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mastodon/db/post_migrate/20210808071221_clear_orphan...

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# frozen_string_literal: true
class ClearOrphanedAccountNotes < ActiveRecord::Migration[5.2]
class Account < ApplicationRecord
# Dummy class, to make migration possible across version changes
end
class AccountNote < ApplicationRecord
# Dummy class, to make migration possible across version changes
belongs_to :account
belongs_to :target_account, class_name: 'Account'
end
def up
AccountNote.where('NOT EXISTS (SELECT * FROM users u WHERE u.account_id = account_notes.account_id)').in_batches.delete_all
end
def down
# nothing to do
end
end