title: Mongo DB error: invalid operator: $search when doing $text search
body: <p>I've created an index with this:</p>
  
  <pre><code>db.MyCollection.ensureIndex({"field1": "text"})
  </code></pre>
  
  <p>and I'm running the following in Robomongo:</p>
  
  <pre><code>db.MyCollection.find({$text:{$search:"something"}})
  </code></pre>
  
  <p>and getting back this error:</p>
  
  <pre><code>error: { "$err" : "invalid operator: $search", "code" : 10068 }
  </code></pre>
  
  <p>The docs seem to be pretty clear that I'm using the correct syntax: <a href="http://docs.mongodb.org/manual/reference/operator/query/text/">http://docs.mongodb.org/manual/reference/operator/query/text/</a> . I'm using mongo version 2.4.9. Anyone know what the problem could be here?</p>