fixed issue with radio view clobering model if radio was checked.

2 files changed, 9 insertions, 3 deletions

diff --git a/src/Scope.js b/src/Scope.js
index 687d3628..7bcf7380 100644
--- a/src/Scope.js
+++ b/src/Scope.js
@@ -97,7 +97,7 @@ function createScope(parent, services, existing) {
     $set: bind(instance, setter, instance),
 
     $eval: function $eval(exp) {
-      if (exp) {
+      if (exp !== undefined) {
         return expressionCompile(exp).apply(instance, slice.call(arguments, 1, arguments.length));
       } else {
         foreach(evalLists.sorted, function(list) {
diff --git a/src/widgets.js b/src/widgets.js
index 4eae735f..7de4bdc1 100644
--- a/src/widgets.js
+++ b/src/widgets.js
@@ -155,9 +155,15 @@ function initWidgetValue(initValue) {
 
 function radioInit(model, view, element) {
  var modelValue = model.get(), viewValue = view.get(), input = element[0];
+ input.checked = false;
  input.name = this.$id + '@' + input.name;
- if (isUndefined(modelValue)) model.set(null);
- if (viewValue !== null) model.set(viewValue);
+ if (isUndefined(modelValue)) {
+   model.set(modelValue = null);
+ }
+ if (modelValue == null && viewValue !== null) {
+   model.set(viewValue);
+ }
+ view.set(modelValue);
 }
 
 function inputWidget(events, modelAccessor, viewAccessor, initFn) {