title: Select box is not displaying options in angular and material in source it showing up when i inspect element
body: <pre><code>&lt;div class="row"&gt;
      &lt;div class="input-field col m7 s12"&gt;
          &lt;label&gt;Venue&lt;/label&gt;
              &lt;input ng-model="event.venue" type="text"&gt;
      &lt;/div&gt;
      &lt;div class="input-field col m5 s12"&gt;
          &lt;select ng-model="event.cordinator" ng-options="cordinator._id as cordinator.name for cordinator in cordinators" class="validate"&gt;
  
         &lt;/select&gt;
     &lt;/div&gt;
  &lt;/div&gt;
  </code></pre>
  
  <p>Here is an image of a bigger section:</p>
  
  <p><a href="https://i.stack.imgur.com/SPkZo.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/SPkZo.jpg" alt="enter image description here"></a></p>