text: from django.db import models
  from django.urls import reverse
  
  class Product(models.Model):
      title = models.CharField(max_length=200)
      manufacturer = models.ForeignKey(
          'auth.User',
          on_delete=models.CASCADE,
      )
      description = models.TextField()
  
      def __str__(self):
          return self.title
  
      def get_absolute_url(self):
          return reverse('product_detail', args=[self.id])