这是原位形式：

<tr>
   <form method="post" action="{{ path('backend_course_row_update',{
 'courseeId' : course.id,'id' : row.id }) }}" novalidate>
     {{ form_widget(form.channel) }}
     {{ form_widget(form.name) }}
     {% for size in form.sizes %}
        {{ form_row(size) }}
     {% endfor %}
     {{ form_row(form._token) }}
     <td align="right" style="width: 140px;">
         <button class="btn btn-primary" type="submit">
            <i class="glyphicon glyphicon-save"></i>Save
         </button>
     </td>
  </form>
</tr>

这里的“表单”是一个CourseGuideRowType,如下所示：

/**
 * {@inheritdoc}
 */
public function buildForm(FormBuilderInterface $builder,array $options)
{
    $builder
        ->add('channel','channel_choice',array(
            'required'    => false
        ))
        ->add('name','text')
        ->add('sizes','course_guide_row_sizes',array('numColumns' => $options['numColumns']))
    ;
}

CourseGuideRowSizesType然后如下所示：

/**
 * {@inheritdoc}
 */
public function buildForm(FormBuilderInterface $builder,array $options)
{
    for ($i = 0; $i < $options['numColumns']; $i++) {
        $builder->add($i,'text',array('required' => 'false'));
    }
    $builder->addEventListener(
        FormEvents::PRE_SUBMIT,function (FormEvent $event) use ($options) {
            $form = $event->getForm();
            for ($i = 0; $i < $options['numColumns']; $i++) {
                if (empty($form->get($i)->getData())) {
                    $form->remove($i,'text');
                }
            }
        }
    );
}

但是,当我提交表单并转储出这样的错误时：

$form-> submit($request,！$request-> isMethod(‘PATCH’)) – > getErrors()

我明白了：

"This form should not contain extra fields."
      #messageParameters: array:1 [▼
        "{{ extra_fields }}" => "0","1","2","3","4","5"
      ]
        -extraData: array:6 [▼
          0 => "36"
          1 => "38"
          2 => "40"
          3 => "42"
          4 => "44"
          5 => "46"
        ]

“额外数据”是“大小”字段.

我在这里做了一些明显的错误吗？

编辑2017年6月：您现在可以使用’allow_extra_fields’来抑制此错误. http://symfony.com/doc/current/reference/forms/types/form.html#allow-extra-fields