Django用户模型用户名（唯一= False）

Question

I have seen many of the solution but none of it seems to be answering the question.

My user model is using AbstractUser right now. Is there a way to make username(unique = False)

Since i wanted to allow user to ba able to have duplication of same username, as the login im am using is by email address and password

Below is the code that i tried but doesnt work.

Code:

class MyUser(AbstractUser):
    username = models.CharField(max_length=30, unique=False)

error:

customuser.MyUser: (auth.E003) 'MyUser.username' must be unique because it is named as the 'USERNAME_FI ELD'

Answer 1

Try to specify email as username field with USERNAME_FIELD attribute:

class MyUser(AbstractUser):
    username = models.CharField(max_length=30, unique=False)
    USERNAME_FIELD = 'email'

Answer 2

class MyUser(AbstractUser):
    username = models.CharField(max_length=30, unique=False)
    email = models.EmailField(max_length=255, unique=True)
    USERNAME_FIELD = 'email'

Answer 3

A non-unique username field is allowed if you use a custom authentication backend that can support it.

If you want to use django's default authentication backend you cannot make username non unique.

You will have to implement a class with get_user(user_id) and authenticate(request, **credentials) methods for a custom backend.

You can read it in the documentation here. https://docs.djangoproject.com/en/2.1/topics/auth/customizing/#specifying-custom-user-model