Symfony2 - 数组到字符串转换错误

时间:2013-06-26 08:21:21

标签: forms symfony roles

我已经阅读了其他主题,但它并没有解决我的问题:

我有这个

->add('role', 'choice', array(
                'label' => 'I am:',
                'mapped' => true,
                'expanded' => true,
                'multiple' => false,
                'choices' => array(
                    'ROLE_NORMAL' => 'Standard',
                    'ROLE_VIP' => 'VIP',
                ) 
            ))

无论我做什么,我都会收到这个错误:

Notice: Array to string conversion in C:\xampp\htdocs\xxx\vendor\symfony\symfony  \src\Symfony\Component\Form\Extension\Core\ChoiceList\ChoiceList.php line 458 

在我的表单类型中,甚至没有调用setRole方法(当我将它重命名为某些垃圾时,仍然会发生错误)。为什么会这样?

//编辑

完整堆栈跟踪:

in C:\xampp\htdocs\xxx\vendor\symfony\symfony\src\Symfony\Component\Form\Extension\Core\ChoiceList\ChoiceList.php at line 458  -

     */
    protected function fixIndex($index)
    {
        if (is_bool($index) || (string) (int) $index === (string) $index) {
            return (int) $index;
        }

    at ErrorHandler ->handle ('8', 'Array to string conversion', 'C:\xampp\htdocs     \xxx\vendor\symfony\symfony\src\Symfony\Component\Form\Extension\Core\ChoiceList\ChoiceList.php', '458', array('index' => array()))
in C:\xampp\htdocs\xxx\vendor\symfony\symfony\src\Symfony\Component\Form\Extension\Core\ChoiceList\ChoiceList.php at line 458  +
at ChoiceList ->fixIndex (array())
in C:\xampp\htdocs\xxx\vendor\symfony\symfony\src\Symfony\Component\Form\Extension\Core\ChoiceList\ChoiceList.php at line 476  +
at ChoiceList ->fixIndices (array(array()))
in C:\xampp\htdocs\xxx\vendor\symfony\symfony\src\Symfony\Component\Form\Extension\Core\ChoiceList\SimpleChoiceList.php at line 152  +
at SimpleChoiceList ->fixChoices (array(array()))
in C:\xampp\htdocs\xxx\vendor\symfony\symfony\src\Symfony\Component\Form\Extension\Core\ChoiceList\ChoiceList.php at line 204  +
at ChoiceList ->getIndicesForChoices (array(array()))
in C:\xampp\htdocs\xxx\vendor\symfony\symfony\src\Symfony\Component\Form\Extension\Core\DataTransformer\ChoiceToBooleanArrayTransformer.php at line 63  +
at ChoiceToBooleanArrayTransformer ->transform (array())
in C:\xampp\htdocs\xxx\vendor\symfony\symfony\src\Symfony\Component\Form\Form.php at line 1019  +
at Form ->normToView (array())
in C:\xampp\htdocs\xxx\vendor\symfony\symfony\src\Symfony\Component\Form\Form.php at line 332  +
at Form ->setData (array())
in C:\xampp\htdocs\xxx\vendor\symfony\symfony\src\Symfony\Component\Form\Extension\Core\DataMapper\PropertyPathMapper.php at line 59  +
at PropertyPathMapper ->mapDataToForms (object(User), object(RecursiveIteratorIterator))
in C:\xampp\htdocs\xxx\vendor\symfony\symfony\src\Symfony\Component\Form\Form.php at line 375  +
at Form ->setData (object(User))
in C:\xampp\htdocs\xxx\vendor\friendsofsymfony\user-bundle\FOS\UserBundle\Controller\RegistrationController.php at line 49  +
at RegistrationController ->registerAction (object(Request))
at call_user_func_array (array(object(RegistrationController), 'registerAction'), array(object(Request)))
in C:\xampp\htdocs\xxx\app\bootstrap.php.cache at line 2770  +
at HttpKernel ->handleRaw (object(Request), '1')
in C:\xampp\htdocs\xxx\app\bootstrap.php.cache at line 2744  +
at HttpKernel ->handle (object(Request), '1', true)
in C:\xampp\htdocs\xxx\app\bootstrap.php.cache at line 2874  +
at ContainerAwareHttpKernel ->handle (object(Request), '1', true)
in C:\xampp\htdocs\xxx\app\bootstrap.php.cache at line 2175  +
at Kernel ->handle (object(Request))
in C:\xampp\htdocs\xxx\web\app_dev.php at line 29  +

4 个答案:

答案 0 :(得分:33)

Symfony试图将你的$ role(数组属性)转换为而不是多个选择字段(字符串)。

有几种方法可以解决这个问题:

  1. 在您选择的表单小部件中将 多个 设置为 true
  2. 数组 的映射更改为 $ role $ role 属性 实体。
  3. 如果您坚持让上述选项保持不变,则可以创建DataTransformer。 这不是最佳解决方案,因为如果您的数组有超过1个元素丢失数据。
  4. 示例:

    <?php
    namespace Acme\DemoBundle\Form\DataTransformer;
    
    use Symfony\Component\Form\DataTransformerInterface;
    use Symfony\Component\Form\Exception\TransformationFailedException;
    
    class StringToArrayTransformer implements DataTransformerInterface
    {
        /**
         * Transforms an array to a string. 
         * POSSIBLE LOSS OF DATA
         *
         * @return string
         */
        public function transform($array)
        {
            return $array[0];
        }
    
        /**
         * Transforms a string to an array.
         *
         * @param  string $string
         *
         * @return array
         */
        public function reverseTransform($string)
        {
            return array($string);
        }
    }
    

    然后在你的表单类中:

    use Acme\DemoBundle\Form\DataTransformer\StringToArrayTransformer;
    /* ... */
    $transformer = new StringToArrayTransformer();
    $builder->add($builder->create('role', 'choice', array(
                    'label' => 'I am:',
                    'mapped' => true,
                    'expanded' => true,
                    'multiple' => false,
                    'choices' => array(
                        'ROLE_NORMAL' => 'Standard',
                        'ROLE_VIP' => 'VIP',
                    )
                  ))->addModelTransformer($transformer));
    

    您可以在此处详细了解DataTransformers:http://symfony.com/doc/current/cookbook/form/data_transformers.html

答案 1 :(得分:2)

确保在ORM文件中使用正确的数据类型。在这种情况下,您的角色字段不能是字符串。它必须是多对多关系,数组或json_array。

如果您选择其中之一,symfony将毫不费力地插入数据或任何类型的变压器。

E.g:

// Resources/config/User.orm.yml
fields:
  role:
      type: array
      nullable: false

因此,它将存在于您的数据库中,如:

a:2:{i:0;s:4:"user";i:1;s:5:"admin";}

答案 2 :(得分:1)

我只是在不更改我的角色属性的数组类型的情况下添加DataTransformer然后将其放在我的UserType中:

use AppBundle\Form\DataTransformer\StringToArrayTransformer;

//...

$transformer = new StringToArrayTransformer();    
$builder->get('roles')->addModelTransformer($transformer);

它对我有用。

答案 3 :(得分:0)

我有你的问题..我用这个解决方案解决了这个问题。我希望它可以帮到你

此代码工作在登录和注册表单...

用户实体

class User {
    /**
     * @ORM\Column(type="array")
     */
    private $roles ;

    public function getRoles()
    {
        $roles = $this->roles;
         var_dump($roles);
        if ($roles != NULL) {
            return explode(" ",$roles);
        }else {
           return $this->roles;
        }
    }


  public function setRoles($roles)
    {
        $this->roles = $roles;
    }

用户类型

 ->add('roles', ChoiceType::class, array(
            'attr' => array(
                'class' => 'form-control',
                'value' => $options[0]['roles'],
                'required' => false,
            ),
            'multiple' => true,
            'expanded' => true, // render check-boxes
            'choices' => [
                'admin' => 'ROLE_ADMIN',
                'user' => 'ROLE_USER',
            ]
        ))