Brandon, Thanks for your suggestion.
I tried passing it an ID, but as you say, I also have to override the
save. What I don't understand is why it does it fine if the form
includes the foreign key in a popup? They are both passing back
integers after all.
Also failed to get the save method working, tried to pass in the
course instance, but it still ends up trying to save with the id of
the course. Is it not using cleaned_data?
def save(self, course=False, force_insert=False,
force_update=False, commit=True):
if course:
self.cleaned_data['course'] = course
return super(CourseBook, self).save(commit=commit)
Any suggestions welcome as I've spent the whole afternoon on this - I
won't go through the many other workarounds that havn't worked!
Phoebe.
On Mar 31, 4:02 pm, Brandon Taylor <btaylordes...@gmail.com> wrote:
> Hi there,
>
> Instead of using the course object in your initial data, which will
> pass in the __unicode__ representation of the object, pass in the id:
>
> form = CouseBook(initial = {'course': course.id})
>
> That should get you the numeric id, but you'll also need to override
> your save method to get the course object to assign when you save your
> CourseBook form, as you can't assign an integer (coming from your
> hidden form field) to the value of a ForeignKey field on a model.
>
> HTH,
> Brandon
>
> On Mar 31, 8:20 am, phoebebright <phoebebright...@gmail.com> wrote:
>
> > Displayed fields resolve as expected, hidden fields cause errors.
>
> > This works:
>
> > in the model
> > CourseBook has a foreign key to Course
>
> > In the view:
>
> > course = Course.objects.get(pk=whatever)
> > form = CouseBook(initial = {'course': course})
>
> > in the Form:
>
> > class CourseBook(ModelForm):
> > class Meta:
> > model = CourseBooking
>
> > The web page now displays a picklist of courses with the initial value
> > highlighted. I can now do a form.save() no problem.
>
> > However, if I make the course a hidden field, which is what I want.
>
> > class CourseBook(ModelForm):
> > course = forms.CharField(widget=forms.HiddenInput())
>
> > class Meta:
> > model = CourseBooking
>
> > then when I come to save() I get a ValueError, unable to assign "My
> > course" etc. as it tries to put the name of the course into the
> > foreign key instead of a course instance.
>
> > I can work around this putting a save method on the form, but it seems
> > to me django should resolve this for me????
>
>
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