b3a9bf3925
* remove author_signature column * delete all self-participating participations * delete all participations where author and post-author are remote * delete all duplicate participations * delete all participations without post * create unique index
44 lines
2 KiB
Ruby
44 lines
2 KiB
Ruby
class CleanupParticipations < ActiveRecord::Migration
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class Participation < ActiveRecord::Base
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end
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def up
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remove_column :participations, :author_signature
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cleanup
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remove_index :participations, name: :index_participations_on_target_id_and_target_type_and_author_id
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add_index :participations, %i(target_id target_type author_id), unique: true
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end
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def down
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remove_index :participations, name: :index_participations_on_target_id_and_target_type_and_author_id
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add_index :participations, %i(target_id target_type author_id)
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add_column :participations, :author_signature, :text
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end
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private
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def cleanup
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self_where = "WHERE participations.target_type = 'Post' AND participations.target_id = posts.id AND " \
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"posts.author_id = participations.author_id"
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remote_where = "WHERE participations.target_type = 'Post' AND participations.target_id = posts.id AND " \
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"posts.author_id = post_author.id AND participations.author_id = author.id AND " \
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"author.owner_id is NULL AND post_author.owner_id is NULL"
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duplicate_where = "WHERE p1.author_id = p2.author_id AND p1.target_id = p2.target_id " \
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"AND p1.target_type = p2.target_type AND p1.id > p2.id"
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if AppConfig.postgres?
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execute "DELETE FROM participations USING posts #{self_where}"
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execute "DELETE FROM participations USING posts, people AS author, people AS post_author #{remote_where}"
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execute "DELETE FROM participations AS p1 USING participations AS p2 #{duplicate_where}"
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else
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execute "DELETE participations FROM participations, posts #{self_where}"
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execute "DELETE participations FROM participations, posts, people author, people post_author #{remote_where}"
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execute "DELETE p1 FROM participations p1, participations p2 #{duplicate_where}"
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end
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Participation.joins("LEFT OUTER JOIN posts ON posts.id = participations.target_id")
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.where(target_type: "Post").delete_all("posts.id is NULL")
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end
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end
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