Question

I want to be able to return a message to the user when they try to register but their registration fails.
I have tried all of the following methods:

  try:
    user = User.objects.create_user(username, email, password)
  except User.DoesNotExist
    print "aaaa"

  try:
    user = User.objects.create_user(username, email, password)
  except IntegrityError
    print "aaaa"

Of course, neither of the above work. How do I properly throw an exception?

Answer 1

I had the same problem some time ago, here’s my solution:

try:
    user = User.objects.get(username=new_username)
    # ERROR! user already exists!
    # if you're using a form you could do:
    # raise forms.ValidationError('Already exists a user with this username!')        
except User.DoesNotExist:
    # We're good!, lets create the user
    user = User.objects.create_user(username, email, password)