这是我第一次使用表单的 EventListener,所以我正在努力研究如何在其中注入(inject) EntityManager。
我有一个名为 UserType
的 formType,在这个类中我有一个 EventSubscriber AddDepartmentDegreeCourseFieldSubscriber
需要访问 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'
));
}
}
这是我的services.yml
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
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
我知道这个错误是什么意思,但我认为我在 services.yml
中注册的服务应该注入(inject) EntityManager
那么为什么我会收到这个错误?我在这里错过了什么?非常感谢任何帮助。
最佳答案
这是因为,您在构建表单时传递了 AddDepartmentDegreeCourseFieldSubscriber
的新实例。您需要从服务容器传递实例。
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 }
关于php - Symfony - 在表单的 EventSubscriber 中注入(inject)实体管理器,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/36541378/