Django 模型正在从另一个模型继承“密码”字段，它的 PK 并在 PostgreSQL 中显示

Question

编辑：+ 患者

当我检查我的代码时，我注意到某些模型具有属性“密码”作为 PostgreSQL 中的数据库列，而这些模型没有该属性，属性“密码”和表之间的唯一关系是表的模型有一个指向作为 AbstractBaseUser 扩展的模型的 FK。

django = ">=2.1.0"
djangorestframework = ">=3.9.2"
flake8 = ">=3.6.0,<3.7.0"
autopep8 = "*"
psycopg2 = "<2.8.0,>=2.7.5"
django-organizations = "==1.1.2"
django-countries = "*"

[requires]
python_version = "3.7"


from django.db import models
from django.contrib.auth.models import AbstractBaseUser, BaseUserManager, \
    PermissionsMixin
import datetime
from django.core.validators import MaxValueValidator
from django_countries.fields import CountryField

# Create your models here.


class UserManager(BaseUserManager):

  def create_user(self, email, password = None, ** kwargs):
  ""
"Creates and saves a new User"
""
if not email:
  raise ValueError('Users must have an email address')
user = self.model(email = self.normalize_email(email), ** kwargs)
user.set_password(password)
user.is_staff = False
user.is_active = True
user.is_doctor = False
user.save(using = self._db)

return user

def create_superuser(self, email, password, ** kwargs):
  ""
"Creates and saves a new super user"
""
user = self.create_user(email, password, ** kwargs)
user.is_staff = False
user.is_active = True
user.is_doctor = False
user.is_superuser = True
user.save(using = self._db)

return user

class User(AbstractBaseUser, PermissionsMixin):
  ""
"Custom user model that supports using email instead of username"
""
email = models.EmailField(max_length = 254, unique = True)
firstName = models.CharField(max_length = 30)
middleName = models.CharField(max_length = 30, blank = True)
firstSurname = models.CharField(max_length = 50)
lastSurname = models.CharField(max_length = 50, blank = True)
passwordHint = models.CharField(max_length = 20, blank = True, null = True)
creationDate = models.DateField(
  default = datetime.date.today, blank = False, null = False)
lastLoginDate = models.DateField(
  blank = True, null = True)
lastPasswordResetDate = models.DateField(blank = True, null = True)
is_active = models.BooleanField(
  default = True)
is_staff = models.BooleanField(
  default = False)
is_doctor = models.BooleanField(
  default = False)
externalUserCode = models.CharField(max_length = 20, blank = True, null = True)

objects = UserManager()
USERNAME_FIELD = 'email'

class Doctor(AbstractBaseUser):
    """Custom user that has the information of the doctors"""
    doctorID = models.OneToOneField(
        User, on_delete=models.CASCADE, primary_key=True)
    specialtyID = models.ManyToManyField(DoctorSpecialties)
    identificationTypeID = models.ForeignKey('generic.IdentificationType',
                                             on_delete=models.CASCADE)
    identificationTypeNumber = models.PositiveIntegerField(
        validators=[MaxValueValidator(9999999999)])

class Patient(AbstractBaseUser):
    """Custom user that has the information of the patient"""
    id = models.AutoField(primary_key=True)
    patient = models.ForeignKey(User, on_delete=models.CASCADE)
    identificationType = models.ForeignKey('genericWS.IdentificationType',
                                           on_delete=models.CASCADE)
    identificationNumber = models.CharField(max_length=30, null=False)
    patientAddress = models.CharField(max_length=30, null=False)

问题是我有一个表 public.noteapp_patient 和 public.noteapp_doctor 的列名“密码”，我不知道它们为什么存在，因为我没有在模型中声明该属性。

Answer 1

正如 Daniel 在 cmets 中所写，这是预期的行为。您的类Doctor 和Patient 继承自AbstractBaseUser，因此它们还将具有fields defined in AbstractBaseUser，即password、last_login 和is_active

查看django documentation on abstract base model classes 了解更多信息。 如果继承的概念对您来说是新概念，您可以在 Internet 上找到一些教程（例如 this one）来解释这一点。

此外，您似乎想对User、Doctor 和Patient 使用多态性。您可能想看看django-polymorphic，这对您有很大帮助。