Angular Ui-Grid Conditional CellTemplate
<p>I need to show a button in my ui-grid as long as the field value is NOT an empty string.  I tried using <code>ng-if</code> but it is not working.  Here is the code in my grid options:</p>

<pre><code>  { field: 'ReleaseStatus', 
    width: 125, 
    displayName: 'Release Status', 
    cellTemplate: 
    '&lt;div ng-if="row.entity.ReleaseStatus != """&gt;
        &lt;button id="editBtn" 
            type="button" 
            class="btn btn-default"  
            data-toggle="modal" 
            data-target="#myModal" 
            ng-click="grid.appScope.launch(row)"&gt;
            {{COL_FIELD}}
        &lt;/button&gt;
    &lt;/div&gt;'
   },
</code></pre>

<p>Without the <code>ng-if</code> the button displays and works great.  However, because some records have an empty string for the field ReleaseStatus, the button should not appear.</p>

<p>Any assistance is greatly appreciated.</p>