id = $dto->replacementId . '_' . $dto->classId . '_' . $dto->subjectId; $resource->replacementId = $dto->replacementId; $resource->replacedTeacherId = $dto->replacedTeacherId; $resource->classId = $dto->classId; $resource->subjectId = $dto->subjectId; $resource->className = $dto->className; $resource->subjectName = $dto->subjectName; $resource->startDate = $dto->startDate->format('Y-m-d'); $resource->endDate = $dto->endDate->format('Y-m-d'); return $resource; } }