The option “constraints” does not exist. Known options are: “action”,
“attr”,“auto_initialize”,“block_name”,“by_reference”,“compound”,
“csrf_field_name”,“csrf_message”,“csrf_protection”,“csrf_provider”,
“csrf_token_id”,“csrf_token_manager”,“data”,“data_class”,
“disabled”,“empty_data”,“error_bubbling”,“inherit_data”,
“intention”,“label”,“label_attr”,“label_format”,“mapped”,
“max_length”,“method”,“pattern”,“post_max_size_message”,
“property_path”,“read_only”,“required”,“translation_domain”,
“trim”,“virtual”.

class MessageType extends AbstractType
{
    public function buildForm(FormBuilderInterface $builder,array $options)
    {
        $builder
            ->add('sender','text',[
                'constraints' => [
                    new Constraints\NotBlank(),],])
            ->add('recipient','email')
            ->add('message','textarea');
    }

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

    public function setDefaultOptions(OptionsResolverInterface $resolver)
    {
        $collectionConstraint = new Constraints\Collection(array(
            'fields' => [
                'sender' => [
                    new Constraints\NotBlank(),new Constraints\Email(),'recipient' => [
                    new Constraints\NotBlank(),'message' => [
                    new Constraints\NotBlank(),));

        $resolver->setDefaults([
            'validation_constraints' => $collectionConstraint,]);
    }
}

仅使用setDefaultOptions不会显示错误,但它不起作用,不会验证字段.

可以看出,无论如何都试过了.我也尝试使用组件表单发件箱的文档,但得到相同的错误.

http://symfony.com/doc/current/components/form/introduction.html#form-validation

编辑

我也试过这种方式并得到同样的错误.

$form = $formFactory->createBuilder()
    ->add('task',array(
        'constraints' => new NotBlank(),))
    ->add('dueDate','date',array(
        'constraints' => array(
            new NotBlank(),new Type('\DateTime'),)
    ))
    ->getForm();