php - 在 Sonata Admin Bundle 中注入(inject)容器服务的正确方法

Question

我试图在我的 Sonata Admin 类中注入(inject) service container，以便在 configureFormFields 方法中使用它。这是我的:

config.yml(奏鸣曲服务定义)

services:
  tan.product.admin.product:
    class: Tan\ProductBundle\Admin\ProductAdmin
    tags:
      - { name: sonata.admin, manager_type: orm, group: Product, label: Product }
    arguments: [ null, Tan\ProductBundle\Entity\Product, @service_container]

ProductAdmin.php

class ProductAdmin extends Admin
{

    /** @var \Symfony\Component\DependencyInjection\ContainerInterface */
    private $container;
    public $supportsPreviewMode = true;

    /**
     * @param string $code
     * @param string $class
     * @param string $baseControllerName
     */
    public function __construct($code, $class, $baseControllerName, $container = null)
    {
        parent::__construct($code, $class, $baseControllerName);
        $this->container = $container;
    }

    // other methods 

    protected function configureFormFields(FormMapper $form)
    {

        $helper = $this->container->get('oneup_uploader.templating.uploader_helper');
        $endpoint = $helper->endpoint('products');

        $form
                ->add('product_name', null, array('label' => 'Nombre'))
                ->add('product_description', null, array('label' => 'Descripción'));
    }

}

但是我收到了这个错误:

ContextErrorException: Catchable Fatal Error: Object of class appDevDebugProjectContainer could not be converted to string in /var/www/html/tan/var/cache/dev/classes.php line 12979

这是怎么回事？

Answer 1

由于您的构造函数有 4 个参数，其中第 4 个参数是服务容器，因此您需要传入第 4 个服务容器:

services:
  tan.product.admin.product:
  class: Tan\ProductBundle\Admin\ProductAdmin
  tags:
      - { name: sonata.admin, manager_type: orm, group: Product, label: Product }
  arguments: [ null, Tan\ProductBundle\Entity\Product, null, @service_container]