How to delete the first name and last name columns in django user model?

问题

I created a custom user model just like the docs said, when I ran the makemigrations I went to the folder of migrations and deleted the first name and last name columns inside the 0001_initial.py and then I ran the migrate command, but when I ran the createsuperuser command it throwed an error in the terminal that django.db.utils.OperationalError: no such column: myapp_usermodel.first_name

How can I fix this? I want to delete the first name and last name columns because I'm not using them

EDIT: this is the user model

from django.db import models
from django.utils.translation import gettext_lazy as _
from django.contrib.auth.models import AbstractUser

# Create your models here.
class usermodel(AbstractUser):
    email = models.EmailField(max_length=60)
    username = models.CharField(max_length=20, unique=True)
    password = models.CharField(max_length=20)
    
    def __str__(self):
        return self.username

回答1:

I went to the folder of migrations and deleted the first name and last name columns inside the 0001_initial.py

You shouldn't do that. This will indeed prevent Django from creating the columns. But now it will each time query under the impression that the columns are there. Furthermore if you make migrations again, it will try to add extra columns.

You should simply use the method resolution order (MRO) and set the field to None:

class usermodel(AbstractUser):
    first_name = None
    last_name = None
    
    def __str__(self):
        return self.username

You probably also better remove the table in the database and the migration file and make migrations again, and migrate the database.

来源：https://stackoverflow.com/questions/64391320/how-to-delete-the-first-name-and-last-name-columns-in-django-user-model