class PopulateIssuesClosedOn < ActiveRecord::Migration[4.2] def up closed_status_ids = IssueStatus.where(:is_closed => true).pluck(:id) if closed_status_ids.any? # First set closed_on for issues that have been closed once closed_status_values = closed_status_ids.map {|status_id| "'#{status_id}'"}.join(',') subselect = "SELECT MAX(#{Journal.table_name}.created_on)" + " FROM #{Journal.table_name}, #{JournalDetail.table_name}" + " WHERE #{Journal.table_name}.id = #{JournalDetail.table_name}.journal_id" + " AND #{Journal.table_name}.journalized_type = 'Issue' AND #{Journal.table_name}.journalized_id = #{Issue.table_name}.id" + " AND #{JournalDetail.table_name}.property = 'attr' AND #{JournalDetail.table_name}.prop_key = 'status_id'" + " AND #{JournalDetail.table_name}.old_value NOT IN (#{closed_status_values})" + " AND #{JournalDetail.table_name}.value IN (#{closed_status_values})" Issue.update_all "closed_on = (#{subselect})" # Then set closed_on for closed issues that weren't up updated by the above UPDATE # No journal was found so we assume that they were closed on creation Issue.where({:status_id => closed_status_ids, :closed_on => nil}). update_all("closed_on = created_on") end end def down Issue.update_all :closed_on => nil end end