fix(uiSelectMatch): set model value to null when cleared

Closes angular-ui#863

Author: Andrei Varabei

src/common.js

@@ -54,6 +54,10 @@ var KEY = {
     }
   };
 
+function isNil(value) {
+  return angular.isUndefined(value) || value === null;
+}
+
 /**
  * Add querySelectorAll() to jqLite.
  *

src/uiSelectController.js

@@ -62,7 +62,7 @@ uis.controller('uiSelectCtrl',
   }
 
   ctrl.isEmpty = function() {
-    return angular.isUndefined(ctrl.selected) || ctrl.selected === null || ctrl.selected === '' || (ctrl.multiple && ctrl.selected.length === 0);
+    return isNil(ctrl.selected) || ctrl.selected === '' || (ctrl.multiple && ctrl.selected.length === 0);
   };
 
   function _findIndex(collection, predicate, thisArg){
@@ -376,7 +376,7 @@ uis.controller('uiSelectCtrl',
 
   // When the user selects an item with ENTER or clicks the dropdown
   ctrl.select = function(item, skipFocusser, $event) {
-    if (item === undefined || !_isItemDisabled(item)) {
+    if (isNil(item) || !_isItemDisabled(item)) {
 
       if ( ! ctrl.items && ! ctrl.search && ! ctrl.tagging.isActivated) return;
 
@@ -451,7 +451,7 @@ uis.controller('uiSelectCtrl',
   };
 
   ctrl.clear = function($event) {
-    ctrl.select(undefined);
+    ctrl.select(null);
     $event.stopPropagation();
     $timeout(function() {
       ctrl.focusser[0].focus();

src/uiSelectMultipleDirective.js

@@ -162,7 +162,7 @@ uis.directive('uiSelectMultiple', ['uiSelectMinErr','$timeout', function(uiSelec
         // Make sure that model value is array
         if(!angular.isArray(ngModel.$viewValue)){
           // Have tolerance for null or undefined values
-          if(angular.isUndefined(ngModel.$viewValue) || ngModel.$viewValue === null){
+          if (isNil(ngModel.$viewValue)){
             ngModel.$viewValue = [];
           } else {
             throw uiSelectMinErr('multiarr', "Expected model value to be array but got '{0}'", ngModel.$viewValue);
@@ -178,7 +178,7 @@ uis.directive('uiSelectMultiple', ['uiSelectMinErr','$timeout', function(uiSelec
           return;
         }
         $select.selected.push(item);
-        var locals = {};        
+        var locals = {};
         locals[$select.parserResult.itemName] = item;
 
         $timeout(function(){
@@ -261,11 +261,11 @@ uis.directive('uiSelectMultiple', ['uiSelectMinErr','$timeout', function(uiSelec
                 } else {
                   return curr;
                 }
-                
+
               } else {
                 // If nothing yet selected, select last item
-                return last;  
-              }              
+                return last;
+              }
               break;
             case KEY.DELETE:
               // Remove selected item and select next item

src/uiSelectSingleDirective.js

@@ -9,6 +9,11 @@ uis.directive('uiSelectSingle', ['$timeout','$compile', function($timeout, $comp
 
       //From view --> model
       ngModel.$parsers.unshift(function (inputValue) {
+        // Keep original value for undefined and null
+        if (isNil(inputValue)) {
+          return inputValue;
+        }
+
         var locals = {},
             result;
         locals[$select.parserResult.itemName] = inputValue;
@@ -18,6 +23,11 @@ uis.directive('uiSelectSingle', ['$timeout','$compile', function($timeout, $comp
 
       //From model --> view
       ngModel.$formatters.unshift(function (inputValue) {
+        // Keep original value for undefined and null
+        if (isNil(inputValue)) {
+          return inputValue;
+        }
+
         var data = $select.parserResult && $select.parserResult.source (scope, { $select : {search:''}}), //Overwrite $search
             locals = {},
             result;
@@ -51,13 +61,13 @@ uis.directive('uiSelectSingle', ['$timeout','$compile', function($timeout, $comp
 
       scope.$on('uis:select', function (event, item) {
         $select.selected = item;
-        var locals = {};        
+        var locals = {};
         locals[$select.parserResult.itemName] = item;
 
-        $timeout(function(){
+        $timeout(function() {
           $select.onSelectCallback(scope, {
             $item: item,
-            $model: $select.parserResult.modelMapper(scope, locals)
+            $model: isNil(item) ? item : $select.parserResult.modelMapper(scope, locals);
           });
         });
       });

test/select.spec.js

@@ -15,6 +15,10 @@ describe('ui-select tests', function() {
     Escape: 27
   };
 
+  function isNil(value) {
+    return angular.isUndefined(value) || value === null;
+  }
+
   //create a directive that wraps ui-select
   angular.module('wrapperDirective',['ui.select']);
   angular.module('wrapperDirective').directive('wrapperUiSelect', function(){
@@ -50,9 +54,9 @@ describe('ui-select tests', function() {
       require: 'ngModel',
       link: function(scope, element, attrs, ngModel) {
         ngModel.$validators.testValidator = function(modelValue, viewValue) {
-          if(angular.isUndefined(modelValue) || modelValue === null) {
+          if (isNil(modelValue)) {
             return true;
-          } else if(angular.isArray(modelValue)) {
+          } else if (angular.isArray(modelValue)) {
             var allValid = true, idx = modelValue.length;
             while(idx-- > 0 && allValid) {
               allValid = allValid && modelValue[idx].valid;
@@ -552,13 +556,38 @@ describe('ui-select tests', function() {
 
     // Trigger clear.
     el.find('.select2-search-choice-close').click();
-    expect(scope.selection.selected).toEqual(undefined);
+    expect(scope.selection.selected).toEqual(null);
 
     // If there is no selection it the X icon should be gone.
     expect(el.find('.select2-search-choice-close').length).toEqual(0);
-
   });
 
+  it('should clear selection (with object as source)', function() {
+    var el = compileTemplate(
+      '<ui-select ng-model="selection.selected" theme="select2"> \
+        <ui-select-match placeholder="Pick one..." allow-clear="true">{{$select.selected.value.name}}</ui-select-match> \
+        <ui-select-choices repeat="person.value.name as (key,person) in peopleObj | filter: $select.search"> \
+          <div ng-bind-html="person.value.name | highlight: $select.search"></div> \
+          <div ng-bind-html="person.value.email | highlight: $select.search"></div> \
+        </ui-select-choices> \
+      </ui-select>'
+    );
+    var $select = el.scope().$select;
+
+    clickItem(el, 'Samantha');
+    expect(scope.selection.selected).toEqual('Samantha');
+
+    // allowClear should be true.
+    expect($select.allowClear).toEqual(true);
+
+    // Trigger clear.
+    el.find('.select2-search-choice-close').click();
+    expect(scope.selection.selected).toEqual(null);
+
+    // If there is no selection it the X icon should be gone.
+    expect(el.find('.select2-search-choice-close').length).toEqual(0);
+  })
+
   it('should toggle allow-clear directive', function() {
     scope.selection.selected = scope.people[0];
     scope.isClearAllowed = false;