On Feb 4, 11:56 am, "[EMAIL PROTECTED]" <[EMAIL PROTECTED]> wrote:
> On Feb 4, 8:13 am, "James Bennett" <[EMAIL PROTECTED]> wrote:
> > On Feb 4, 2008 6:43 AM, [EMAIL PROTECTED] <[EMAIL PROTECTED]> wrote:
>
> > > as you can see, I hide the primary and foreign key fields (yes, I am
> > > aware of the security implications: can we fix the real problem
> > > please ;-)
>
For the record the simple solution to this problem is as follows. I
included the primary and foreign key fields on the form due to a
misunderstanding of forms processing. When a form is used to *create*
a model instance either it has to onclude all mandatory columns or it
has to be saved with commit=False, then the resulting model instance
has to have the missing columns added before it is saved.
Fortunately this does not apply to update, where it *is* possible to
update a subset of the fields. I therefore changed the Answer
ModelForm definition to
class AnswerForm(forms.ModelForm):
class Meta:
model = Answer
fields = ['anstext', 'ansresult', 'ansseq']
and the view to
def answer(request, domid, quedqno, ansseq, ansid):
question_no = "%s-%s" % (domid, quedqno)
if request.method == 'POST':
answer = Answer.objects.get(pk=ansid)
form = AnswerForm(request.POST, instance=answer)
if form.is_valid():
answer = form.save()
return HttpResponseRedirect("/edit/question/%s/%s/" %
(domid, quedqno))
else:
domain = Domain.objects.get(pk=domid)
question = Question.objects.get(quedomid=domain.domid,
quedqno=quedqno)
answer = Answer.objects.get(pk=ansid)
form = AnswerForm(instance=answer)
return render_to_response("answer.html", locals(),
RequestContext(request))
and all was well.
Further, nobody was ever going to 'hack me", as the site is a purely
experimental one. None the less I am glad to have discovered the
correct way to solve this problem.
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