fix(datepicker): Parse date from $viewValue instead of $modelValue

Allow use in conjunction with an ngModelController that has custom formatters and parsers to translate between $modelValue and $viewValue

src/datepicker/datepicker.js

@@ -63,8 +63,8 @@ angular.module('ui.bootstrap.datepicker', ['ui.bootstrap.dateparser', 'ui.bootst
   };
 
   this.render = function() {
-    if ( ngModelCtrl.$modelValue ) {
-      var date = new Date( ngModelCtrl.$modelValue ),
+    if ( ngModelCtrl.$viewValue ) {
+      var date = new Date( ngModelCtrl.$viewValue ),
           isValid = !isNaN(date);
 
       if ( isValid ) {
@@ -81,13 +81,13 @@ angular.module('ui.bootstrap.datepicker', ['ui.bootstrap.dateparser', 'ui.bootst
     if ( this.element ) {
       this._refreshView();
 
-      var date = ngModelCtrl.$modelValue ? new Date(ngModelCtrl.$modelValue) : null;
+      var date = ngModelCtrl.$viewValue ? new Date(ngModelCtrl.$viewValue) : null;
       ngModelCtrl.$setValidity('date-disabled', !date || (this.element && !this.isDisabled(date)));
     }
   };
 
   this.createDateObject = function(date, format) {
-    var model = ngModelCtrl.$modelValue ? new Date(ngModelCtrl.$modelValue) : null;
+    var model = ngModelCtrl.$viewValue ? new Date(ngModelCtrl.$viewValue) : null;
     return {
       date: date,
       label: dateFilter(date, format),
@@ -112,7 +112,7 @@ angular.module('ui.bootstrap.datepicker', ['ui.bootstrap.dateparser', 'ui.bootst
 
   $scope.select = function( date ) {
     if ( $scope.datepickerMode === self.minMode ) {
-      var dt = ngModelCtrl.$modelValue ? new Date( ngModelCtrl.$modelValue ) : new Date(0, 0, 0, 0, 0, 0, 0);
+      var dt = ngModelCtrl.$viewValue ? new Date( ngModelCtrl.$viewValue ) : new Date(0, 0, 0, 0, 0, 0, 0);
       dt.setFullYear( date.getFullYear(), date.getMonth(), date.getDate() );
       ngModelCtrl.$setViewValue( dt );
       ngModelCtrl.$render();

src/datepicker/test/datepicker.spec.js

@@ -6,6 +6,26 @@ describe('datepicker directive', function () {
   beforeEach(module('template/datepicker/month.html'));
   beforeEach(module('template/datepicker/year.html'));
   beforeEach(module('template/datepicker/popup.html'));
+  beforeEach(module(function($compileProvider) {
+    $compileProvider.directive('dateModel', function() {
+      return {
+        restrict: 'A',
+        require: 'ngModel',
+        link: function(scope, element, attrs, modelController) {
+          modelController.$formatters.push(function(object) {
+            return new Date(object.date);
+          });
+
+          modelController.$parsers.push(function(date) {
+            return {
+              type: 'date',
+              date: date.toUTCString()
+            };
+          });
+        }
+      };
+    });
+  }));
   beforeEach(inject(function(_$compile_, _$rootScope_) {
     $compile = _$compile_;
     $rootScope = _$rootScope_;
@@ -1732,4 +1752,30 @@ describe('datepicker directive', function () {
       expect(getTitle()).toBe('2013');
     });
   });
+
+  describe('with an ngModelController having formatters and parsers', function() {
+    beforeEach(inject(function() {
+      // Custom date object.
+      $rootScope.date = { type: 'date', date: 'April 1, 2015 00:00:00' };
+
+      // Use dateModel directive to add formatters and parsers to the
+      // ngModelController that translate the custom date object.
+      element = $compile('<datepicker ng-model="date" date-model></datepicker>')($rootScope);
+      $rootScope.$digest();
+    }));
+
+    it('updates the view', function() {
+      $rootScope.date = { type: 'date', date: 'April 15, 2015 00:00:00' };
+      $rootScope.$digest();
+
+      expectSelectedElement(17);
+    });
+
+    it('updates the model', function() {
+      clickOption(17);
+
+      expect($rootScope.date.type).toEqual('date');
+      expect(new Date($rootScope.date.date)).toEqual(new Date('April 15, 2015 00:00:00'));
+    });
+  });
 });