On Sep 18, 1:01 pm, Tom Evans <tevans...@googlemail.com> wrote:
> Hi all. I have a model form to update two attributes on a UserProfile.
>
> The form is simple:
>
> class UserProfileSetRememberMeForm(forms.ModelForm):
> DURATION_CHOICES = (
> ( 0, 'Default (2 weeks)'),
> ( 1 * 7 * 24 * 60 * 60, '1 week'),
> )
> YESNO_CHOICES = ( (0, 'No'), (1, 'Yes'), )
> remember_me_duration = forms.TypedChoiceField(choices=DURATION_CHOICES,
> required=False,
> coerce=smart_int)
> remember_me = forms.ChoiceField(choices=YESNO_CHOICES, required=False)
>
> def __init__(self, *args, **kwargs):
> super(forms.ModelForm, self).__init__(*args, **kwargs)
> attrs = { 'class': 'remember_me', }
> self.fields['remember_me'].widget.attrs = dict(attrs)
> if 'instance' in kwargs and not kwargs['instance'].remember_me:
> attrs['disabled'] = 'disabled'
> self.fields['remember_me_duration'].widget.attrs = dict(attrs)
>
> class Meta:
> model = UserProfile
> fields = ( 'remember_me', 'remember_me_duration' )
>
> The two fields are defined like so:
> remember_me = models.BooleanField()
> remember_me_duration = models.IntegerField(default=0)
>
> The view is similarly simple:
>
> def update_user_remember_me(request, user_id=None):
> user = get_object_or_404(User, id=user_id)
> prof = user.get_profile()
> print "current: pk: %d remember_me: %s duration: %d" \
> % (prof.pk, prof.remember_me, prof.remember_me_duration)
> json = { 'valid': False }
> if request.method == 'POST':
> frm = UserProfileSetRememberMeForm(request.POST, instance=prof)
> if frm.is_valid():
> p2 = frm.save(commit=False)
> print "to save: pk: %d remember_me: %s duration: %d" \
> % (prof.pk, prof.remember_me, prof.remember_me_duration)
> p2.save()
> prof = UserProfile.objects.get(pk=prof.pk)
> print "from db: pk: %d remember_me: %s duration: %d" \
> % (prof.pk, prof.remember_me, prof.remember_me_duration)
> json['enabled'] = prof.remember_me == 1
> json['valid'] = True
> return JsonResponse(json)
>
> The debug output shows that (as far as I can see), the model should be
> saved and the DB updated:
>
> current: pk: 1 remember_me: 1 duration: 0
> to save: pk: 1 remember_me: 0 duration: 0
> from db: pk: 1 remember_me: 1 duration: 0
>
> However, as you can see, it is not updated. Calling
> 'p2.save(force_update=True)' results in a 'Database error: Forced update
> did not affect any rows' exception.
>
> Any ideas? This is flummoxing me :/
>
> Cheers
>
> Tom
I don't think that code can be producing the output you give. The line
where you print the 'to save' information is getting it from the
original 'prof' object, not the new 'p2' object from form.save(), so
the output should be the same.
Can you post the actual code that you're running?
--
DR.
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