Django 如何在用户模型中添加用户外键？

Question

我试图在用户模型中插入用户的外键，但我一直收到错误。作为用户，我想有两个目的，我可以做一本书来照顾我的宠物，也可以照顾其他宠物

class User(AbstractBaseUser, PermissionsMixin):
  name = models.CharField(max_length=255, default='John Doe')
  pet_sitter = models.ForeignKey('User',on_delete=models.CASCADE)//--->User inside User
  I tried get_user_model() it showed errors too//
  pet_appointments= models.ManyToManyField(
    'User',
    through=Booking,
    through_fields=('patient', 'doctor')
    )

class Booking(models.Model):
  start_date = models.DateTimeField()  
  end_date = models.DateTimeField()
  owner_of_pet = models.ForeignKey(get_user_model(),related_name = "User",on_delete=models.CASCADE, blank=True,null=True)
  sitter = models.ForeignKey('User', on_delete=models.CASCADE)

    

enter code here
===============

error
django.core.exceptions.ImproperlyConfigured: AUTH_USER_MODEL refers to model 'api.User' that has not been installed

Answer 1

似乎您在 api 应用程序中定义了一些 User，因此将该应用程序添加到 settings.py 中已安装的应用程序中：

# settings.py
INSTALLED_APPS = [
    ...
    "api",

此外，实际上不可能也不需要以这种方式引用 User。

我想象你的 models.py 是这样的：

from api.models import CustomUser
from django.db import models


class Pet(models.Model):
    name = models.CharField(max_length=100)
    pet_sitter = models.ForeignKey(CustomUser, on_delete=models.CASCADE)
    owner = models.ForeignKey(CustomUser, on_delete=models.CASCADE, related_name='pets', blank=True,null=True)

class Booking(models.Model):
    pet = models.ForeignKey(Pet, on_delete=models.CASCADE)
    start_date = models.DateTimeField()  
    end_date = models.DateTimeField()

在这里查看源代码：https://github.com/almazkun/petshop

Django 如何在用户模型中添加用户外键？

Django How to add a User Foreignkey inside a User model?

python

django

django-models

foreign-keys

many-to-many