ParamConverter Symfony 中的集合

问题描述

我试图创建一个有效负载，其中一个字段是另一个对象的集合。所以我创造了这样的东西。

use DateTimeInterface;
use JMS\Serializer\Annotation as Serializer;
use Symfony\Component\Validator\Constraints as Assert;
use Symfony\Component\Validator\Constraints\Collection;

class MyPayload
{

    /**
     * @var int
     *
     * @Serializer\Type("int")
     * @Assert\Positive()
     */
    private int $someNumber;

    /**
     * @var DateTimeInterface
     *
     * @Serializer\Type("DateTime<'Y-m-d'>")
     */
    private DateTimeInterface $someDate;

    /**
     * @Assert\Collection(
     *              fields={
     *                  "label"=@Assert\NotBlank(),*                  "someNumber2"=@Assert\Positive(),*              }
     *          )
     */
    private Collection $someCollection;
}

我正在通过邮递员发送类似的内容（some_collection 中的元素数量未知，可以是 1 可以是 10）：

{
    "some_number": 123,"some_date": "2021-01-01","some_collection": [
        {
            "label": "test1","some_number2": 10000
        },{
            "label": "test2","some_number2": 15000
        }
    ]
}

我的控制器看起来像这样：

    /**
     * @param MyPayload                  $myPayload
     * @param ConstraintViolationListInterface $validationErrors
     *
     * @return JsonResponse
     * @ParamConverter("myPayload",converter="fos_rest.request_body",*                                    class="App\Request\Payload\MyPayload")
     *
     */
    public function doSomething(
        ContractPayload $myPayload,ConstraintViolationListInterface $validationErrors
    ): JsonResponse {
        try {
            if (count($validationErrors) > 0) {
                throw new ValidationException($validationErrors);
            }
    ...
}

我唯一的回答是：

'contractRate' - This value should be of type array|(Traversable&ArrayAccess).

我一直在寻找解决方案，但找不到任何可行的解决方案，您知道该怎么做才能使其发挥作用吗？

解决方法

您的问题正是在于您传递给函数的类型，您传递的是 ContractPayload 而不是 MyPayload， 突然之间，与 MyPayload 类型上的集合相比，您会遇到序列化的另一个问题。

• 首先为集合创建一个新类型，它很有用，而不是任何类型的集合

    <?php
  
    namespace App\Request\Payload;
  
  
    use JMS\Serializer\Annotation as Serializer;
    use Symfony\Component\Validator\Constraints as Assert;
  
    class SomeItem
    {
        /**
         * @Assert\NotBlank()
         * @Serializer\Type("string")
         */
        private $label;
  
        /**
         * @Assert\Positive()
         * @Serializer\Type("int")
         */
        private $someNumber2;
  
  
        /**
         * @return string
         */
        public function getLabel():string
        {
            return $this->label;
        }
  
        /**
         * @param string $label
         */
        public function setLabel(string $label)
        {
            $this->label = $label;
        }
  
        /**
         * @return int
         */
        public function getSomeNumber2():int
        {
            return $this->someNumber2;
        }
  
        /**
         * @param mixed $someNumber2
         */
        public function setSomeNumber2(int $someNumber2)
        {
            $this->someNumber2 = $someNumber2;
        }
  
  
  
    }
  

• 对 MyPayload 稍作改动

  <?php
  
    namespace App\Request\Payload; 
    use DateTimeInterface;
    use JMS\Serializer\Annotation as Serializer;
    use Symfony\Component\Validator\Constraints as Assert;
    use Symfony\Component\Validator\Constraints\Collection;
  
    class MyPayload
    {
  
         /**
         * @var int
         *
         * @Serializer\Type("int")
         * @Assert\Positive()
         */
        private int $someNumber;
  
        /**
         * @var DateTimeInterface
         *
         * @Serializer\Type("DateTime<'Y-m-d'>")
         */
        private DateTimeInterface $someDate;
  
        /**
         * @Serializer\Type("ArrayCollection<App\Request\Payload\SomeItem>")
         */
        private Collection $someCollection;
  
  
  
        public function getSomeNumber():int
        {
            return $this->someNumber;
        }
  
  
        /**
         * @param int $someNumber
         */
        public function setSomeNumber(int $someNumber)
        {
            $this->someNumber = $someNumber;
        }
  
        /**
         * @return DateTimeInterface
         */
        public function getSomeDate():DateTimeInterface
        {
            return $this->someDate;
        }
  
        /**
         * @param DateTimeInterface $someDate
         */
        public function setSomeDate(DateTimeInterface $someDate)
        {
            $this->someDate = $someDate;
        }
  
        /**
         * @return mixed
         */
        public function getSomeCollection():Collection
        {
            return $this->someCollection;
        }
  
  
        // todo implmentation of add remove someItem  ...;)
  
  
  
    }
  

• 上次更改，控制器 使用 App\Request\Payload\MyPayload； // ..

     /**
     * @param MyPayload                  $myPayload
     * @param ConstraintViolationListInterface $validationErrors
     *
     * @return JsonResponse
     * @ParamConverter("myPayload",converter="fos_rest.request_body",class="App\Request\Payload\MyPayload")
     *
     */
    public function doSomething(MyPayload $myPayload,ConstraintViolationListInterface $validationErrors): JsonResponse {
        try {
            if (count($validationErrors) > 0) {
                throw new ValidationException($validationErrors);
            }
    ...
  }