fix(selectpicker) change value for track by ngOptions only

Author: joaoneto

demo/index.html

@@ -69,7 +69,7 @@ <h3>Works with ngDisable</h3>
                     <div>Enabled/Disabled <input type="checkbox" ng-model="selectWithNgDisabled"></div>
 
                     <div>
-                        <select id="selectVisible" ng-disabled="selectWithNgDisabled" selectpicker="{}" ng-model="model">
+                        <select id="selectVisible" ng-disabled="selectWithNgDisabled" selectpicker ng-model="model">
                             <option value="">Select one</option>
                             <option>Mustard</option>
                             <option>Ketchup</option>
@@ -117,6 +117,16 @@ <h3>Works with ngRepeat</h3>
             <!-- Styles -->
             <section id="simple-usage" ng-controller="StyleCtrl" dropdown-toggle>
                 <h1>Style usage</h1>
+                <div>
+                    <h3>Works with selectpicker style option</h3>
+                    <p>You can set different Bootstrap classes via the selectpicker style option</p>
+                    <select selectpicker="{style:'btn-info'}">
+                        <option value="">Select one</option>
+                        <option>Mustard</option>
+                        <option>Ketchup</option>
+                        <option>Relish</option>
+                    </select>
+                </div>
                 <div>
                     <h3>Works with data-style</h3>
                     <p>You can set different Bootstrap classes via the data-style attribute</p>
@@ -125,6 +135,19 @@ <h3>Works with data-style</h3>
                         <option value="info">btn-info</option>
                         <option value="success">btn-success</option>
                         <option value="danger">btn-danger</option>
+                        <option value="warning">btn-warning</option>
+                        <option value="inverse">btn-inverse</option>
+                    </select>
+                </div>
+                <div>
+                    <h3>Works with option data-content</h3>
+                    <select selectpicker="" ng-model="color">
+                        <option data-content="<span class='label label-primary'>btn-primary</span>" value="primary">btn-primary</option>
+                        <option data-content="<span class='label label-info'>btn-info</span>" value="info">btn-info</option>
+                        <option data-content="<span class='label label-success'>btn-success</span>" value="success">btn-success</option>
+                        <option data-content="<span class='label label-danger'>btn-danger</span>" value="danger">btn-danger</option>
+                        <option data-content="<span class='label label-warning'>btn-warning</span>" value="warning">btn-warning</option>
+                        <option data-content="<span class='label label-inverse'>btn-inverse</span>" value="inverse">btn-inverse</option>
                     </select>
                 </div>
             </section>

src/angular-bootstrap-select.js

@@ -181,7 +181,7 @@ function selectpickerDirective($parse) {
     link: function (scope, element, attrs) {
       function refresh(newVal) {
         scope.$applyAsync(function () {
-          if (!attrs.ngOptions || /track by/.test(attrs.ngOptions)) element.val(newVal);
+          if (attrs.ngOptions && /track by/.test(attrs.ngOptions)) element.val(newVal);
           element.selectpicker('refresh');
         });
       }