NOT NULL constraint failed

Question

Could someone smart explain me please where I have a bug?

I get this error when I would like to send a profile user form

NOT NULL constraint failed: userprofile_userprofile.godzina_id

I have an app "userprofile"

forms.py from django import forms from models import UserProfile

class UserProfileForm(forms.ModelForm):

    class Meta:
        model = UserProfile
        fields = ('imie', 'godzina')

views.py

from django.shortcuts import render
from django.http import HttpResponseRedirect
from django.core.context_processors import csrf
from forms import UserProfileForm
from django.contrib.auth.decorators import login_required
from django.conf import settings

@login_required
def user_profile(request):
    if request.method == 'POST':
        form = UserProfileForm(request.POST, instance=request.user.profile)
        if form.is_valid():
            form.save()
            return HttpResponseRedirect('/accounts/loggedin')
    else:
        user = request.user
        profile = user.profile
        form = UserProfileForm(instance=profile)
        args = {}
        args.update(csrf(request))
        args['form'] = form
        return render(request, 'user_profile.html', args)

models.py:

from django.db import models
from django.contrib.auth.models import User
from godzina.models import Godzina

class UserProfile(models.Model):
    user = models.OneToOneField(User)
    imie = models.CharField(max_length=150)
    godzina = models.ForeignKey('godzina.Godzina')   


User.profile = property(lambda u:UserProfile.objects.get_or_create(user=u)[0])

Answer 1

您可以将null=True添加到您的godzina属性：

godzina = models.ForeignKey('godzina.Godzina', null=True)