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问题

我使用了这个解决方案https://stackoverflow.com/a/15167450/2910183，但是当我尝试打开管理仪表板 ( http://localhost/app_dev.php/admin/dashboard) 时出现以下错误。清理缓存后也会发生这种情况。

ClassNotFoundException：尝试从 ~/htdocs/symfony2training/app/cache/dev/appDevDebugProjectContainer.php 第 2216 行中的命名空间“Acme\ProductBundle\Block”加载类“AcmeBlockService”。您需要从另一个命名空间“使用”它吗？

有谁知道问题出在哪里？

代码

这是我的一部分app/config/config.yml

sonata_block:
    default_contexts: [cms]
    blocks:
        sonata.admin.block.admin_list:
            contexts:   [admin]
        sonata.user.block.menu:     # used to display the menu in profile pages
        sonata.user.block.account:  # used to display menu option (login option)
        acme.block.products:

sonata_admin:
    dashboard:
        blocks:
            # display a dashboard block
            - { position: left, type: acme.block.products }
            - { position: left, type: sonata.admin.block.admin_list }

我的一部分src/Acme/ProductBundle/Resources/config/services.yml

services:
    acme.block.products:
        id: acme.block.products
        class: Acme\ProductBundle\Block\ProductsBlockService
        arguments:
            - { name: service, id: templating }
        tags:
            - { name: sonata.block }

我的src/Acme/ProductBundle/Document/Products.php文件在：

<?php
namespace Acme\ProductBundle\Block;
use Symfony\Component\HttpFoundation\Response;
use Symfony\Component\OptionsResolver\OptionsResolverInterface;
use Sonata\BlockBundle\Model\BlockInterface;
use Sonata\BlockBundle\Block\BlockContextInterface;
use Sonata\AdminBundle\Form\FormMapper;
use Sonata\AdminBundle\Validator\ErrorElement;
class ProductsBlockService extends BaseBlockService {
    public function getName() {
        return 'Products';
    }
    public function getDefaultSettings() {
        return array();
    }
    public function validateBlock(ErrorElement $errorElement, BlockInterface $block) {
    }
    public function buildEditForm(FormMapper $formMapper, BlockInterface $block) {
    }
    public function execute(BlockInterface $block, Response $response = null) {
        $settings = array_merge($this->getDefaultSettings(), $block->getSettings());
        return $this->renderResponse('AcmeProductBundle:Block:admin_products.html.twig', array(
                'block' => $block,
                'settings' => $settings
        ), $response);
    }
}

解决方案

  1. 我查看了另一个块 ( vendor/sonata-project/user-bundle/Sonata/UserBundle/Block/AccountBlockService.php)，我意识到它的文件名就像类名。所以我src/Acme/ProductBundle/Document/Products.php改为src/Acme/ProductBundle/Document/ProductsBlockService.php
  2. 它有效，但出现了另一个错误：

    FatalErrorException：编译错误：Acme\ProductBundle\Block\ProductsBlockService::execute() 的声明必须与 Sonata\BlockBundle\Block\BlockServiceInterface::execute(Sonata\BlockBundle\Block\BlockContextInterface $blockContext, Symfony\Component\HttpFoundation\响应 $response = NULL) 在 ~/htdocs/symfony2training/src/Acme/ProductBundle/Block/ProductsBlockService.php 行 0

  3. 解决方法写在错误信息中：Acme\ProductBundle\Block\ProductsBlockService::execute() must be compatible with Sonata\BlockBundle\Block\BlockServiceInterface::execute()。所以我查看了我的助手（来自 1. 的AccountBlockService.php），比较execute()方法并编写我自己的解决方案。

所以最后我的src/Acme/ProductBundle/Document/ProductsBlockService.php文件如下所示。

<?php
namespace Acme\ProductBundle\Block;
use Sonata\AdminBundle\Form\FormMapper;
use Sonata\AdminBundle\Validator\ErrorElement;
use Sonata\BlockBundle\Block\BaseBlockService;
use Sonata\BlockBundle\Block\BlockContextInterface;
use Sonata\BlockBundle\Model\BlockInterface;
use Sonata\UserBundle\Menu\ProfileMenuBuilder;
use Sonata\UserBundle\Model\UserInterface;
use Symfony\Bundle\FrameworkBundle\Templating\EngineInterface;
use Symfony\Component\HttpFoundation\Response;
use Symfony\Component\OptionsResolver\OptionsResolverInterface;
use Symfony\Component\Security\Core\SecurityContextInterface;
class ProductsBlockService extends BaseBlockService {
    public function getName() {
        return 'Products';
    }
    public function validateBlock(ErrorElement $errorElement, BlockInterface $block) {
    }
    public function buildEditForm(FormMapper $formMapper, BlockInterface $block) {
    }
    public function setDefaultSettings(OptionsResolverInterface $resolver) {
        $resolver->setDefaults(array(
            'template' => 'AcmeProductBundle:Block:admin_products.html.twig',
            'ttl' => 0
        ));
    }
    public function execute(BlockContextInterface $blockContext, Response $response = null) {
        return $this->renderPrivateResponse($blockContext->getTemplate(), array(
                'block' => $blockContext->getBlock(),
                'context' => $blockContext,
            ), $response);
    }
}
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