/** * Retrieve all the versions that have been migrated. * * @return array */ private function _getAllMigratedVersions() { // In Rails: // table = Arel::Table.new(schema_migrations_table_name) // Base.connection.select_values(table.project(table['version']).to_sql).map(&:to_i).sort $col = $this->_db->fetchCol("SELECT version FROM " . $this->_getMigrationTableName()); return $col; }