text: import uuid
  import os
  from django.db import models
  from django.contrib.auth.models import AbstractBaseUser, BaseUserManager, \
                                          PermissionsMixin
  from django.conf import settings
  
  
  def recipe_image_file_path(instance, filename):
      """Generate file path for new recipe image"""
      ext = filename.split('.')[-1]
      filename = f'{uuid.uuid4()}.{ext}'
  
      return os.path.join('uploads/recipe/', filename)
  
  
  class UserManager(BaseUserManager):
  
      def create_user(self, email, password=None, **extra_fields):
          """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), **extra_fields)
          user.set_password(password)
          user.save(using=self._db)
  
          return user
  
      def create_superuser(self, email, password):
          """Creates and saves a new super user"""
          user = self.create_user(email, password)
          user.is_staff = True
          user.is_superuser = True
          user.save(using=self._db)
  
          return user
  
  
  class User(AbstractBaseUser, PermissionsMixin):
      """Custom user model that suppors using email instead of username"""
      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'
  
  
  class Tag(models.Model):
      """Tag to be used for a recipe"""
      name = models.CharField(max_length=255)
      user = models.ForeignKey(
          settings.AUTH_USER_MODEL,
          on_delete=models.CASCADE
      )
  
      def __str__(self):
          return self.name
  
  
  class Ingredient(models.Model):
      """Ingredient to be used in a recipe"""
      name = models.CharField(max_length=255)
      user = models.ForeignKey(
          settings.AUTH_USER_MODEL,
          on_delete=models.CASCADE
      )
  
      def __str__(self):
          return self.name
  
  
  class Recipe(models.Model):
      """Recipe object"""
      user = models.ForeignKey(
          settings.AUTH_USER_MODEL,
          on_delete=models.CASCADE
      )
      title = models.CharField(max_length=255)
      time_minutes = models.IntegerField()
      price = models.DecimalField(max_digits=5, decimal_places=2)
      link = models.CharField(max_length=255, blank=True)
      ingredients = models.ManyToManyField('Ingredient')
      tags = models.ManyToManyField('Tag')
      image = models.ImageField(null=True, upload_to=recipe_image_file_path)
  
      def __str__(self):
          return self.title
  