Question

I’m rendering out 3 multiple select boxes on my form.
I’m filtering each box out to have a seperate type of day.
When I submit my form I get this error.

int() argument must be a string or a number, not 'QueryDict'

What must I do to save my form?

This is what i’m doing on my forms.py file to get the different filtering for each select box.

class ContractForm(forms.ModelForm):

    def __init__(self, project_id, *args, **kwargs):
        super(ContractForm, self).__init__(*args, **kwargs)
        self.fields['shoot_day'].queryset = Day.objects.filter(type=SHOOT, project__id=project_id)
        self.fields['travel_day'].queryset = Day.objects.filter(type=TRAVEL, project__id=project_id)
        self.fields['additional_day'].queryset = Day.objects.filter(type=ADDITIONAL, project__id=project_id)

---

I’m getting my project_id like so:

def editcontract(request, contract_id, slug):
    context_dict = {}
    contract = get_object_or_404(Contract, pk=contract_id)
    if request.method == 'POST':
        form = ContractForm(request.POST, instance=contract)
        if form.is_valid():
            form.save()
            TvUsageForm = TvUsageFormSet(request.POST, instance=contract)
            AdditionalMediaUsageForm = AdditionalMediaUsageFormSet(request.POST, instance=contract)
            TvUsageForm.save()
            AdditionalMediaUsageForm.save()
            return  HttpResponseRedirect(reverse('contract_list', kwargs={'slug':slug}))
    else:
        form = ContractForm(instance=contract, project_id=contract.project_id)
        TvUsageForm = TvUsageFormSet(instance=contract)
        AdditionalMediaUsageForm = AdditionalMediaUsageFormSet(instance=contract)
        project = get_object_or_404(Project, slug=slug)
        context_dict = { 'form': form,
                         'tvusage_form':TvUsageForm,
                         'additional_form':AdditionalMediaUsageForm,
                         'project':project
        }
    return render_to_response('contracts/edit_contract.html', context_dict, RequestContext(request))

Answer 1

You have a confusion with the argument list and keyword arguments:

Instead of:

ContractForm(instance=contract, project_id=contract.project_id)

You want:

ContractForm(contract.project_id, instance=contract)

To elaborate: Your constructor accepts the project id as first argument not as keyword argument. Thus you need to give it as first argument. Simple confusion, eh?