title: Symfony3 mongoDB configurtion
body: <p>I am working with symfony3 and trying to set up MongoDB. I am following the Symfony documentation <a href="http://symfony.com/doc/current/bundles/DoctrineMongoDBBundle/index.html" rel="nofollow">Symf Doc Mongo</a>.</p>
  
  <p>In Install the bundle with Composer section of this Doc its been suggested to install these two bundles:</p>
  
  <pre><code>        "doctrine/mongodb-odm": "~1.0",
      "doctrine/mongodb-odm-bundle": "~3.0"
  </code></pre>
  
  <p>I am trying to do just that and but when i composer update i get these errors:</p>
  
  <pre><code>Problem 1
  - doctrine/mongodb-odm 1.0.0 requires doctrine/mongodb ~1.2 -&gt; satisfiable by doctrine/mongodb[1.2.0, 1.2.1, 1.2.2, 1.3.0].
  - doctrine/mongodb-odm 1.0.1 requires doctrine/mongodb ~1.2 -&gt; satisfiable by doctrine/mongodb[1.2.0, 1.2.1, 1.2.2, 1.3.0].
  - doctrine/mongodb-odm 1.0.2 requires doctrine/mongodb ~1.2 -&gt; satisfiable by doctrine/mongodb[1.2.0, 1.2.1, 1.2.2, 1.3.0].
  - doctrine/mongodb-odm 1.0.3 requires doctrine/mongodb ~1.2 -&gt; satisfiable by doctrine/mongodb[1.2.0, 1.2.1, 1.2.2, 1.3.0].
  - doctrine/mongodb-odm 1.0.4 requires doctrine/mongodb ~1.2 -&gt; satisfiable by doctrine/mongodb[1.2.0, 1.2.1, 1.2.2, 1.3.0].
  - doctrine/mongodb-odm 1.0.5 requires doctrine/mongodb ~1.2 -&gt; satisfiable by doctrine/mongodb[1.2.0, 1.2.1, 1.2.2, 1.3.0].
  - doctrine/mongodb 1.3.0 requires ext-mongo ^1.5 -&gt; the requested PHP extension mongo is missing from your system.
  - doctrine/mongodb 1.2.2 requires ext-mongo ^1.2.12 -&gt; the requested PHP extension mongo is missing from your system.
  - doctrine/mongodb 1.2.1 requires ext-mongo ^1.2.12 -&gt; the requested PHP extension mongo is missing from your system.
  - doctrine/mongodb 1.2.0 requires ext-mongo ^1.2.12 -&gt; the requested PHP extension mongo is missing from your system.
  - Installation request for doctrine/mongodb-odm ~1.0 -&gt; satisfiable by doctrine/mongodb-odm[1.0.0, 1.0.1, 1.0.2, 1.0.3, 1.0.4, 1.0.5].
  </code></pre>
  
  <p>I dont understand where i should go from here.</p>