这是我第一次使用表单的EventListener,所以我很难在其中注入EntityManager。
我有一个名为UserType
的formType,在这个类中我有一个子EventSubscriber AddDepartmentDegreeCourseFieldSubscriber
,它需要访问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' => 'AppBundleEntityUser'
));
}
}
这是我的services.yml
app.department_course_degree_subscriber:
class: AppBundleFormEventListenerAddDepartmentDegreeCourseFieldSubscriber
arguments: ["@doctrine.orm.entity_manager"]
tags:
- { name: kernel.event_subscriber }
我得到的错误如下
可捕获的致命错误:参数1传递给AppBundle\Form\EventListener\AddDepartmentDegree CourseFieldSubscriber::__construct()必须是Doctrine\ORM\EntityManager的实例,未给定,调用在/Users/shairyar/Sites/oxford portal/src/AppBundle/Form/UserType.php中在第21行并定义
我知道这个错误意味着什么,但我认为我在services.yml
中注册的服务应该注入EntityManager
,所以我为什么会出现这个错误?我在这里错过了什么?任何帮助都将不胜感激。
这是因为,在构建表单时传递AddDepartmentDegreeCourseFieldSubscriber
的新实例。您需要从服务容器传递实例。
use AppBundleFormEventListenerAddDepartmentDegreeCourseFieldSubscriber;
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: AppBundleFormEventListenerAddDepartmentDegreeCourseFieldSubscriber
arguments: ["@doctrine.orm.entity_manager"]
tags:
- { name: kernel.event_subscriber }
app.form.type.my_user_form:
class: AppBundleFormUserType
arguments: [ "@app.department_course_degree_subscriber" ]
tags:
- { name: form.type }