Pap_Api_Object::getPrimaryKeyFromFields PHP Method

        protected function getPrimaryKeyFromFields()
        {
            $request = $this->getGridRequest();
            if ($request == null) {
                throw new Exception("You have to set " . $this->getPrimaryKey() . " before calling load()!");
            }
            $this->fillFieldsToGridRequest($request);
            $request->setLimit(0, 1);
            $request->sendNow();
            $grid = $request->getGrid();
            if ($grid->getTotalCount() == 0) {
                throw new Exception("No rows found!");
            }
            if ($grid->getTotalCount() > 1) {
                throw new Exception("Too many rows found!");
            }
            $recordset = $grid->getRecordset();
            foreach ($recordset as $record) {
                $this->setField($this->getPrimaryKey(), $record->get($this->getPrimaryKey()));
                break;
            }
        }