DB fix to work with existing entries

* added temp. default values for user_id and item_type
* changed model validation for item_type

app/models/report.rb

@@ -1,7 +1,8 @@
 class Report < ActiveRecord::Base
   validates :user_id, presence: true
   validates :item_id, presence: true
-  validates :item_type, presence: true
+  validates :item_type, presence: true, :inclusion => { :in => %w(post comment),
+    :message => 'Type should match `post` or `comment`!'}
   validates :text, presence: true
 
   validate :entry_does_not_exist, :on => :create

db/migrate/20140121132816_add_post_type_to_post_report.rb

@@ -1,5 +1,6 @@
 class AddPostTypeToPostReport < ActiveRecord::Migration
   def change
-    add_column :post_reports, :post_type, :string, :null => false, :after => :post_id
+    add_column :post_reports, :post_type, :string, :null => false, :after => :post_id, :default => 'post'
+    change_column_default :post_reports, :post_type, nil
   end
 end

db/migrate/20140422134627_change_user_id_type_to_integer.rb

@@ -1,9 +1,12 @@
 class ChangeUserIdTypeToInteger < ActiveRecord::Migration
   def up
-    change_column :reports, :user_id, :integer
+    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
-    change_column :reports, :user_id, :string
+    remove_column :reports, :user_id
+    add_column :reports, :user_id, :string
   end
 end

db/schema.rb

@@ -402,11 +402,11 @@ ActiveRecord::Schema.define(:version => 20140422134627) do
   create_table "reports", :force => true do |t|
     t.integer  "item_id",                       :null => false
     t.string   "item_type",                     :null => false
-    t.integer  "user_id"
     t.boolean  "reviewed",   :default => false
     t.text     "text"
     t.datetime "created_at",                    :null => false
     t.datetime "updated_at",                    :null => false
+    t.integer  "user_id",                       :null => false
   end
 
   add_index "reports", ["item_id"], :name => "index_post_reports_on_post_id"