ohh, thanks, Daniel! I like your way. and i don't even my to expose the
user_id in a form.I'll try that.
On Mon, Jun 15, 2009 at 10:55 PM, Daniel Roseman <dan...@roseman.org.uk>wrote:
>
> On Jun 16, 1:12 am, k-dj <kah...@gmail.com> wrote:
> > I'm just starting to use django and have run into a problem I have not
> > been able to solve.
> >
> > I have a model Item which stores, among other things, user_id.
> > Then I have a ModelForm. I want user_id to be a hidden field. After
> > searching around the web, I found out how to create a hidden field.
> > The template is rendered as I like it.
> > user_id is a hidden field with a value of 1. The problem is when I
> > submit the form, I get IntegrityError. "Column 'user_id' cannot be
> > null".
> >
> > but from the debug message I get back I can see that POST has all 3
> > things I need. So maybe when a new form is created there is problem.
> >
> > views.py
> > @login_required
> > def newItem(request):
> > if not request.POST:
> > form = ItemForm()
> > return
> render_to_response('manager/newItem.html',{'form':form})
> > newForm = ItemForm(request.POST)
> > if newForm.is_valid():
> > newForm.save() #problem here?
> > return HttpResponsePermanentRedirect('.')
> >
> > models.py
> > class Item(models.Model):
> > user = models.ForeignKey(User)
> > name = models.CharField(max_length=32)
> > description = models.CharField(max_length=128)
> > creation_date = models.DateField(auto_now=True)
> >
> > forms.py
> > class ItemForm(ModelForm):
> > user_id_wid = forms.HiddenInput(attrs={'value': 1})
> > user_id = forms.IntegerField(widget=user_id_wid,required=False)
> > class Meta:
> > model = Item
> > fields = ['name', 'description']
>
>
> You can't set 'value' as an argument to attrs.
>
> If you want to preset the value of a field, pass in an 'initial'
> dictionary on form instatiation:
> form = MyForm(initial={'user_id':1})
>
> However a much better way is not to have the user_id field in the form
> at all, and set the correct value on the object on save.
>
> class itemForm(ModelForm):
> ....
> class Meta:
> model = Item
> exclude = ('user',)
>
> and in the view:
> if newForm.is_valid():
> item = newForm.save(commit=False)
> item.user_id = 1
> item.save()
>
> --
> DR.
> >
>
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