title: Storing array with Doctrine and MongoDB
body: <p>How can I store an array with Doctrine and Mongo DB?</p>
  
  <p>I do not want reference document, only array.</p>
  
  <p>Example:</p>
  
  <pre><code>Type[ 
       Type1,
       Type2,
       Type3
  ]
  </code></pre>
  
  <p>Do I need to create new Doctrine ODM data type? </p>