Symfony2 - 如何在控制器中使用@Entity注释？

Question

Symfony's manual on ParamConverter has this example:

/**
 * @Route("/blog/{post_id}")
 * @Entity("post", expr="repository.find(post_id)")
 */
public function showAction(Post $post)
{
}

Source: http://symfony.com/doc/current/bundles/SensioFrameworkExtraBundle/annotations/converters.html#fetch-via-an-expression

But using @Entity annotation gives me this error.

The annotation "@Entity" in method AppBundle\Controller\CurrencyController::currencyAction() was never imported. Did you maybe forget to add a "use" statement for this annotation?

Obviously, I need to use a namespace, but which one? Please help.

Answer 1

The Entity annotation only exist on master (or futur v4). Source file here

But as you can see, this is only a shortcut to @ParamConverter annotation with expr option, so you have to use this one until next release.

Best regards.

Answer 2

You are trying to use ParameterConverter so this syntax is just wrong.

Use this instead

use Sensio\Bundle\FrameworkExtraBundle\Configuration\Route;
use Sensio\Bundle\FrameworkExtraBundle\Configuration\ParamConverter;

/**
 * @Route("/blog/{post_id}")
 * @ParamConverter("post_id", class="VendorBundle:Post")
 */
public function showAction(Post $post)
{
}

VendorBundle:Post should be replaced with whatever your Vendor is (if any) and Bundle is.

Answer 3

Using annotation @ParamConverter with option repository_method is deprecated

The repository_method option of @ParamConverter is deprecated and will be removed in 6.0. Use the expr option or @Entity.

Thus it's better to use @Entity (documentation)

You have to add the namespace :

use Sensio\Bundle\FrameworkExtraBundle\Configuration\Entity;