Hi Maninder,
This error seems because i used choice field which actually use names as
values but django expects the id.
As Django automatically creates a ModelChoicefield for a Foreign Key which
use the correct values,i modified the code as below in forms.py.
I have a requirement to populate only unique values for registered_model
from the values returned from ModelRegister .
I modified the code as below and now i am able to get the unique values .
====================================================================================================================
def unique_values():
return
[("","---------------")]+list(ModelRegister.objects.values_list('model_name','model_name').order_by('model_name').distinct())
registered_model = forms.ChoiceField(required=False,choices=unique_values)
====================================================================================================================
registered_model =
forms.ModelChoiceField(queryset=ModelRegister.objects.values_list('model_name',flat=True).order_by('model_name').distinct())
====================================================================================================================
Error is resolved now.
But once i fill all the values in formset and submit the form.
Not able to redirect to List View. Even if i click on submit button it
stays on the same page.Anything needs to be taken care during POST request
to save the created model formsets in the database.in the
-
-
*def create_model_gsp_request_form(request,id=None):
print("Inside create_model_gsp_request_form")
template_name = "ModelGSPRequest.html"
heading_message = "ModelGSPRequest"
if id:
action = 'edit'
model = get_object_or_404(ModelGSPRequest, pk=id)
else:
action = 'submit'
model = ModelGSPRequest()
message = ""
if request.method == 'GET':
print("Get request in create_model_gsp_request_form")
# we don't want to display the already saved model instances
#formset =
ModelGSPRequestFormSet(queryset=ModelGSPRequest.objects.none(),instance=model)
formset = ModelGSPRequestFormSet()
#registered_model_details = serializers.serialize("json",
ModelRegister.objects.all())
#print("registered_model_details:", registered_model_details)
elif request.method == 'POST':
print("post request in create_model_gsp_request_form")
formset = ModelGSPRequestFormSet(request.POST,request.FILES)
if formset.is_valid():
for form in formset:
# only save if name is present
#if form.cleaned_data.get('name'):
new_form = form.save(commit=False)
new_form.model_gsp_requester = request.user.username
new_form.save()
formset.save_m2m()
#return redirect('ModelGSPRequestList')
return HttpResponseRedirect('/gspapp/ModelGSPRequestList')
return render(request, template_name, {
'formset': formset,
'heading': heading_message,
#'registered_model_data': registered_model_details,
'action':action
})*
-
Regards,
N.Dilip Kumar.
On Monday, February 10, 2020 at 12:11:42 AM UTC+5:30, Dilipkumar Noone
wrote:
>
> I am a Django learner.
>
> 1.I have a requirement to create the multiple forms in a single page for a
> model.
> 2.So i created the formset using modelformset_factory.
> 3.I have 2 models.
> a)ModelRegister b)ModelGSPRequest. 4.ModelGSPRequest has a field named
> registered_model which is a foreignKey to ModelRegister. 5.But after i
> input all the fields for a modelformset and click on submit to save. I am
> facing below error with the foreign key field.
>
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