Thank you so much - that was a huge help!
Margie
On Dec 2, 5:17 pm, "Colin Bean" <[EMAIL PROTECTED]> wrote:
> On Tue, Dec 2, 2008 at 5:09 PM, Margie <[EMAIL PROTECTED]> wrote:
>
> > I'm a new user to django and am attempting to go through the Sams
> > "Teach Yourself Django in 24 hours" book and am having an issue
> > related to the chapter on saving form data. I'm hoping someone can
> > give me a hand.
>
> > I'm using Django 1.0
>
> > Here's my model:
>
> > class Person(models.Model):
> > userID = models.ForeignKey(User, unique=True)
> > name = models.CharField('name', max_length=200)
> > birthday = models.DateField('Birthday', blank = True, null=True)
> > email=models.EmailField('Email', max_length=100, unique=True)
>
> > Here's what the book says to use for the form:
>
> > def person_form(request, pID='0'):
> > p = get_object_or_404(Person, pk=pID)
> > if request.method == 'POST':
> > if request.POST['submit'] == 'update':
> > message = 'Update Request for %s.' % p.name
> > PersonForm = forms.form_for_instance(p)
> > f = PersonForm(request.POST.copy())
> > if f.is_valid():
> > try:
> > f.save()
> > message += ' Updated.'
> > except:
> > message = ' Database Error.'
> > else:
> > message += ' Invalid.'
>
> > That seems to be the "old" way of doing forms (I found that
> > forms_for_instance doesn't exist),
> > so I've modified it to look like this:
>
> > class PersonForm(ModelForm):
> > class Meta:
> > model=Person
>
> > def person_form(request, pID='0'):
> > p = get_object_or_404(Person, pk=pID)
> > if request.method == 'POST':
> > if request.POST['submit'] == 'update':
> > message = 'Update Request for %s.' % p.name
> > f = PersonForm(request.POST)
> > if f.is_valid():
> > try:
> > f.save()
> > message += ' Updates.'
> > except:
> > message = ' Database Error.'
> > else:
> > message += ' Invalid.'
>
> > I hope my modications are correct here - they could be part of the
> > issue.
>
> > The problem I have is that when I go to the form for a person, such as
> >http://127.0.0.1:8000/people/Form/3/, and then modify a field such
> > as the birthday, when I then click on the update button, the is_valid
> > ()
> > method returns false and the errors that get printed to the form are:
> > * Person with this UserID already exists
> > * Person with this Email already exists
>
> > It seems like update is trying to create a new person with the
> > same UserID, when really I want to just be modifying the person
> > with that UserID.
>
> > Can anyone tell me what I'm doing wrong?
>
> > Thanks,
>
> > Margie
>
> Change the way you create your form from this:
>
> f = PersonForm(request.POST)
>
> to this:
>
> f = PersonForm(request.POST, instance=p)
>
> Then your form will be populated with the data from 'p', and update
> that record instead of creating a new one.
>
> Colin- Hide quoted text -
>
> - Show quoted text -
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