Question

I have 3 classes : Category, Parameter and Product.

Category has a one-to-many relationship with Parameters.
Product has a one-to-many relationship with Category.
Parameters are attributes for a product (color, weight, size, brand, etc.).

When I select a category and create a new product I want to create a form with these parameters. How can I do this? Is it possible with symfony form framework? I hope for your help.

我试图做这样的事情:

 class ProductRepository extends EntityRepository
{

    public function getParameters()
    {
        $em = $this->getEntityManager();
        $parameters = $em->getRepository( ShopProductBundle:CatParameter )->findAll();
        $data = array();
        foreach ($parameters as $k => $value) {
            $name = $value->getId();
            $data[$name] = array("label" => $value->getName());
        }
        return $data;
    }

}

表格

class ProductType extends AbstractType
{
    public function buildForm(FormBuilder $builder, array $options)
    {
        $builder->add( name ,  text , array( label  =>  Name ));
        $data = $options[ data ];
        foreach($data as $k => $item){
            $builder->add((string)$k,  text , array( label  => $item[ label ]));
        }
    }

    public function getName()
    {
        return  shop_productbundle_categorytype ;
    }

    public function getDefaultOptions(array $options){
        return array( data_class  =>  ShopProductBundleEntityProduct );
    }
}

形成行动:

$parameters = $em->getRepository( ShopProductBundle:Product )->getParameters();
$form = $this->createForm(new ProductType(), $parameters);

最终是例外:

Expected argument of type "ShopProductBundleEntityProduct", "array" given

Answer 1

I guess you re getting this exception because in your controller $parameters is not a product. You should build a new product, and add the parameters to it. Also please have a look to this article. It deals with a problem similar to yours.

Answer 2

一旦你以你的形式设置了数据级,你所能获取的唯一物体就是这种类型。

 data_class  =>  ShopProductBundleEntityProduct

The way I m adding multiple parameters to a product entity is a collection of form items: How to add collection of items

或者,你只是想通过这样的参数:

$parameters = $em->getRepository( ShopProductBundle:Product )->getParameters();
$form = $this->createForm(new ProductType(), null, $parameters);

或者,如果你希望有一个实体:

$form = $this->createForm(new ProductType(), new Product(), $parameters);

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