Question

I am having problem saving additional information about each user automatically when a new user signs-up. I have created a profile for User model extension to save additional data about my users. However, when the signal handler gets called at post_save, the data stored in the request is not passed to the signal_handler.

The following is the profile that I have created.

class StudentProfile(models.Model):

    user = models.ForeignKey(User, unique=True)

    # Other information about the Student
    city = models.CharField(max_length=25)
    country = models.CharField(max_length=25)
    student_age = models.IntegerField(max_length=3)

In my signup view I call form.save() function in which the User object gets created and a new row is added in the data base.

def save(self, new_data):
    u = User.objects.create_user( new_data['username'],
                                new_data['email'],
                                new_data['password'])
    return u

After that, the post_save signal is called and the signal handler tries to create a new profile:

def create_student_profile(sender, instance, created, **kwargs):
    if created:
        StudentProfile.objects.create(user=instance)

post_save.connect(create_student_profile, sender=User)

At this point, I get the following error in the broswer:

IntegrityError at /signup/
(1048, “Column ‘student_age’ cannot be null”)

I looked at the call stack and found that the SQL query that is being executed has None value for Student_age and nothing for country and city.

sql u’INSERT INTO student_studentprofile (user_id, city, country, student_age) VALUES (17, , , None)’

How can I pass the request parameters such as student_age, country and city to this signal handler? Do I have to manually save this information?

I have thoroughly searched for the answer of this question on stackOverflow and Google and I have come rather empty handed.

Thanks for your help.

Answer 1

Yep, unfortunately you’ll need to make those fields nullable. Then set them in your view after the user has been saved.