title: Unable to fetch all fields from mongo document
body: <p>I want to fetch all the fields from a mongo document and also want to calculate the length of the specific document or document object.
  My mongo document looks like :-</p>
  
  <pre><code>{
      "_id" : ObjectId("58a80b0521fd923fd908a7f8"),
      "qus0" : "question 0",
      "qus0_count" : 0,
      "qus1" : "question 1",
      "qus1_count" : 0,
      "qus2" : "question 2",
      "qus2_count" : 0,
      "qus10" : "question 10",
      "qus10_count" : 0
  }
  </code></pre>
  
  <p>Now I am using query to fetch data and it gives me only: </p>
  
  <blockquote>
    <p><code>db.test.findOne({"_id": ObjectId("58a80b0521fd923fd908a7f8")});</code></p>
  </blockquote>
  
  <pre><code>{
      "_id" : ObjectId("58a80b0521fd923fd908a7f8"),
      "qus0_count" : 0,
      "qus1_count" : 0,
      "qus2_count" : 0,
      "qus10_count" : 0
  }
  </code></pre>
  
  <p>and I am expecting :-</p>
  
  <pre><code>{
      "_id" : ObjectId("58a80b0521fd923fd908a7f8"),
      "qus0" : "question 0",
      "qus0_count" : 0,
      "qus1" : "question 1",
      "qus1_count" : 0,
      "qus2" : "question 2",
      "qus2_count" : 0,
      "qus10" : "question 10",
      "qus10_count" : 0
  }
  </code></pre>
  
  <p>Any help will be appreciated. Thanks. </p>