Question

我对Symfony2中的服务和表单有疑问，所以我创建了我的calss表单，我希望添加一个多选城市列表，然后我想从另一个类“city”获取城市列表，所以我怎么称呼我的班级“城市”在我的表格中使用“服务”来获取功能“getcities”来返回我的城市列表？（我不在这里使用Doctrine）......

修改

 namespace Acme\DemoBundle\Form\Type;

 use Symfony\Component\Form\AbstractType;
 use Symfony\Component\OptionsResolver\OptionsResolverInterface;

class CityType extends AbstractType
{ 
public function setDefaultOptions(OptionsResolverInterface $resolver)
{
    $resolver->setDefaults(array(
        'choices' => array( /**
                     * Here I will call function getcities(return list of cities)
                      */

        )
    ));
}

public function getParent()
{
    return 'choice';
}

public function getName()
{
    return 'gender';
}
}

class City.php：

Class City {

  /**
   * here i will get list of cities 
   */


  public function getcities()
  {
     .....
    return $Listcities;
  }

  }

所以我想用“Service”来调用函数“getcities”吗？

Answer 1

表单对象不是容器感知的...至少，它们并不意味着。也就是说，您的控制器应该使用该服务来获取城市，然后它应该通过构造函数或方法将该列表传递给表单对象。

控制器：

class SomethingController
{
    public function someAction()
    {
        ...
        $cities = $this->get("citiesService")->getCities();
        $form = $this->createForm(new SomeType($cities), $someEntity);
        ...
    }
}

形式：

class SomeType extends AbstractType
{
    private $cities;

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

    public function buildForm(FormBuilder $builder, array $options)
    {
        // Now you have access to $this->cities, so you can use it to build the form
    }
}

Answer 2

您可以将City对象设置为表单数据对象吗？

所以它看起来像......

$form = $this->createForm(new SomeType(), new City());

class SomeType extends AbstractType
{ 
    public buildForm(FormBuilderInterface $builder, array $options)
    {
        $formFactory = $builder->getFormFactory();

        $builder->addEventListener(
            FormsEvents::PRE_SET_DATA,
            function (FormEvent $event) use ($formFactory) {
                $event->getForm()->add(
                    $formFactory->createNamed(
                        'gender',
                        'choice',
                        null,
                        array(
                            'choices' => $event->getData()->getCites()
                        )
                    )
                );
            }
        );
    }
}

使用Form中的服务调用类

2 个答案: