title: mongoose - 'save' method does not exist
body: <p>Consider a mongodb collection running on MongooseJS.</p>
  
  <h2>Sample Code:</h2>
  
  <pre><code>Person.where('uid').equals(19524121).select('name').exec(function(err, data){
       // Here I can get the data correctly in an array.
       console.log(JSON.stringify(data)); 
       data[0].name = "try to save me now"; // Select the first item in the array
       data[0].save(); // Object #&lt;Promise&gt; has no method 'save'.
  }
  </code></pre>
  
  <h2>Error - Cant seem to figure out a way to fix this.</h2>
  
  <blockquote>
    <p>Object #&lt;Promise&gt; has no method 'save';</p>
  </blockquote>
  
  <p>I am a little confused on why this is happening and I have researched quite a bit and can't seem to find a direct answer for this.</p>