调用 isSumbitted() 和 isValid() 导致“未定义的方法"；错误 [英] Calls to isSumbitted() and isValid() result in "undefined method" error

问题描述

我有一个 Symfony 表单，它是从控制器中的 createFormBuilder() 创建的.但是在两个 IF 语句下，表单应该带有两个不同的字段集.我的 Symfony 版本是 3.4.

I have a Symfony form that is created from createFormBuilder() in the controller. But under two IF statements the form should carry two different set of fields. My Symfony version is 3.4.

/src/AppBundle/Controller/DefaultController.php

/src/AppBundle/Controller/DefaultController.php

例如:这是基本形式.

$form = $this->createFormBuilder()
    ->add('name', TextType::class, ['required' => true]])
    ->add('email', EmailType::class, ['required' => true]])
    ->getForm();

if ($form->isSubmitted() && $form->isValid()) {
        ...
        ...
        ...
}

现在，当条件成立时，我需要向这个基本表单添加更多字段.下面显示的是我所做的，它给了我一个错误.

Now I need to append few more fields to this basic form when a condition becomes true. Shown below is what I did and it gives me an error.

$form = $this->createFormBuilder()
        ->add('name', TextType::class, ['required' => true]])
        ->add('email', EmailType::class, ['equired' => true]]);

if($a==true){
    $form->add('username', TextType::class, ['required' => true]])
         ->add('password', PasswordType::class, ['required' => true]]);
}

$form->getForm();

if ($form->isSubmitted() && $form->isValid()) {
        ...
        ...
        ...
}

错误是:

试图调用类的名为isSubmitted"的未定义方法Symfony\Component\Form\FormBuilder".

Attempted to call an undefined method named "isSubmitted" of class "Symfony\Component\Form\FormBuilder".

我怎样才能做到这一点?在不同情况下在多个场合追加字段?

How can I get this done? Append fields at multiple occasions under different conditions?

推荐答案

尝试:

$formbuilder = $this->createFormBuilder()
        ->add('name', TextType::class, ['required' => true]])
        ->add('email', EmailType::class, ['equired' => true]]);

if($a==true){
    $formbuilder->add('username', TextType::class, ['required' => true]])
         ->add('password', PasswordType::class, ['required' => true]]);
}

$form = $formbuilder->getForm();

if ($form->isSubmitted() && $form->isValid()) {
        ...
        ...
        ...
}

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