protected function getWhereClauseByFilter(Model_Data_Filter $filter) { $where = "1=1 "; $and = " AND "; $adapter = $this->getDbTable()->getAdapter(); if ($filter->getId()) { $where = $adapter->quoteInto(Model_DB_Data_Table::FIELDS_ID . " = ?", $filter->getId()); } else { $value = $filter->getIdRoad(); if (!empty($value)) { $where .= $and . $adapter->quoteInto(Model_DB_Data_Table::FIELDS_ID_ROAD_FK . " = ?", $value); } } return $where; }