Hello,
I have problem with inserting duplicate rows into DB.
There is registration form on my site. User fill email address together
with additional parameters (form definition: http://dpaste.com/19959/).
After POST it to the server, email is checked in form against DB. If
user with same email exists, form error is generated.
If form is valid (ie. user doesn't exists) I make another test in the
view and then call my function for creating whole new account:
f_email = form.cleaned_data['email']
if User.objects.filter(email__exact=f_email).count() == 0:
create_account(form.cleaned_data)
In the create_account I try to create new user like this:
user = User.objects.create_user(username, form['email'],
form['password1'])
But this code *sometimes* throw exception:
[...]
File "[...]/accounts/models.py", line 259, in create_account
user = User.objects.create_user(username, form['email'],
form['password1'])
File "[...]/lib/python2.4/django_live/django/contrib/auth/models.py",
line 96, in create_user
user.save()
File "[...]/lib/python2.4/django_live/django/db/models/base.py", line
249, in save
','.join(placeholders)), db_values)
File
"[...]/lib/python2.4/django_live/django/db/backends/postgresql/base.py",
line 53, in execute
return self.cursor.execute(smart_str(sql, self.charset),
self.format_params(params))
IntegrityError: ERROR: duplicate key violates unique constraint
"auth_user_username_key"
In my settings I have defined Transaction Middleware:
MIDDLEWARE_CLASSES = (
'django.middleware.common.CommonMiddleware',
'django.middleware.transaction.TransactionMiddleware',
'django.contrib.sessions.middleware.SessionMiddleware',
'django.contrib.auth.middleware.AuthenticationMiddleware',
'django.middleware.doc.XViewMiddleware',
)
Could you give me some advice, where could be the problem?
Thank you for any help.
Regards
Michal
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