Adding a custom User model

core/admin.py

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+from django.contrib import admin
+
+from .models import User
+
+
+@admin.register(User)
+class UserAdmin(admin.ModelAdmin):
+    search_fields = ("id", "email", "first_name", "last_name")
+    list_display = (
+        "id",
+        "first_name",
+        "last_name",
+        "is_active",
+        "email",
+        "date_joined",
+    )

core/apps.py

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+from django.apps import AppConfig
+
+
+class CoreConfig(AppConfig):
+    name = 'core'

core/managers.py

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+from django.contrib.auth.base_user import BaseUserManager
+
+
+class UserManager(BaseUserManager):
+    use_in_migrations = True
+
+    def _create_user(self, email, password, **extra_fields):
+        """
+        Creates and saves a User with the given email and password.
+        """
+        if not email:
+            raise ValueError("The given email must be set")
+        email = self.normalize_email(email)
+        user = self.model(email=email, **extra_fields)
+        user.set_password(password)
+        user.save(using=self._db)
+        return user
+
+    def create_user(self, email, password=None, **extra_fields):
+        extra_fields.setdefault("is_superuser", False)
+        return self._create_user(email, password, **extra_fields)
+
+    def create_superuser(self, email, password, **extra_fields):
+        extra_fields.setdefault("is_superuser", True)
+
+        if extra_fields.get("is_superuser") is not True:
+            raise ValueError("Superuser must have is_superuser=True.")
+
+        return self._create_user(email, password, **extra_fields)

core/migrations/0001_initial.py

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+# Generated by Django 3.1.3 on 2020-11-05 00:51
+
+import core.managers
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    initial = True
+
+    dependencies = [
+        ('auth', '0012_alter_user_first_name_max_length'),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='User',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('password', models.CharField(max_length=128, verbose_name='password')),
+                ('last_login', models.DateTimeField(blank=True, null=True, verbose_name='last login')),
+                ('email', models.EmailField(max_length=254, unique=True, verbose_name='E-mail')),
+                ('first_name', models.CharField(blank=True, max_length=30, verbose_name='First name')),
+                ('last_name', models.CharField(blank=True, max_length=30, verbose_name='Last name')),
+                ('date_joined', models.DateTimeField(auto_now_add=True, verbose_name='date joined')),
+                ('is_active', models.BooleanField(default=True, verbose_name='User active?')),
+                ('is_staff', models.BooleanField(default=False, verbose_name='Staff?')),
+                ('is_superuser', models.BooleanField(default=False, verbose_name='Superuser?')),
+                ('groups', models.ManyToManyField(blank=True, help_text='The groups this user belongs to. A user will get all permissions granted to each of their groups.', related_name='user_set', related_query_name='user', to='auth.Group', verbose_name='groups')),
+                ('user_permissions', models.ManyToManyField(blank=True, help_text='Specific permissions for this user.', related_name='user_set', related_query_name='user', to='auth.Permission', verbose_name='user permissions')),
+            ],
+            options={
+                'verbose_name': 'User',
+                'verbose_name_plural': 'Users',
+                'db_table': 'users',
+                'ordering': ['first_name', 'last_name'],
+            },
+            managers=[
+                ('objects', core.managers.UserManager()),
+            ],
+        ),
+    ]

core/models.py

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+from django.db import models
+from django.contrib.auth.models import PermissionsMixin
+from django.contrib.auth.base_user import AbstractBaseUser
+
+from .managers import UserManager
+
+
+class User(AbstractBaseUser, PermissionsMixin):
+    email = models.EmailField("E-mail", unique=True)
+
+    first_name = models.CharField("First name", max_length=30, blank=True)
+    last_name = models.CharField("Last name", max_length=30, blank=True)
+
+    date_joined = models.DateTimeField("date joined", auto_now_add=True)
+
+    is_active = models.BooleanField("User active?", default=True)
+    is_staff = models.BooleanField("Staff?", default=False)
+    is_superuser = models.BooleanField("Superuser?", default=False)
+
+    objects = UserManager()
+
+    USERNAME_FIELD = "email"
+
+    class Meta:
+        ordering = ["first_name", "last_name"]
+        verbose_name = "User"
+        verbose_name_plural = "Users"
+        db_table = "users"
+
+    def get_full_name(self):
+        """
+        Returns the first_name plus the last_name, with a space in between.
+        """
+        full_name = f"{self.first_name} {self.last_name}"
+        return full_name.strip()
+
+    def get_short_name(self):
+        """
+        Returns the short name for the user.
+        """
+        return self.first_name or "Unamed"

core/tests.py

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+from django.test import TestCase
+
+# Create your tests here.

core/views.py

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+from django.shortcuts import render
+
+# Create your views here.