Fixed #3289 -- newforms: Added value_from_datadict method to MultipleHiddenInput

git-svn-id: http://code.djangoproject.com/svn/django/trunk@4311 bcc190cf-cafb-0310-a4f2-bffc1f526a37

django/newforms/widgets.py

@@ -92,11 +92,21 @@ class MultipleHiddenInput(HiddenInput):
     A widget that handles <input type="hidden"> for fields that have a list
     of values.
     """
-    def render(self, name, value, attrs=None):
+    def __init__(self, attrs=None, choices=()):
+        # choices can be any iterable
+        self.attrs = attrs or {}
+        self.choices = choices
+
+    def render(self, name, value, attrs=None, choices=()):
         if value is None: value = []
         final_attrs = self.build_attrs(attrs, type=self.input_type, name=name)
         return u'\n'.join([(u'<input%s />' % flatatt(dict(value=smart_unicode(v), **final_attrs))) for v in value])
 
+    def value_from_datadict(self, data, name):
+        if isinstance(data, MultiValueDict):
+            return data.getlist(name)
+        return data.get(name, None)
+
 class FileInput(Input):
     input_type = 'file'
 

tests/regressiontests/forms/tests.py

@@ -1950,11 +1950,20 @@ conveniently work with this.
 >>> f.errors
 {}
 >>> from django.utils.datastructures import MultiValueDict
->>> data = MultiValueDict(dict(name='Yesterday', composers=['J', 'P']))
+>>> data = MultiValueDict(dict(name=['Yesterday'], composers=['J', 'P']))
 >>> f = SongForm(data)
 >>> f.errors
 {}
 
+The MultipleHiddenInput widget renders multiple values as hidden fields.
+>>> class SongFormHidden(Form):
+...     name = CharField()
+...     composers = MultipleChoiceField(choices=[('J', 'John Lennon'), ('P', 'Paul McCartney')], widget=MultipleHiddenInput)
+>>> f = SongFormHidden(MultiValueDict(dict(name=['Yesterday'], composers=['J', 'P'])), auto_id=False)
+>>> print f.as_ul()
+<li>Name: <input type="text" name="name" value="Yesterday" /><input type="hidden" name="composers" value="J" />
+<input type="hidden" name="composers" value="P" /></li>
+
 When using CheckboxSelectMultiple, the framework expects a list of input and
 returns a list of input.
 >>> f = SongForm({'name': 'Yesterday'}, auto_id=False)