Insert One to One field value in django - django

Question

I have the following models.
class PatientInfo(models.Model):
lastname = models.CharField('Last Name', max_length=200)
firstname = models.CharField('First Name',max_length=200)
middlename = models.CharField('Middle Name',max_length=200)
...
def get_absolute_url(self):
return reverse('patient:medical-add', kwargs={'pk': self.pk})
class MedicalHistory(models.Model):
patient = models.OneToOneField(PatientInfo, on_delete=models.CASCADE, primary_key=True,)
...
and upon submitting PatientInfo form it will go to another form which supply the MedicalHistory Details. I can see my PatientInfo data as well as MedicalHistory data but not linked to each other. Below is my MedicalCreateView which process my MedicalHistory form.
class MedicalCreateView(CreateView):
template_name = 'patient/medical_create.html'
model = MedicalHistory
form_class = MedicalForm
def post(self, request, pk):
form = self.form_class(request.POST)
if form.is_valid():
patiente = form.save(commit=False)
physician_name = form.cleaned_data['physician_name'] # do not delete
patient = PatientInfo.objects.all(id=self.kwargs['pk'])
MedicalHistory.patient = self.kwargs['pk']
patiente.save()
messages.success(request, "%s is added to patient list" % physician_name )
return redirect('index')
else:
print(form.errors)
This is how I set MedicalHistory.patient field using the PatientInfo.pk
MedicalHistory.patient = self.kwargs['pk']

Answer 1

If you are using OneToOneField and want to link MedicalHistory to PatientInfo automatically you need to use signals.
class MedicalHistory(models.Model):
patient = models.OneToOneField(PatientInfo, on_delete=models.CASCADE, primary_key=True,)
. . . . .
#receiver(post_save, sender=PatientInfo)
def create_medical_history(sender, instance, created, **kwargs):
if created:
MedicalHistory.objects.create(patient=instance)
#receiver(post_save, sender=PatientInfo)
def save_medical_history(sender, instance, **kwargs):
instance.medicalhistory.save()
Views
class MedicalCreateView(CreateView):
template_name = 'patient/medical_create.html'
model = MedicalHistory
form_class = MedicalForm
success_url = '/'