title: Select column from Mongodb in golang using mgo
body: <p>As I know, we can use</p>
  
  <pre><code>&gt; db['twitter-3'].find({}, {"text": 1})
  </code></pre>
  
  <p>to select all texts in collection.</p>
  
  <p>How can we use mgo to find specific field in golang?
  I tried </p>
  
  <pre><code>var result []string
  err = conn.Find(bson.M{}, bson.M{"text", 1}).All(&amp;result)
  </code></pre>
  
  <p>But it is not correct.</p>