Made BoundFields iterable, so that you can iterate over individual radio buttons of a RadioSelect in a template

git-svn-id: http://code.djangoproject.com/svn/django/trunk@17173 bcc190cf-cafb-0310-a4f2-bffc1f526a37

django/forms/forms.py

@@ -410,6 +410,16 @@ class BoundField(StrAndUnicode):
             return self.as_widget() + self.as_hidden(only_initial=True)
         return self.as_widget()
 
+    def __iter__(self):
+        """
+        Yields rendered strings that comprise all widgets in this BoundField.
+
+        This really is only useful for RadioSelect widgets, so that you can
+        iterate over individual radio buttons in a template.
+        """
+        for subwidget in self.field.widget.subwidgets(self.html_name, self.value()):
+            yield self.as_widget(subwidget)
+
     def _errors(self):
         """
         Returns an ErrorList for this field. Returns an empty ErrorList

django/forms/widgets.py

@@ -156,6 +156,15 @@ class Widget(object):
         memo[id(self)] = obj
         return obj
 
+    def subwidgets(self, name, value, attrs=None, choices=()):
+        """
+        Yields all "subwidgets" of this widget. Used only by RadioSelect to
+        allow template access to individual <input type="radio"> buttons.
+
+        Arguments are the same as for render().
+        """
+        yield self
+
     def render(self, name, value, attrs=None):
         """
         Returns this Widget rendered as HTML, as a Unicode string.
@@ -628,6 +637,12 @@ class RadioInput(StrAndUnicode):
         self.index = index
 
     def __unicode__(self):
+        return self.render()
+
+    def render(self, name=None, value=None, attrs=None, choices=()):
+        name = name or self.name
+        value = value or self.value
+        attrs = attrs or self.attrs
         if 'id' in self.attrs:
             label_for = ' for="%s_%s"' % (self.attrs['id'], self.index)
         else:
@@ -681,6 +696,10 @@ class RadioSelect(Select):
             self.renderer = renderer
         super(RadioSelect, self).__init__(*args, **kwargs)
 
+    def subwidgets(self, name, value, attrs=None, choices=()):
+        for widget in self.get_renderer(name, value, attrs, choices):
+            yield widget
+
     def get_renderer(self, name, value, attrs=None, choices=()):
         """Returns an instance of the renderer."""
         if value is None: value = ''