It builds up on the things mentioned in the documentation for normal forms. Also, the documentation for ModelForm's save instance has pretty explicit examples of creating form instances:
http://docs.djangoproject.com/en/dev/topics/forms/modelforms/#the-save-method -- dz On Tue, Mar 24, 2009 at 3:21 PM, Theme Park Photo, LLC <swir...@gmail.com> wrote: > > Error fields were all empty. I checked methods non_field_errors and > _get_errors; _errors was None. > > But Alex Gaynor was right! When I added the form "POST" data in, the > form validated. I assumed that creating a ModelForm from an existing > instance would give it valid data, but that's not the case. (Though > the Django Documentation doesn't say this: > http://docs.djangoproject.com/en/dev/topics/forms/modelforms/ ) > > > On Mar 24, 12:15 pm, David Zhou <da...@nodnod.net> wrote: >> If it's not valid, then something likely threw a validation error. >> What does the error say? >> >> -- dz >> >> On Tue, Mar 24, 2009 at 3:11 PM, Theme Park Photo, LLC >> >> <swir...@gmail.com> wrote: >> >> > It has data! It was created from an existing instance...and all the >> > fields have values >> >> > 'body': u'<p>hello there</p>', 'allow_comments': >> > 1, 'author': 10L, 'tease': u'<p>hello there</ >> > p>', >> > 'publish': datetime.datetime(2009, 3, 23, 15, >> > 3, >> > 36), 'score': -93L, 'categories': [1L], >> > 'title': >> > u'Hello', 'slug': u'hello-0', 'tags': >> > u'hello'} >> >> > On Mar 24, 12:06 pm, Alex Gaynor <alex.gay...@gmail.com> wrote: >> >> On Tue, Mar 24, 2009 at 3:02 PM, Theme Park Photo, LLC >> >> <swir...@gmail.com>wrote: >> >> >> > Im trying to get code to edit an existing record in a table working. >> >> > For some reason, form.is_valid is returning false (and I can't save it >> >> > because there's no cleaned data). Even reduced to this (below) where >> >> > I'm simply getting an existing "Post" object, creating a ModelForm, >> >> > and validating it, fails! >> >> >> > Any suggestions? >> >> >> > post = Post.objects.get(id=postId) >> >> > form = PostForm(instance=post) >> >> > if form.is_valid(): # All validation rules pass >> >> > form.save() >> >> > else: >> >> > # at this point, non_field_errors and _get_errors >> >> > return null. _errors is defined as none(), yet form.is_valid >> >> > # is returning false >> >> >> A form without data is never considered valid. You probably want your >> >> workflow to be more like: >> >> >> obj = Model.objects.get() >> >> if request.method == 'POST': >> >> form = Form(request.POST, isntance=obj) >> >> if form.is_valid(): >> >> form.save() >> >> else: >> >> form = Form(instance=obj) >> >> return render_to_response() >> >> >> -- >> >> "I disapprove of what you say, but I will defend to the death your right >> >> to >> >> say it." --Voltaire >> >> "The people's good is the highest law."--Cicero > > > --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Django users" group. To post to this group, send email to django-users@googlegroups.com To unsubscribe from this group, send email to django-users+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/django-users?hl=en -~----------~----~----~----~------~----~------~--~---
