symfony - 如何访问 Symfony FormType 中的其他服务？

Question

我尝试从由 AbstractType 扩展的 FormType 访问服务。我怎样才能做到这一点？

谢谢!

Answer 1

作为基于先前答案/评论的完整答案:

为了从您的表单类型访问服务，您必须:

1) Define your Form Type as a service并将所需的服务注入(inject)其中:

# src/AppBundle/Resources/config/services.yml
services:
    app.my.form.type:
        class: AppBundle\Form\MyFormType # this is your form type class
        arguments:
            - '@my.service' # this is the ID of the service you want to inject
        tags:
            - { name: form.type }

2)现在在您的表单类型类中，将其注入(inject)构造函数:

// src/AppBundle/Form/MyFormType.php
class MyFormType extends AbstractType
{
    protected $myService;

    public function __construct(MyServiceClass $myService)
    {
        $this->myService = $myService;
    }

    public function buildForm(FormBuilderInterface $builder, array $options)
    {
        $this->myService->someMethod();
        // ...
    }
}