.rb b/db/migrate/20160810230114_cleanup_invitation_columns_from_users.rb
deleted file mode 100644
index 2022589fc..000000000
--- a/db/migrate/20160810230114_cleanup_invitation_columns_from_users.rb
+++ /dev/null
@@ -1,72 +0,0 @@
-class CleanupInvitationColumnsFromUsers < ActiveRecord::Migration[4.2]
-  class InvitationCode < ApplicationRecord
-  end
-
-  class User < ApplicationRecord
-  end
-
-  def change
-    remove_index :users, column: %i(invitation_service invitation_identifier),
-                 name: :index_users_on_invitation_service_and_invitation_identifier,
-                 unique: true, length: {invitation_service: 64}
-    remove_index :users, column: :invitation_token, name: :index_users_on_invitation_token
-    remove_index :users, column: :email, name: :index_users_on_email, length: 191
-
-    cleanup_invitations
-
-    remove_column :users, :invitation_token, :string, limit: 60
-    remove_column :users, :invitation_sent_at, :datetime
-    remove_column :users, :invitation_service, :string, limit: 127
-    remove_column :users, :invitation_identifier, :string, limit: 127
-    remove_column :users, :invitation_limit, :integer
-    remove_column :users, :invited_by_type, :string
-
-    add_index :users, :email, name: :index_users_on_email, unique: true, length: 191
-  end
-
-  def cleanup_invitations
-    reversible do |dir|
-      dir.up do
-        drop_table :invitations
-
-        # reset negative invitation counters
-        new_counter = AppConfig.settings.enable_registrations? ? AppConfig["settings.invitations.count"] : 0
-        InvitationCode.where("count < 0").update_all(count: new_counter)
-
-        # remove old invitation-users
-        User.where(username: nil).delete_all
-        change_column :users, :username, :string, null: false
-      end
-
-      dir.down do
-        change_column :users, :username, :string, null: true
-
-        create_invitations_table
-      end
-    end
-  end
-
-  def create_invitations_table
-    # rubocop:disable Layout/ExtraSpacing
-    create_table :invitations, force: :cascade do |t|
-      t.text     :message,      limit: 65_535
-      t.integer  :sender_id,    limit: 4
-      t.integer  :recipient_id, limit: 4
-      t.integer  :aspect_id,    limit: 4
-      t.datetime :created_at,                                 null: false
-      t.datetime :updated_at,                                 null: false
-      t.string   :service,      limit: 255
-      t.string   :identifier,   limit: 255
-      t.boolean  :admin,                      default: false
-      t.string   :language,     limit: 255,   default: "en"
-    end
-    # rubocop:enable Layout/ExtraSpacing
-
-    add_index :invitations, :aspect_id, name: :index_invitations_on_aspect_id, using: :btree
-    add_index :invitations, :recipient_id, name: :index_invitations_on_recipient_id, using: :btree
-    add_index :invitations, :sender_id, name: :index_invitations_on_sender_id, using: :btree
-
-    add_foreign_key :invitations, :users, column: :recipient_id, name: :invitations_recipient_id_fk, on_delete: :cascade
-    add_foreign_key :invitations, :users, column: :sender_id, name: :invitations_sender_id_fk, on_delete: :cascade
-  end
-end
diff --git a/db/migrate/20160813115514_remove_id_tokens.rb b/db/migrate/20160813115514_remove_id_tokens.rb
deleted file mode 100644
index 346b2a24b..000000000
--- a/db/migrate/20160813115514_remove_id_tokens.rb
+++ /dev/null
@@ -1,7 +0,0 @@
-require_relative "20150714055110_create_id_tokens"
-
-class RemoveIdTokens < ActiveRecord::Migration[4.2]
-  def change
-    revert CreateIdTokens
-  end
-end
diff --git a/db/migrate/20160822212739_remove_started_sharing_notifications_without_contact.rb b/db/migrate/20160822212739_remove_started_sharing_notifications_without_contact.rb
deleted file mode 100644
index ddd1f5b3a..000000000
--- a/db/migrate/20160822212739_remove_started_sharing_notifications_without_contact.rb
+++ /dev/null
@@ -1,13 +0,0 @@
-class RemoveStartedSharingNotificationsWithoutContact < ActiveRecord::Migration[4.2]
-  class Notification < ApplicationRecord
-  end
-
-  def up
-    Notification.where(type: "Notifications::StartedSharing", target_type: "Person")
-                .joins("INNER JOIN people ON people.id = notifications.target_id")
-                .joins("LEFT OUTER JOIN contacts ON contacts.person_id = people.id " \
-                       "AND contacts.user_id = notifications.recipient_id")
-                .where("contacts.id IS NULL")
-                .delete_all
-  end
-end