created custom user model and user manager

app/app/settings.py

@@ -128,3 +128,5 @@
 # https://docs.djangoproject.com/en/3.2/ref/settings/#default-auto-field
 
 DEFAULT_AUTO_FIELD = 'django.db.models.BigAutoField'
+
+AUTH_USER_MODEL = 'core.User'

app/core/migrations/0001_initial.py

@@ -0,0 +1,33 @@
+# Generated by Django 3.2.22 on 2023-11-01 12:14
+
+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.BigAutoField(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')),
+                ('is_superuser', models.BooleanField(default=False, help_text='Designates that this user has all permissions without explicitly assigning them.', verbose_name='superuser status')),
+                ('email', models.EmailField(max_length=255, unique=True)),
+                ('name', models.CharField(max_length=255)),
+                ('is_active', models.BooleanField(default=True)),
+                ('is_staff', models.BooleanField(default=False)),
+                ('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={
+                'abstract': False,
+            },
+        ),
+    ]

app/core/models.py

@@ -1,3 +1,34 @@
-from django.db import models  # noqa
+"""
+Database models
+"""
+from django.db import models
+from django.contrib.auth.models import (
+    AbstractBaseUser,
+    BaseUserManager,
+    PermissionsMixin
+)
 
-# Create your models here.
+
+class UserManager(BaseUserManager):
+    """Manager for users"""
+
+    def create_user(self, email, password=None, **extra_field):
+        """Create, save and return a new user"""
+        user = self.model(email, **extra_field)
+        user.set_password(password)
+
+        user.save(using=self._db)
+
+        return user
+
+
+class User(AbstractBaseUser, PermissionsMixin):
+    """User in the system.."""
+    email = models.EmailField(max_length=255, unique=True)
+    name = models.CharField(max_length=255)
+    is_active = models.BooleanField(default=True)
+    is_staff = models.BooleanField(default=False)
+
+    objects = UserManager()
+
+    USERNAME_FIELD = 'email'

app/core/tests/test_models.py

@@ -0,0 +1,37 @@
+"""
+Tests for models
+"""
+
+from django.test import TestCase
+from django.contrib.auth import get_user_model
+
+
+class ModelTests(TestCase):
+    """Test models.."""
+
+    def test_create_user_with_email_successful(self):
+        """Test creating a user with an email is successful.."""
+        email = 'test@example.com'
+        password = 'testpass123'
+
+        user = get_user_model().objects.create(
+            email=email,
+            password=password
+        )
+
+        self.assertEqual(user.email, email)
+        self.assertTrue(user.check_password(password))
+
+
+    def test_new_user_email_normalized(self):
+        """Test email is normalised for new users"""
+        sample_emails = [
+            ['test1@EXAMPLE.com', 'test1@example.com'],
+            ['Test2@Example.com', 'Test2@example.com'],
+            ['TEST3@EXAMPLE.com', 'TEST3@example.com'],
+            ['test4@example.COM', 'test4@example.com']
+        ]
+
+        for email, expected in sample_emails:
+            user = get_user_model().objects.create(email=email, password='sample123')
+            self.assertEqual(user.email, expected)