Nested models form saving: This field is required error - django

Question

models.py:
from django.db import models
from django.contrib.auth.models import User as BaseUser
CHOICE_GENDER = ((1, 'Male'), (2, 'Female'))
class Location(models.Model):
city = models.CharField(max_length=75)
country = models.CharField(max_length=25)
def __str__(self):
return ', '.join([self.city, self.state])
class Users(BaseUser):
user = models.OneToOneField(BaseUser, on_delete=models.CASCADE)
gender = models.IntegerField(choices=CHOICE_GENDER)
birth = models.DateField()
location = models.ForeignKey(Location)
class Meta:
ordering = ('user',)
forms.py:
from django.contrib.auth.forms import UserCreationForm
from django import forms
from .models import Users, Location
class LocationForm(forms.ModelForm):
class Meta:
model = Location
fields = '__all__'
class RegistrationForm(UserCreationForm):
class Meta:
model = Users
fields = ('username', 'email', 'first_name', 'last_name', 'gender', 'birth', 'location')
views.py:
def signup(request):
if request.method == "POST":
reg_form = forms.RegistrationForm(request.POST)
loc_form = forms.LocationForm(request.POST)
if loc_form.is_valid():
reg_form.location = loc_form.save()
if reg_form.is_valid():
reg_form.save()
return redirect('./')
reg_form = forms.RegistrationForm()
loc_form = forms.LocationForm()
return render(request, 'signup.html', {'loc_form': loc_form, 'reg_form': reg_form})
I can't manage to make this work, it gives location - This field is required error. I've tried every combination in views.py, and it never passed the reg_form.is_valid() command due to that reason. Can anybody help me in this? Thanks in advance!
SOLVED: views.py new, working code:
def signup(request):
if request.method == "POST":
reg_form = forms.RegistrationForm(request.POST)
loc_form = forms.LocationForm(request.POST)
if reg_form.is_valid():
reg = reg_form.save(commit=False)
if loc_form.is_valid():
reg.location = loc_form.save()
reg.save()
return redirect('./')
reg_form = forms.RegistrationForm()
loc_form = forms.LocationForm()
return render(request, 'signup.html', {'loc_form': loc_form, 'reg_form': reg_form})

Answer 1

Removing location from RegistrationForm fields tuple should stop the behavior.
Since you are using a separate form for Location, you shouldn't populate location field using RegistrationForm.