python - 我如何捕获/排除 Django 的注册错误？

Question

我希望能够在用户尝试注册但注册失败时向用户返回一条消息。 我已经尝试了以下所有方法:

  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"

当然，以上都行不通。如何正确抛出异常？

Answer 1

我前段时间遇到了同样的问题，这是我的解决方案:

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)