Is it possible to supply a clean_[fieldname] method to a ModelForm for
custom validation rules like you can with a normal Form? I've got a
form with an author column that maps to Django's User class. I want a
default to be set if none is given. I've tried many ways to
accomplish this and haven't found one...
I don't want to tie it to the model directly as going through
different logical paths means slightly different defaults.
I tried adding a `clean_author` method but that didn't seem to work
either. Simple example (not the actual code):
class ClipForm(ModelForm):
class Meta:
model = Clip
def clean_author(self):
if not self.cleaned_data.get('author', None):
return User.objects.get(pk=1)
In my view, I have:
if request.method == 'POST':
form = ClipForm(data=request.POST)
if form.is_valid():
new_clip = form.save()
# ...
else:
# ...
My understanding is that the is_valid() method kicks off the
Field.clean(), Field.clean_*(), and Form.clean() methods which should
call my clean_author method and assign an author if one isn't given.
But what happens is that is_valid() returns false with the error that
the author field is required.
Any guidance is appreciated.
Thanks,
Rob
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