Question

我有两个实体学生和课程，我想创建一个表单，显示学生详细信息和课程的下拉列表/ chocelist，并为学生分配一个课程。这些类也应来自DB表，因此控制器就是这样。

public function studentAddClassAction( $id, Request $request )
{
    // get the student from the student table
    $em     = $this->getDoctrine()->getManager();
    $student= $em->getRepository('PIE10Bundle:Student')->find($id);

    // new class object and create the form
    $class  = new Classes;
    $form   = $this->createForm(ClassesType::class, $class);
    $form->handleRequest($request);

    if( $form->isSubmitted() && $form->isValid() )
    {
        // form operation - update student row with the classID
    }

    return $this->render(
                        'PIE10Bundle:student:layout_student_addclass.html.twig',
                        array(
                            'student'=> $student,
                            'title'  => 'Add Class',
                            'tables' => 1,
                            'form'   => $form->createView()
                        )
    );
}

和我的 ClassesType 如下所示

class ClassesType extends AbstractType
{
    public function buildForm(FormBuilderInterface $builder, array $options)
    {
        $builder->add('classes',
                      ClassesType::class,
                      array(
                            'class'     => 'PIE10Bundle:Classes',
                            'property'  => 'className',
                            'expanded'  => false,
                            'multiple'  => false
                    ));
        $builder->add('Add Class',
                      SubmitType::class,
                      array('attr'  =>  array('class' => 'btn btn-primary',
                                              'style' => 'margin:15px 0;')) );
    }

    public function configureOptions(OptionsResolver $resolver)
    {
        $resolver->setDefaults(array(
            'data_class' => 'PIE10Bundle\Entity\Classes',

        ));
    }
}

当我尝试访问此表单时，我收到以下 500内部服务器错误 - UndefinedOptionsException 错误

选项＆＃34; class＆＃34;，＆＃34;扩展＆＃34;，＆＃34;多个＆＃34;，＆＃34;属性＆＃34;不存在。定义的选项包括：＆＃34;操作＆＃34;，＆＃34; allow_extra_fields＆＃34;，＆＃34; attr＆＃34;，＆＃34; auto_initialize＆＃34;，＆＃34; block_name＆＃34;，＆＃34; by_reference＆＃34;，＆＃34;复合＆＃34;，＆＃34;约束＆＃34;，＆＃34; csrf_field_name＆＃34;，＆＃34; csrf_message＆＃34;，＆＃34; csrf_protection＆＃ 34;，＆＃34; csrf_token_id＆＃34;，＆＃34; csrf_token_manager＆＃34;，＆＃34; data＆＃34;，＆＃34; data_class＆＃34;，＆＃34; description＆＃34;，＆＃ 34;禁用＆＃34;，＆＃34; empty_data＆＃34;，＆＃34; error_bubbling＆＃34;，＆＃34; error_mapping＆＃34;，＆＃34; extra_fields_message＆＃34;，＆＃34; inherit_data＆＃34 ;，＆＃34; invalid_message＆＃34;，＆＃34; invalid_message_parameters＆＃34;，＆＃34; label＆＃34;，＆＃34; label_attr＆＃34;，＆＃34; label_format＆＃34;，＆＃34 ;映射＆＃34;，＆＃34;方法＆＃34;，＆＃34; post_max_size_message＆＃34;，＆＃34; property_path＆＃34;，＆＃34; required＆＃34;，＆＃34; translation_domain＆＃34; ，＆＃34; trim＆＃34;，＆＃34; validation_groups＆＃34;。

所以我需要知道出了什么问题以及如何解决这个问题。如果需要任何其他信息，请告诉我。感谢

Answer 1

在@echo %%A | find /i "\"更改：

ClassesType

为：

$builder->add('classes', ClassesType::class, ...

还添加：

$builder->add('classes', EntityType::class, ...

位于文件顶部，以供其使用。

目前您正在使用use Symfony\Bridge\Doctrine\Form\Type\EntityType;本身（如果不是错误，可能会导致无限循环）。此类型不会延伸ClassesType，因此您使用的选项（EntityType，class，expanded，multiple）不存在。

同样不推荐property，您应该使用property，除非您使用的是相当旧版本的symfony。

参考：EntityType Field

Answer 2

使用@Yoshi回答我改变了

$builder->add('classes', ClassesType::class, ...

到

$builder->add('classes', EntityType::class, ...

并添加了

use Symfony\Bridge\Doctrine\Form\Type\EntityType;到 ClassesType 文件，然后更新控制器，如下所示

public function studentAddClassAction( $id, Request $request )
{
    // get the student from the student table
    $em     = $this->getDoctrine()->getManager();
    $student= $em->getRepository('PIE10Bundle:Student')->find($id);

    // new class object and create the form
    $class  = $em->getRepository('PIE10Bundle:Classes')->findAll();
    $form   = $this->createForm(ClassesType::class, $class);
    $form->handleRequest($request);

    if( $form->isSubmitted() && $form->isValid() )
    {
        // form operation - update student row with the classID
    }

    return $this->render(
                        'PIE10Bundle:student:layout_student_addclass.html.twig',
                        array(
                            'student'=> $student,
                            'title'  => 'Add Class',
                            'tables' => 1,
                            'form'   => $form->createView()
                        )
    );
}

然后 ClassesType 如下

class ClassesType extends AbstractType
{
    public function buildForm(FormBuilderInterface $builder, array $options)
    {
        $builder->add('classes',
                      EntityType::class,
                      array(
                            'class'     => 'PIE10Bundle:Classes',
                            'expanded'  => false,
                            'multiple'  => false
                    ));
        $builder->add('Add Class',
                      SubmitType::class,
                      array('attr'  =>  array('class' => 'btn btn-primary',
                                              'style' => 'margin:15px 0;')) );
    }
}

@Yoshi回答帮我解决了错误

symfony 3 UndefinedOptionsException - 从数据库下拉列表

2 个答案: