如何使用原则(Symfony 4)将数据存储在数组集合中

Question

我的控制器：

            /**
            * @Route("/row/{slug}/{connect}/{field}/{productgroup}", name="row", methods={"POST"})
            */
            public function row($slug, $connect, $field,$productgroup, Request $request) {
              $EntityName = 'App\Entity\' . ucwords($slug);
              $con = 'App\Entity\' . ucwords($connect);
              $entity = $this->getDoctrine()->getRepository($EntityName)->findOneBy(['id' => $field]);
              $entityManager = $this->getDoctrine()->getManager();
              $argsId = $productgroup;
              $args = $entityManager->getReference($connect , $argsId);
              $entity->setProductgroup($args);
              $entityManager->flush();
              $response = new Response();
              $response->send();
              return $response;
            }

错误消息：

类"产品组"不存在

Answer 1

我不能告诉你为什么会出现类错误，但你不能将实体对象传递给需要 ArrayCollection 的方法，这里：

/* args is not an ArrayCollection */
$args = $entityManager->getReference($connect , $argsId);
$entity->setProductgroup($args); 

也许你应该使用 addProductgroup((。

如果 $argsId 是一个 id 数组，你应该获取每个 id 的引用，并将 ghost 对象添加到 ArrayCollection 中。

Answer 2

工作解决方案：

     /**
        * @Route("/row/{entity}/{relation}/{entity_id}/{relation_id}", name="row", methods={"POST"})
        */
        public function row($entity, $relation, $entity_id, $relation_id, Request $request) {
          $entity_name = 'App\Entity\' . ucwords($entity);
          $relation_name = 'App\Entity\' . ucwords($relation);
          $entityManager = $this->getDoctrine()->getManager();
          $enity_reference = $entityManager->getReference($entity_name, $entity_id);
          $relation_reference = $entityManager->getReference($relation_name, $relation_id);
          $func = 'add'.$relation;
          $enity_reference->$func($relation_reference);
          $entityManager->persist($enity_reference);
          $entityManager->persist($relation_reference);
          $entityManager->flush();
          $response = new Response();
          $response->send();
          return $response;
        }