如何访问Symfony FormType中的其他服务？

Question

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

谢谢!

Answer 1

作为基于之前答案/评论的完整答案:

要从您的表单类型访问服务,您必须:

1)将您的表单类型定义为服务,并将所需的服务注入其中:

# 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)现在在表单类型类中,将其注入构造函数:

// 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();
        // ...
    }
}

Answer 2

只需通过构造函数将您想要的服务注入到表单类型中即可。

class FooType extends AbstractType
{
    protected $barService;

    public function __construct(BarService $barService)
    {
        $this->barService = $barService;
    }

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