Ticket #3193: multi_hidden.patch

django/newforms/forms.py

@@ -4 +4 @@
 
 from django.utils.datastructures import SortedDict, MultiValueDict
 from django.utils.html import escape
-from fields import Field
-from widgets import TextInput, Textarea, HiddenInput
+from fields import Field, MultipleChoiceField
+from widgets import TextInput, Textarea, HiddenInput, MultipleHiddenInput
 from util import StrAndUnicode, ErrorDict, ErrorList, ValidationError
 
 __all__ = ('BaseForm', 'Form')
@@ -234 +234 @@
         """
         Returns a string of HTML for representing this as an <input type="hidden">.
         """
+        if isinstance( self.field, MultipleChoiceField ):
+            return self.as_widget(MultipleHiddenInput(), attrs)
+
         return self.as_widget(HiddenInput(), attrs)
 
     def _data(self):

django/newforms/widgets.py

@@ -3 +3 @@
 """
 
 __all__ = (
-    'Widget', 'TextInput', 'PasswordInput', 'HiddenInput', 'FileInput',
+    'Widget', 'TextInput', 'PasswordInput', 'HiddenInput', 'MultipleHiddenInput', 'FileInput',
     'Textarea', 'CheckboxInput',
     'Select', 'SelectMultiple', 'RadioSelect', 'CheckboxSelectMultiple',
 )
@@ -87 +87 @@
     input_type = 'hidden'
     is_hidden = True
 
+class MultipleHiddenInput(HiddenInput):
+    def render(self, name, value, attrs=None):
+        if not value: value = []
+        final_attrs = self.build_attrs(attrs, type=self.input_type, name=name)
+        return u''.join( [ ( u'<input%s />' % flatatt( dict( value=val, **final_attrs ) )  ) for val in value] )
+
 class FileInput(Input):
     input_type = 'file'