fix(input.radio): support 2-way binding in a repeater

Closes #869

src/ng/directive/input.js

@@ -576,8 +576,10 @@ function emailInputType(scope, element, attr, ctrl, $sniffer, $browser) {
 }
 
 function radioInputType(scope, element, attr, ctrl) {
-  // correct the name
-  element.attr('name', attr.id + '@' + attr.name);
+  // make the name unique, if not defined
+  if (isUndefined(attr.name)) {
+    element.attr('name', nextUid());
+  }
 
   element.bind('click', function() {
     if (element[0].checked) {
@@ -1144,9 +1146,9 @@ var CONSTANT_VALUE_REGEXP = /^(true|false|\d+)$/;
 var ngValueDirective = [function() {
   return {
     priority: 100,
-    compile: function(tpl, attr) {
-      if (CONSTANT_VALUE_REGEXP.test(attr.ngValue)) {
-        return function(scope) {
+    compile: function(tpl, tplAttr) {
+      if (CONSTANT_VALUE_REGEXP.test(tplAttr.ngValue)) {
+        return function(scope, elm, attr) {
           attr.$set('value', scope.$eval(attr.ngValue));
         };
       } else {

test/ng/directive/inputSpec.js

@@ -1106,5 +1106,49 @@ describe('input', function() {
       browserTrigger(inputElm.eq(1), 'click');
       expect(scope.selected).toBe(2);
     });
+
+
+    it('should work inside ngRepeat with primitive values', function() {
+      compileInput(
+        '<div ng-repeat="i in items">' +
+          '<input type="radio" name="sel_{{i.id}}" ng-model="i.selected" ng-value="true">' +
+          '<input type="radio" name="sel_{{i.id}}" ng-model="i.selected" ng-value="false">' +
+        '</div>');
+
+      scope.$apply(function() {
+        scope.items = [{id: 1, selected: true}, {id: 2, selected: false}];
+      });
+
+      inputElm = formElm.find('input');
+      expect(inputElm[0].checked).toBe(true);
+      expect(inputElm[1].checked).toBe(false);
+      expect(inputElm[2].checked).toBe(false);
+      expect(inputElm[3].checked).toBe(true);
+
+      browserTrigger(inputElm.eq(1), 'click');
+      expect(scope.items[0].selected).toBe(false);
+    });
+
+
+    it('should work inside ngRepeat without name attribute', function() {
+      compileInput(
+        '<div ng-repeat="i in items">' +
+          '<input type="radio" ng-model="i.selected" ng-value="true">' +
+          '<input type="radio" ng-model="i.selected" ng-value="false">' +
+        '</div>');
+
+      scope.$apply(function() {
+        scope.items = [{id: 1, selected: true}, {id: 2, selected: false}];
+      });
+
+      inputElm = formElm.find('input');
+      expect(inputElm[0].checked).toBe(true);
+      expect(inputElm[1].checked).toBe(false);
+      expect(inputElm[2].checked).toBe(false);
+      expect(inputElm[3].checked).toBe(true);
+
+      browserTrigger(inputElm.eq(1), 'click');
+      expect(scope.items[0].selected).toBe(false);
+    });
   });
 });