Php Symfony 4收集式变压器。如何在文本字段中优雅地显示值？
我和symfony 4一起工作。我有很多关系（令人惊讶的是，与问题无关）都有一个连接表。假设实体A可以有许多实体B，反之亦然。我们也假设A拥有B 我构建了一个如下所示的表单：Php Symfony 4收集式变压器。如何在文本字段中优雅地显示值？,php,symfony,symfony4,Php,Symfony,Symfony4,我和symfony 4一起工作。我有很多关系（令人惊讶的是，与问题无关）都有一个连接表。假设实体A可以有许多实体B，反之亦然。我们也假设A拥有B 我构建了一个如下所示的表单： $builder ->add('B', TextType::class, [ 'invalid_message' => 'Some invalid message', 'attr' => [ 'class' => 'tags',
$builder
->add('B', TextType::class, [
'invalid_message' => 'Some invalid message',
'attr' => [
'class' => 'tags',
]
])
->add('save', SubmitType::class);
$builder->get('B')
->addModelTransformer($this->transformer)
;
<div class="form-group"><label for="admin_video_tags" class="required">Tags</label><input type="text" id="admin_video_tags" name="admin_video[tags]" required="required" class="tags form-control ui-autocomplete-input" value="[{"name":"tag_ 6","id":47},{"name":"tag_ 7","id":48},{"name":"tag_ 16","id":57}]" autocomplete="off"></div>
public function transform($bunchOfB_s)
{
// returns json_encode
}
public function reverseTransform($bunchOfB_s)
{
// json_decode and transform to B entity
}
$builder
->add('B', TextType::class, [
'invalid_message' => 'Some invalid message',
'attr' => [
'class' => 'tags',
]
])
->add('save', SubmitType::class);
$builder->get('B')
->addModelTransformer($this->transformer)
;
<div class="form-group"><label for="admin_video_tags" class="required">Tags</label><input type="text" id="admin_video_tags" name="admin_video[tags]" required="required" class="tags form-control ui-autocomplete-input" value="[{"name":"tag_ 6","id":47},{"name":"tag_ 7","id":48},{"name":"tag_ 16","id":57}]" autocomplete="off"></div>
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老实说，我不知道是什么。我希望更了解symfony 4的人能伸出援助之手。这并不是您想要的，但它是一个更优雅的解决方案，使用复选框或选择一个输入选择多个
BBuse App\Entity\B;
use Doctrine\ORM\EntityRepository;
use Symfony\Bridge\Doctrine\Form\Type\EntityType;
// ...
$builder->add('B', EntityType::class, [
// looks for choices from this entity
'class' => B::class,
// function to get the B's you want as choices
'query_builder' => function (EntityRepository $er) {
return $er->createQueryBuilder('b')
->orderBy('b.name', 'ASC');
},
// uses the B.name property as the visible option string
'choice_label' => 'name',
// used to render a select box, check boxes or radios
// both true for checkboxes
'multiple' => true,
'expanded' => true,
// for select
'expanded' => false,
]);
BTextType:：classBCollectionType:：classBaB