douqiao7958
2016-04-11 06:32
浏览 57
已采纳

Symfony - 在表单的EventSubscriber中注入实体管理器

This is the first time I am working with EventListener of a form so I am struggling on how to inject EntityManager in it.

I have this formType called UserType and in this class I have an EventSubscriber AddDepartmentDegreeCourseFieldSubscriber which needs access to EntityManager

class UserType extends AbstractType
{
    /**
     * @param FormBuilderInterface $builder
     * @param array $options
     */
    public function buildForm(FormBuilderInterface $builder, array $options)
    {
        $builder->addEventSubscriber(new AddProfileFieldSubscriber());
        $builder->addEventSubscriber(new AddDepartmentDegreeCourseFieldSubscriber());
    }

    /**
     * @param OptionsResolver $resolver
     */
    public function configureOptions(OptionsResolver $resolver)
    {
        $resolver->setDefaults(array(
            'data_class' => 'AppBundle\Entity\User'
        ));
    }
}

This is my services.yml

app.department_course_degree_subscriber:
    class: AppBundle\Form\EventListener\AddDepartmentDegreeCourseFieldSubscriber
    arguments: ["@doctrine.orm.entity_manager"]
    tags:
        - { name: kernel.event_subscriber }

The error I get is as following

Catchable Fatal Error: Argument 1 passed to AppBundle\Form\EventListener\AddDepartmentDegreeCourseFieldSubscriber::__construct() must be an instance of Doctrine\ORM\EntityManager, none given, called in /Users/shairyar/Sites/oxford-portal/src/AppBundle/Form/UserType.php on line 21 and defined

I know what the error means but I thought the service i registered in services.yml should inject the EntityManager so why I am getting this error? What am i missing here? Any help will be really appreciated.

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这是我第一次使用表单的EventListener，所以我在努力学习如何在其中注入EntityManager 。

我有一个名为 UserType 的formType，在这个类中我有一个需要访问EntityManager的EventSubscriber AddDepartmentDegreeCourseFieldSubscriber 

 类UserType扩展AbstractType 
 {
 / ** 
 * @param FormBuilderInterface $ builder 
 * @param array $ options 
 * / 
 n public function buildForm（FormBuilderInterface $  builder，array $ options）
 {
 $ builder-＆gt; addEventSubscriber（new AddProfileFieldSubscriber（））; 
 $ builder-＆gt; addEventSubscriber（new AddDepartmentDegreeCourseFieldSubscriber（））; 
} 
 
 / ** \  n * @param OptionsResolver $ resolver 
 * / 
公共函数configureOptions（OptionsResolver $ resolver）
 {
 $ resolver-＆gt; setDefaults（array（
'data_class'=＆gt;'AppBundle \ Entity \ Us 呃'
））; 
} 
} 
   
 
 
这是我的 services.yml   
 \  n 
  app.department_course_degree_subscriber：
 class：AppBundle \ Form \ EventListener \ AddDepartmentDegreeCourseFieldSubscriber 
 arguments：[“@ doctrine.orm.entity_manager”] 
 tags：
  -  {name：kernel.event_subscriber}  
   
 
 
我得到的错误如下： 
 
 
 
 
捕获致命错误：参数1传递给
  AppBundle \ Form \ EventListener \ AddDepartmentDegreeCourseFieldSubscriber :: __ construct（）
必须是Doctrine \ ORM \ EntityManager的实例，没有给出，在/ Users / shairyar / Sites / oxford-portal / src / AppBundle / Form / UserType中称为
  .php 
在第21行并定义了 
  
 
 
我知道错误意味着什么，但我认为我在 services.yml 中注册的服务 应该注入 EntityManager ，为什么我收到此错误？ 我在这里失踪了什么？ 任何帮助都将非常感激。
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1条回答 默认 最新

  • duanpo2037 2016-04-11 08:14
    已采纳

    It's because, you pass new instance of AddDepartmentDegreeCourseFieldSubscriber when building form. You need to pass instance from service container.

    use AppBundle\Form\EventListener\AddDepartmentDegreeCourseFieldSubscriber;

class UserType extends AbstractType
{
    private $addDepartmentDegreeCourseFieldSubscriber;

    public function __construct(AddDepartmentDegreeCourseFieldSubscriber $subscriber)
    {
        $this->addDepartmentDegreeCourseFieldSubscriber = $subscriber;
    }

    /**
     * @param FormBuilderInterface $builder
     * @param array $options
     */
    public function buildForm(FormBuilderInterface $builder, array $options)
    {
        $builder->addEventSubscriber($this->addDepartmentDegreeCourseFieldSubscriber);
    }
}

    # app/config/services.yml
services:
    app.department_course_degree_subscriber:
        class: AppBundle\Form\EventListener\AddDepartmentDegreeCourseFieldSubscriber
        arguments: ["@doctrine.orm.entity_manager"]
        tags:
            - { name: kernel.event_subscriber }

    app.form.type.my_user_form:
        class: AppBundle\Form\UserType
        arguments: [ "@app.department_course_degree_subscriber" ]
        tags:
            - { name: form.type }
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