discourse/app/models/post_revision.rb

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# frozen_string_literal: true
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class PostRevision < ActiveRecord::Base
belongs_to :post
belongs_to :user
serialize :modifications, Hash
after_create :create_notification
def self.ensure_consistency!
# 1 - fix the numbers
DB.exec <<-SQL
UPDATE post_revisions
SET number = pr.rank
FROM (SELECT id, 1 + ROW_NUMBER() OVER (PARTITION BY post_id ORDER BY number, created_at, updated_at) AS rank FROM post_revisions) AS pr
WHERE post_revisions.id = pr.id
AND post_revisions.number <> pr.rank
SQL
# 2 - fix the versions on the posts
DB.exec <<-SQL
UPDATE posts
SET version = 1 + (SELECT COUNT(*) FROM post_revisions WHERE post_id = posts.id),
public_version = 1 + (SELECT COUNT(*) FROM post_revisions pr WHERE post_id = posts.id AND pr.hidden = 'f')
WHERE version <> 1 + (SELECT COUNT(*) FROM post_revisions WHERE post_id = posts.id)
OR public_version <> 1 + (SELECT COUNT(*) FROM post_revisions pr WHERE post_id = posts.id AND pr.hidden = 'f')
SQL
end
def hide!
update_column(:hidden, true)
end
def show!
update_column(:hidden, false)
end
def create_notification
PostActionNotifier.after_create_post_revision(self)
end
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end
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# == Schema Information
#
# Table name: post_revisions
#
# id :integer not null, primary key
# user_id :integer
# post_id :integer
# modifications :text
# number :integer
# created_at :datetime not null
# updated_at :datetime not null
# hidden :boolean default(FALSE), not null
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#
# Indexes
#
# index_post_revisions_on_post_id (post_id)
# index_post_revisions_on_post_id_and_number (post_id,number)
#