Question

I am trying to register users using the Django UserProfile capability. I have an Extended UserProfile model. My files look like below. I am getting “accounts_userprofile.u_id may not be NULL’, i tried using ‘commit=false’ when saving the form, but it didn’t work. My parent model has the fields set to null= True, blank = True. I have dropped the table and added it a couple of times, but nothing worked. Please help. Thanks in advance

My Models are below:

class UserBase(models.Model):
class Meta:
    abstract = True
    u_id = models.IntegerField(null = True,blank = True)
    email = models.CharField(max_length=200, null = True,blank = True)
    website=models.CharField(max_length=200, null = True, blank = True)
    age = models.IntegerField(blank = True, null = True)
    location = models.CharField(max_length= 200, null=True, blank = True)
    username = models.CharField(max_length = 100, null = True, blank = True)

The UserProfile Model is as follows:

class UserProfile(UserBase):
user = models.ForeignKey(User, null= True, blank = True, unique = True)

User.profile = property(lambda u: UserProfile.objects.get_or_create(user=u)[0]) 
def __unicode__(self):
    return "User Profile for: " + self.user.username

def create_user_profile(sender, **kw):
user = kw[‘instance’]
if kw[‘created’]:
up = UserProfile(user=user)

    up.save()

post_save.connect(create_user_profile, sender = User, dispatch_uid =”user_create_profile”)

My registration View is below:

def register(request, template_name=”registration/register.html”):
if request.method == ‘POST’:

  postdata = request.POST.copy()
  form = UserCreationForm(postdata)
  if form.is_valid(): 

      un = postdata.get('username','')
      pw = postdata.get('password1','')

      from django.contrib.auth import login, authenticate

      new_user = authenticate(username=un, password=pw)
      form.save()
      #if new_user and new_user.is_active:
          #login(request, new_user)
          #url = urlresolvers.reverse('my_account')
          #return HttpResponseRedirect(url)

else:
form = UserCreationForm()
page_title = ‘User Registration’
return render_to_response(template_name, locals(),
context_instance=RequestContext(request))>

Answer 1

From Django Docs:

https://docs.djangoproject.com/en/1.4/ref/models/fields/

Field.unique

If True, this field must be unique throughout the table.

This is enforced at the database level and by model validation. If you
try to save a model with a duplicate value in a unique field, a
django.db.IntegrityError will be raised by the model’s save() method.

This option is valid on all field types except ManyToManyField and
FileField.

You are telling UserProfiles that the UserProfiles.u_id is unique, it’s not (blanks/null). So you’re getting the error. You may want to consider changing u_id to be a AutoField primary_key. And then connect them using models.ForeignKey(‘UserBase’)