Symfony 表单验证错误显示两次

Question

我需要一个简单的用户注册表格。表单验证按预期工作，除了来自回调约束的验证错误由于某种原因显示两次。

我在错误消息中插入了一个随机数，以查看回调是否被调用了一次或两次。2 条错误消息显示相同的随机数，因此回调（可能）只调用一次。

任何帮助是极大的赞赏！

额外问题：“来自回调函数的所有错误都显示在表单中的同一位置（如预期）。是否（容易）指定应显示验证错误的字段？“

表单类型类如下所示：

class RegisterType extends AbstractType{

static private $em;
static private $translator;

public function __construct( EntityManager $em , TranslatorInterface $translator){
    RegisterType::$em = $em;
    RegisterType::$translator = $translator;
}

public function buildForm(FormBuilderInterface $builder , array $options){
    $builder
    ->add('email','email',[
            'attr'=>['placeholder'=>RegisterType::$translator->trans('your.email')],
            'label'=>false ,
            'constraints'=>[new NotBlank() , new Assert\Email()]])
            ->add('password','password',[
                    'attr'=>['placeholder'=>RegisterType::$translator->trans('your.password')],
                    'label'=>false ,
                    'constraints'=>[new NotBlank()]])
                    ->add('confirmPassword','password',[
                            'attr'=>['placeholder'=>RegisterType::$translator->trans('confirm.password')],
                            'label'=>false ,
                            'constraints'=>[new NotBlank()]]);
}

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

public function configureOptions( OptionsResolver $resolver)
{
    $resolver->setDefaults(array(
            'constraints' =>array( new Assert\Callback( array('AppBundle\Forms\Type\RegisterType','validateForm' )  )),
    ));
}

static public function validateForm(array $data, ExecutionContextInterface $context){
    if($data['email']){
        $user = RegisterType::$em->getRepository('AppBundle:User')->findByEmail($data['email']);
        if($user){
            $context->buildViolation('email.is.used'.rand())->addViolation();
        }
    }

    if($data['password'] && $data['confirmPassword']){
        if($data['password'] != $data['confirmPassword']){
            $context->buildViolation('password.confirm.failed')->addViolation();
        }
    }
}

该表单在控制器中调用如下：

        public function registerFormAction(Request $request){

        $form = $this->createForm('register');
        $form->handleRequest($request);

        if($form->isValid()){
            //TODO
        }

        return new JsonResponse(['success'=>false,
                                 'message'=>$this->renderView('AppBundle:Security:register.html.twig' , ['form'=>$form->createView()])
        ]);

    }

用于呈现表单的树枝模板是：

{% form_theme form _self %}
{%- block form_row -%}
    <div class = "form-group">
        {{- form_errors(form) -}}
        {{- form_widget(form) -}}
    </div>
{%- endblock form_row -%}
{{ form(form) }}

Answer 1

您正在显示表单错误和表单小部件两次！

你有

<div class = "form-group">
    {{- form_errors(form) -}}  //displays all form errors
    {{- form_widget(form) -}}  //displays all form widgets (not the labels!)
</div>

和

{{ form(form) }}  //displays the whole form

在你的代码中。

为什么不自己渲染表单，那么您还可以设置应显示表单错误的位置。

{{ form_start(form) }}
    <div class="form-group">
        {{ form_errors(form.username) }}  //errors for the "username" field of your form
        {{ form_label(form.username) }}   //labels for the "username" field of your form
        {{ form_widget(form.username) }}  //formfields for the "username" field of your form
    </div>
{{ form_end(form) }}

此外，还有一个 twig 函数被调用form_rest(form)，它将显示所有尚未手动渲染的表单字段！