just tried it out. worked perfectly. thanks!
On Tue, Jun 16, 2009 at 3:18 PM, Rochak Neupane <kah...@gmail.com> wrote:
> 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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