Django模型：自動保存

我有2類從我的模型Django模型：自動保存

class APPLICANT_DATA(models.Model): 
    FIRST_NAME= models.CharField(max_length=20) 
    LAST_NAME= models.CharField(max_length=20) 
    MIDDLE_NAME= models.CharField(max_length=20)

和

class Applicant_status(models.Model): 
    fkey = models.ForeignKey(APPLICANT_DATA) 
    COMMENTS = models.CharField(max_length=100, null=True) 
    date_of_app = models.DateTimeField(auto_now_add=True, blank=True)

如何讓我的「Applicant_status」每當「APPLICANT_DATA」數據插入填充？

這裏是我的views.py

def save_page(request): 
form = application_form(request.POST) 
if request.method == 'POST': 

    if form.is_valid(): 

      emails = form.cleaned_data['EMAIL'] 
      mail = EmailMessage("Your activation and application code is: asdasd, do not show this to anyone", to=[emails]) 

      mail.send() 
      cde = form.save(commit=False) 
      applicant_status.objects.create(fk=cde.id) 
      cde.save() 



      return HttpResponseRedirect('verify') 

else: 
    form = application_form() 

return render(request, 'frontend/apply.html', {'form': form})`

編輯：我的forms.py

from django.forms import ModelForm 
from django import forms 
from .models import APPLICANT_DATA 
from django.core.exceptions import ValidationError 
from django.core.validators import RegexValidator 

class application_form(ModelForm): 

FIRST_NAME = forms.CharField(max_length=20, label = ("First Name"), 
. . . 
class Meta: 
    model = APPLICANT_DATA 
    fields = ('FIRST_NAME', 'LAST_NAME', 'MIDDLE_NAME',)

錯誤的是（1048，「列FKEY」不能爲空「）

對不起如果這是一個新手問題

來源

2015-10-07 Juan Carlos Asuncion