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[英]Catchable Fatal Error: Argument 1 passed to Controller::__construct() must be an instance of Doctrine\ORM\EntityManager, none given, called
[英]Catchable Fatal Error: Argument 1 passed to AppBundle\Form\TagType::__construct() must be an instance of Doctrine\ORM\EntityRepository, none given,
我正在使用EntityType
字段创建多选下拉列表。 我也想根据用户输入(例如standard
)查询可用选项,然后显示这些选项。 为此,我试图将EntityRepository注入我的TagType表单本身,以便可以使用它的CreateQueryBuilder
。 但是我得到这个错误-
这是我的代码TagType.php
:
<?php
namespace AppBundle\Form;
use Symfony\Component\Form\AbstractType;
use Symfony\Component\Form\FormBuilderInterface;
use Symfony\Component\OptionsResolver\OptionsResolver;
use Doctrine\ORM\EntityRepository;
use Symfony\Bridge\Doctrine\Form\Type\EntityType;
class TagType extends AbstractType {
protected $er;
public function __construct(EntityRepository $er)
{
$this->er = $er;
}
private function getTagsByCategoryName($categoryname, $er) {
return $er->createQueryBuilder('t')
->innerJoin('t.categories', 'c', 'WITH', 'c.categoryname = :categoryname')
->setParameter('categoryname', $categoryname)
->orderBy('t.id', 'ASC');
}
public function buildForm(FormBuilderInterface $builder, array $options) {
$builder->add('tagname', EntityType::class, array(
'class' => 'AppBundle:Tag',
'choices' => $this->getTagsByCategoryName('standard'),
'choice_label' => 'tagname',
'expanded' => false,
'multiple' => true,
'label' => 'Choose Tags',
));
}
public function configureOptions(OptionsResolver $resolver) {
$resolver->setDefaults(array(
'data_class' => 'AppBundle\Entity\Tag',
'tags' => null,
));
}
}
有任何想法吗?
2个答案:
您无需将EntityRepository
注入到Form中即可使用EntityType
query_builder
选项。 EntityType
将代表您注入EntityRepository
,您只需要定义一个以EntityRepository
作为参数的方法即可。 知道这一点:
class TagType extends AbstractType { private function getTagsByCategoryName($categoryname) { return function(EntityRepository $er) { return $er->createQueryBuilder('t') ->innerJoin('t.categories', 'c', 'WITH', 'c.categoryname = :categoryname') ->setParameter('categoryname', $categoryname) ->orderBy('t.id', 'ASC'); } } public function buildForm(FormBuilderInterface $builder, array $options) { $builder->add('tagname', EntityType::class, array( 'class' => 'AppBundle:Tag', 'choices' => $this->getTagsByCategoryName('standard'), 'choice_label' => 'tagname', 'expanded' => false, 'multiple' => true, 'label' => 'Choose Tags', )); } public function configureOptions(OptionsResolver $resolver) { $resolver->setDefaults(array( 'data_class' => 'AppBundle\\Entity\\Tag', 'tags' => null, )); } }
应该足够了。
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