All,
I have a form with a MultiValueField that almost works. It uses a choicefield and charfield (with a corresponding Select and TextInput for the widgets)::
custom_choices = [("one","one"),("two","two"),("other","other")]
class MyMultiWidget(forms.MultiWidget):
    def __init__(self,*args,**kwargs):
        widgets = (
            forms.Select(choices=custom_choices),
            forms.TextInput(),
        )
        super(MyMultiWidget, self).__init__(widgets,*args,**kwargs)
    def decompress(self, value):
        if value:
            return value.split("|")
        return ['', '']
class MyMultiValueField(forms.MultiValueField):
    def __init__(self, *args, **kwargs):
        fields = (
            forms.ChoiceField(required=True),
            forms.CharField(max_length=128,required=False),
        )
        super(MyMultiValueField, self).__init__(fields, *args, **kwargs)
        self.widget = TestMultiWidget()
    def compress(self, data_list):
        if data_list:
            return '|'.join(data_list)
class MyTestField(models.Field):
    def formfield(self, **kwargs):
        return super(MyTestField, self).formfield(form_class=MyMultiValueField)
class MyModel(models.Model):
    myField = MyTestField()
The compress function seems to be working; it returns a list of two strings as expected. But the "value" argument in decompress is always None. Sure enough, when I check the database directly, the myField column is consistently set to null. Any ideas what's happening inbetween compress and decompress? Why isn't the value from compress actually being stored?
Thanks.