php - Symfony 4 - KnpPaginator Bundle "service not found, even though it exists in app' s 容器”

Question

我一直在学习教程，并且所有说明都显示它是以完全相同的方式完成的，但它似乎在 Symfony 4 中不起作用。是否有我忽略的东西或者 bundle 根本不兼容？

我跑了:composer require knplabs/knp-paginator-bundle

感谢 Flex，它自动加载到 bundles.php 中。

将以下内容插入 config/services.yaml:

knp_paginator:
    page_range:                 5          # default page range used in pagination control
    default_options:
        page_name:              page       # page query parameter name
        sort_field_name:        sort       # sort field query parameter name
        sort_direction_name:    direction  # sort direction query parameter name
        distinct:               true       # ensure distinct results, useful when ORM queries are using GROUP BY statements
    template:
        pagination: KnpPaginatorBundle:Pagination:twitter_bootstrap_v3_pagination.html.twig     # sliding pagination controls template
        sortable: KnpPaginatorBundle:Pagination:sortable_link.html.twig                         # sort link template

尝试在 Controller 中使用以下内容:

$paginator  = $this->get('knp_paginator');

出现以下错误:

Service "knp_paginator" not found: even though it exists in the app's container, the container inside "App\Controller\PhotoController" is a smaller service locator that only knows about the "doctrine", "form.factory", "http_kernel", "request_stack", "router", "security.authorization_checker", "security.token_storage", "serializer", "session" and "twig" services. Unless you need extra laziness, try using dependency injection instead. Otherwise, you need to declare it using "PhotoController::getSubscribedServices()".

Answer 1

您必须扩展 Controller 而不是 AbstractController 类:

use Symfony\Bundle\FrameworkBundle\Controller\Controller;

class MyController extends Controller
{

    public function myAction()
    {
        $paginator  = $this->get('knp_paginator');

或者最好离开 AbstractController 并将 knp_paginator 服务注入(inject)到您的操作中:

use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
use Knp\Component\Pager\PaginatorInterface;

class MyController extends AbstractController
{

    public function myAction(PaginatorInterface $paginator)
    {
        $paginator->paginate()...
    }