IntegrityError: valeur null dans la colonne “email” viole non-nulle contrainte

Je viens de commencer à apprendre Django. Alors que je suis en train de créer un utilisateur très simple fonction registre(avec PSQL),mais j'ai toujours eu ce message:

Erreur d'intégrité: valeur null dans la colonne "email" viole non-nulle contrainte
Je pense qu'il ya quelque chose de mal avec ma base de données. Mais je ne pouvais pas comprendre pourquoi..

Je suis en utilisant Django 1.5.1 et PSQL 9.1.9
MERCI BEAUCOUP!!

models.py:

from django.db import models
class User(models.Model):
    name = models.CharField(max_length=30)
    email = models.EmailField(verbose_name='e-mail')
    password = models.CharField(max_length=16)

views.py:

from portfolioSite.forms import register_form
from django.shortcuts import render
from django.http import HttpResponseRedirect
from portfolioSite.models import User

def register(request):
    if request.method == 'POST':
        registerForm = register_form(request.POST)
        if registerForm.is_valid():
            User.objects.create(name = registerForm.cleaned_data['name'],
                email = registerForm.cleaned_data['email'],
                password = registerForm.cleaned_data['password2'])
        return HttpResponseRedirect('/success/')
    else:
        registerForm = register_form()
    return render(request, 'register_form.html', {'form':registerForm})

Traceback:

File "/usr/local/lib/python2.7/dist-packages/django/core/handlers/base.py" in get_response
115.                         response = callback(request, *callback_args, **callback_kwargs)
File "/home/guangyi/Django/projects/mysite/portfolioSite/views.py" in register
13.                               password = registerForm.cleaned_data['password2']
File "/usr/local/lib/python2.7/dist-packages/django/db/models/manager.py" in create
149.         return self.get_query_set().create(**kwargs)
File "/usr/local/lib/python2.7/dist-packages/django/db/models/query.py" in create
402.         obj.save(force_insert=True, using=self.db)
File "/usr/local/lib/python2.7/dist-packages/django/db/models/base.py" in save
546.                        force_update=force_update, update_fields=update_fields)
File "/usr/local/lib/python2.7/dist-packages/django/db/models/base.py" in save_base
650.                 result = manager._insert([self], fields=fields, return_id=update_pk, using=using, raw=raw)
File "/usr/local/lib/python2.7/dist-packages/django/db/models/manager.py" in _insert
215.         return insert_query(self.model, objs, fields, **kwargs)
File "/usr/local/lib/python2.7/dist-packages/django/db/models/query.py" in insert_query
1661.     return query.get_compiler(using=using).execute_sql(return_id)
File "/usr/local/lib/python2.7/dist-packages/django/db/models/sql/compiler.py" in execute_sql
937.             cursor.execute(sql, params)
File "/usr/local/lib/python2.7/dist-packages/django/db/backends/util.py" in execute
41.             return self.cursor.execute(sql, params)
File "/usr/local/lib/python2.7/dist-packages/django/db/backends/postgresql_psycopg2/base.py" in execute
56.             six.reraise(utils.IntegrityError, utils.IntegrityError(*tuple(e.args)), sys.exc_info()[2])
File "/usr/local/lib/python2.7/dist-packages/django/db/backends/postgresql_psycopg2/base.py" in execute
54.             return self.cursor.execute(query, args)
Exception Type: IntegrityError at /register/
Exception Value: null value in column "email" violates not-null constraint

- Je vérifier ma db, j'ai vu qu'il y est une table appelée porfolioSite_user, mais quand je le laisse tomber, psql m'a dit que le tableau n'est pas la sortie...si confus....