On Fri, 2009-09-18 at 15:29 +0100, Tom Evans wrote:
> On Fri, 2009-09-18 at 06:53 -0700, Daniel Roseman wrote:
> > On Sep 18, 1:01 pm, Tom Evans <[email protected]> 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()
It is definitely related to type coercion: if I just change remember_me
to be a PositiveSmallIntegerField, the exact same code works perfectly.
I would really like to know what is wrong with my code when it is a
BooleanField, but this work around stops me swearing at my computer
incessantly :)
I also just noticed I never mentioned this is with django 1.0 .
> > > 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.
>
> Yep, I noticed that shortly after sending it. The output is the same if
> I change the 'to save' line to print out from p2 rather than prof.
>
> I'm trying to trace it through pdb, but its slow going. I think it might
> be related to type coercions..
>
> Here is the exact code I'm running at the moment in the view, and the
> output it generates. I thought to have a look at connection.queries, but
> it never issues one, so that isn't very interesting either :/
>
> def update_user_remember_me(request, user_id=None):
> from django.db import connection
> connection.queries=[]
> 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)
> p2.save()
> print "to save: pk: %d remember_me: %s duration: %d" \
> % (p2.pk, p2.remember_me, p2.remember_me_duration)
> 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)
> print connection.queries
> json['enabled'] = prof.remember_me == 1
> json['valid'] = True
> return JsonResponse(json)
>
>
> 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
> []
>
>
> Cheers
>
> Tom
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