Symfony cannot load mongodb/driver
<p>I'm trying to implement doctrine ODM. I'm taking baby steps but I keep hitting roadblocks. This is one of the many roadblocks so far: </p>

<pre><code>PHP Fatal error:  Uncaught Symfony\Component\Debug\Exception\ClassNotFoundException: Attempted to load class "Manager" from namespace "MongoDB\Driver".
</code></pre>

<p>When I do this:</p>

<pre><code>use MongoDB\Driver\Manager;    
$manager = new Manager("mongodb://10.0.2.2:27017");
$servers = $manager-&gt;getServers();
var_dump($servers);
</code></pre>

<p>I'm requiring </p>

<blockquote>
  <p>"alcaeus/mongo-php-adapter": "^1.0",</p>
</blockquote>

<p>which in turns require </p>

<blockquote>
  <p>"mongodb/mongodb": "^1.0.1"</p>
</blockquote>

<p>Is there something I'm missing or that I'm not getting about the whole setup?</p>