puyopuyotetr.is/db/migrate/20220309213005_fix_reblog_deleted_at.rb

# frozen_string_literal: true

class FixReblogDeletedAt < ActiveRecord::Migration[6.1]
  disable_ddl_transaction!

  def up
    safety_assured do
      execute <<~SQL.squish
        UPDATE statuses s
        SET deleted_at = r.deleted_at
        FROM statuses r
        WHERE
          s.reblog_of_id = r.id
          AND r.deleted_at IS NOT NULL
      SQL
    end
  end

  def down; end
end