Django_使用django自带的user做外键

一、使用django自带的user做外键，可以直接在model中使用。只需导入settings模块

使用方法：
在app应用（此处是Product应用）中的models.py文件，导入settings模块

# Product / models.py
from django.db import models
from django.contrib.auth import settings


class Product(models.Model):
    productName = models.CharField('产品名称', max_length=20)
    productDescription = models.CharField('产品描述', max_length=100)
    producer = models.ForeignKey(settings.AUTH_USER_MODEL, verbose_name='负责人',                          on_delete=models.SET_NULL,blank=True, null=True)
    createTime = models.DateTimeField('创建时间', auto_now=True)

    class Meta:
        verbose_name = '产品管理'
        verbose_name_plural = '产品管理'

    def __str__(self):
        return self.productName

二、自定义User Model

方法一、扩展AbstractUser类：只增加字段

app/models.py

from django.contrib.auth.models import AbstractUser
from django.db import models

class NewUser(AbstractUser):
	new_field = models.CharField(max_length=100)

同时，需要在global_settings文件中设置：

AUTH_USER_MODEL  = "app.NewUser"

方法二、扩展AbstractBaseUser类
AbstractBaseUser中只包含3个field: password, last_login和is_active. 扩展方式同上

# django.contrib.auth.base_user
class AbstractBaseUser(models.Model):
    password = models.CharField(_('password'), max_length=128)
    last_login = models.DateTimeField(_('last login'), blank=True, null=True)

    is_active = True

    REQUIRED_FIELDS = []

    # Stores the raw password if set_password() is called so that it can
    # be passed to password_changed() after the model is saved.
    _password = None

    class Meta:
        abstract = True

    def __str__(self):
        return self.get_username()

    def save(self, *args, **kwargs):
        super().save(*args, **kwargs)
        if self._password is not None:
            password_validation.password_changed(self._password, self)
            self._password = None

    def get_username(self):
        """Return the username for this User."""
        return getattr(self, self.USERNAME_FIELD)

    def clean(self):
        setattr(self, self.USERNAME_FIELD, self.normalize_username(self.get_username()))

    def natural_key(self):
        return (self.get_username(),)

    @property
    def is_anonymous(self):
        """
        Always return False. This is a way of comparing User objects to
        anonymous users.
        """
        return False

    @property
    def is_authenticated(self):
        """
        Always return True. This is a way to tell if the user has been
        authenticated in templates.
        """
        return True

    def set_password(self, raw_password):
        self.password = make_password(raw_password)
        self._password = raw_password

    def check_password(self, raw_password):
        """
        Return a boolean of whether the raw_password was correct. Handles
        hashing formats behind the scenes.
        """
        def setter(raw_password):
            self.set_password(raw_password)
            # Password hash upgrades shouldn't be considered password changes.
            self._password = None
            self.save(update_fields=["password"])
        return check_password(raw_password, self.password, setter)

    def set_unusable_password(self):
        # Set a value that will never be a valid hash
        self.password = make_password(None)

    def has_usable_password(self):
        """
        Return False if set_unusable_password() has been called for this user.
        """
        return is_password_usable(self.password)

    def get_session_auth_hash(self):
        """
        Return an HMAC of the password field.
        """
        key_salt = "django.contrib.auth.models.AbstractBaseUser.get_session_auth_hash"
        return salted_hmac(key_salt, self.password).hexdigest()

    @classmethod
    def get_email_field_name(cls):
        try:
            return cls.EMAIL_FIELD
        except AttributeError:
            return 'email'

    @classmethod
    def normalize_username(cls, username):
        return unicodedata.normalize('NFKC', username) if isinstance(username, str) else username