title: Mongo db - Querying nested array and objects
body: <p>I have the following document structure:</p>
  
  <pre><code>{
     "_id":"12345",
     "value":{
        "T":0,
        "v":[
           {
              "name":"JW",
              "cost":100
           }
        ]
     }
  }
  </code></pre>
  
  <p>How do I query the name key? I tried the dot notation but without luck (I think it works for only two levels)</p>