Symfony 2.7无法使用doctrine命令

Question

好的，这让我走到了边缘......所以我开始了新的Symfony 2.7项目。然后我继续进行配置，然后进行数据库设置，这是我每次输入app/console doctrine命令时都会遇到的问题我得到了这个错误：

PHP Fatal error:  Class 'Doctrine\Common\Annotations\AnnotationRegistry' not found in /Users/Tomazi/Dev/symfony2test/app/autoload.php on line 11
PHP Stack trace:
PHP   1. {main}() /Users/Tomazi/Dev/symfony2test/app/console:0
PHP   2. require_once() /Users/Tomazi/Dev/symfony2test/app/console:10
PHP   3. require_once() /Users/Tomazi/Dev/symfony2test/app/bootstrap.php.cache:5

Fatal error: Class 'Doctrine\Common\Annotations\AnnotationRegistry' not found in /Users/Tomazi/Dev/symfony2test/app/autoload.php on line 11

Call Stack:
    0.0010     224456   1. {main}() /Users/Tomazi/Dev/symfony2test/app/console:0
    0.0184     406824   2. require_once('/Users/Tomazi/Dev/symfony2test/app/bootstrap.php.cache') /Users/Tomazi/Dev/symfony2test/app/console:10
    0.0187     407592   3. require_once('/Users/Tomazi/Dev/symfony2test/app/autoload.php') /Users/Tomazi/Dev/symfony2test/app/bootstrap.php.cache:5

查看错误我理解app / autoloader.php中缺少Doctrine\Common\Annotations\AnnotationRegistry？

autoloader.php：

<?php

use Doctrine\Common\Annotations\AnnotationRegistry;
use Composer\Autoload\ClassLoader;

/**
 * @var ClassLoader $loader
 */
$loader = require __DIR__.'/../vendor/autoload.php';

AnnotationRegistry::registerLoader(array($loader, 'loadClass'));

return $loader;

在我的自动加载器中，所谓的缺失类与namespac一起使用......

导致此错误的原因是什么......？