models.py

from __future__ import unicode_literals

from django.contrib.auth.models import AbstractBaseUser, BaseUserManager, PermissionsMixin
from django.core.mail import send_mail
from django.db import models
from django.utils import timezone
from django.utils.translation import gettext_lazy as _


class UserManager(BaseUserManager):
    def create_user(self, email, password=None, **kwargs):
        email = self.normalize_email(email)
        user = self.model(email=email, **kwargs)
        user.set_password(password)
        user.save(using=self._db)
        return user

    def create_superuser(self, **kwargs):
        kwargs.setdefault('is_staff', True)
        kwargs.setdefault('is_superuser', True)

        if kwargs.get('is_staff') is not True:
            raise ValueError('Superuser must have is_staff=True.')
        if kwargs.get('is_superuser') is not True:
            raise ValueError('Superuser must have is_superuser=True.')

        return self.create_user(**kwargs)

    def get_by_natural_key(self, email):
        normalized_email = self.normalize_email(email)
        return self.get(**{self.model.USERNAME_FIELD: normalized_email})


class AbstractEmailUser(AbstractBaseUser, PermissionsMixin):
    email = models.EmailField(_('email address'), max_length=255, unique=True)

    is_staff = models.BooleanField(_('staff status'), default=False,
        help_text=_('Designates whether the user can log into this admin '
                    'site.'))
    is_active = models.BooleanField(_('active'), default=True,
        help_text=_('Designates whether this user should be treated as '
                    'active. Unselect this instead of deleting accounts.'))
    date_joined = models.DateTimeField(_('date joined'), default=timezone.now)

    objects = UserManager()

    USERNAME_FIELD = 'email'
    REQUIRED_FIELDS = []

    class Meta:
        abstract = True
        ordering = ['email']

    def clean(self):
        super().clean()
        self.email = self.__class__.objects.normalize_email(self.email)

    def get_full_name(self):
        return self.email

    def get_short_name(self):
        return self.email

    def email_user(self, subject, message, from_email=None, **kwargs):
        """Sends an email to this User."""

        send_mail(subject, message, from_email, [self.email], **kwargs)

class AbstractNamedUser(AbstractEmailUser):
    name = models.CharField(_('name'), max_length=255)

    REQUIRED_FIELDS = ['name']

    class Meta:
        abstract = True
        ordering = ['name', 'email']

    def __str__(self):
        return '{name} <{email}>'.format(
            name=self.name,
            email=self.email,
        )

    def get_full_name(self):
        return self.name

    def get_short_name(self):
        return self.name


class User(AbstractNamedUser):
    class Meta(AbstractNamedUser.Meta):
        swappable = 'AUTH_USER_MODEL'
        verbose_name = _('user')
        verbose_name_plural = _('users')