将 ContainerInterface 作为参数传递时出错答案

【问题标题】：Error passing ContainerInterface as a parameter将 ContainerInterface 作为参数传递时出错
【发布时间】：2014-02-18 09:56:25
【问题描述】：

为什么我在尝试获取 ContainerInterface 时收到此错误：

ERROR - exception 'ErrorException' with message 'Catchable Fatal Error: Argument 5 passed to Project\InvitationsBundle\Invitations::__construct() must implement interface Symfony\Component\DependencyInjection\ContainerInterface, none given, called in /www/project/app/cache/dev/appDevDebugProjectContainer.php on line 1709 and defined in /www/project/src/Project/InvitationsBundle/Invitations.php line 23'

并且在构造方法中添加ContainerInterface时出现错误：

<?php

namespace Pro\InvitationsBundle;

use Pro\CommunityBundle\Entity\Community;
use Pro\InvitationsBundle\Entity\Invitation;
use Doctrine\Bundle\DoctrineBundle\Registry;
use Symfony\Component\Translation\TranslatorInterface;
use Symfony\Bundle\FrameworkBundle\Templating\EngineInterface;
use Pro\UserBundle\Entity\User;
use Symfony\Component\DependencyInjection\ContainerInterface;

class Invitations
{
    private $mailer;
    private $translator;
    private $templating;
    private $doctrine;
    private $container;


    function __construct(\Swift_Mailer $mailer, TranslatorInterface $translator, EngineInterface $templating,
        Registry $doctrine, ContainerInterface $container)
    {
        $this->mailer = $mailer;
        $this->translator = $translator;
        $this->templating = $templating;
        $this->doctrine = $doctrine;
        $this->container = $container;
    }
    ...
}

【问题讨论】：

请告诉我您的服务定义。
是的，我认为这就是问题所在。我已经定义了下一个参数：[@mailer, @translator, @templating, @doctrine]

标签： php symfony service containers

【解决方案1】：

您可能有错误的服务定义。您应该注入所有 Invitations 参数，例如：

invitations:
    class: Redconvive\InvitationsBundle\Invitations
    arguments: [@mailer, @translator, @templating, @doctrine, @service_container]

您可能忘记了 @service_container。

顺便说一句。请注意，注入整个容器是个坏主意。您应该只注入必要的服务。

【讨论】：