我有以下表格：
class locationForm(forms.Form):
existing_regions= forms.ModelChoiceField(queryset=Region.objects.none(), label="Region Name", required=False)
region_name = forms.CharField()
location_name = forms.CharField()
street_address = forms.CharField()
city = forms.CharField()
zip_code = forms.CharField()
以及此表单的以下更新视图：
class UpdateLocation(View):
template_name = "dash/location_update_form.html"
def get(self, request, *args, **kwargs):
loc = kwargs['name']
try:
location = Location.objects.get(name=loc)
form = locationForm(instance=location)
return render(request, self.template_name, {'form': form,'location': location})
except (ValueError, ObjectDoesNotExist):
return redirect(reverse('geofence_manager'))
def post(self, request, *args, **kwargs):
loc = self.kwargs['name']
try:
location = Location.objects.get(name=loc)
form = locationForm (request.POST, instance=location)
if form.is_valid():
form.save()
else:
form = locationForm(request.POST, instance=location)
return render(request, self.template_name, {'location': location, 'form': form})
except (ValueError, ObjextDoesNotExist):
return redirect(reverse('location_manager'))
return redirect(reverse('location_manager'))
我在使用“实例”关键字参数方面收到错误。我相信这与我不使用Modelform（我可能是错误的）有关。但是我不想使用aModelform来构造表单，所以有办法解决这个问题吗？
class locationForm(ModelForm):
class Meta:
model = Location
fields = '__all__'
在您看来：
...
locationForm.base_fields['existing_regions'] = forms.ModelChoiceField(queryset= ...)
form = locationForm()
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我来说两句