Oh, and here's the view:
def edit_participant(request, project_pk, participant_pk):
project = get_object_or_404(Project, pk = project_pk)
participant = get_object_or_404(Participant, pk =
participant_pk)
if request.method == 'POST':
form = EditParticipantForm(request.POST,
instance=participant)
if form.is_valid():
form.save()
request.session['flash_message'] = 'Participant
successfully updated'
return HttpResponseRedirect(reverse('view_project',
kwargs={ 'project_pk': project.pk }))
else:
form = EditParticipantForm(instance=participant)
return render_to_response('projects/edit_participant.html',
{ 'form': form, 'participant':
participant },
context_instance=RequestContext(request))
On Dec 23, 9:04 pm, Julien <[EMAIL PROTECTED]> wrote:
> Hi there,
>
> I don't understand why the form doesn't validate when I don't fill out
> a ManyToManyField.
>
> Here's the code:
>
> class Participant(models.Model):
> project = models.ForeignKey(Project, related_name='participants')
> roles = models.ManyToManyField(Role, blank=True, null=True)
> user = models.ForeignKey(User)
>
> class EditParticipantForm(forms.ModelForm):
> roles =
> forms.MultipleChoiceField(widget=TableSelectMultiple(item_attrs=('name',)))
> def __init__(self, *args, **kwargs):
> super(EditParticipantForm, self).__init__(*args, **kwargs)
> self.fields['roles'].choices = [(role.pk, role) for role in
> Role.objects.all()]
> class Meta:
> model = Participant
> fields = ('roles',)
>
> (The custom widget TableSelectMultiple is taken from
> there:http://www.djangosnippets.org/snippets/518/)
>
> If I don't select any option for 'roles' I get the error 'This field
> is required'.
> Yet, the doc says that the form field shouldn't be required if the
> corresponding model field has
> 'blank=True':http://www.djangoproject.com/documentation/modelforms/#field-types
>
> Is that a bug or is there a sensible explanation? :)
>
> Thanks a lot for your help!
>
> Julien
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