old_contents: from django.db import models
  
  # Create your models here.
  
new_contents: from django.db import models
  
  from products.models import Product
  
  class Review(models.Model):
      product = models.ForeignKey(Product)
      user = models.ForeignKey(settings.AUTH_USER_MODEL)
      RATING_CHOICES = (
  	(1, 1),
  	(2, 2),
  	(3, 3),
  	(4, 4),
      )
      rating = models.IntegerField(choices=RATING_CHOICES)
      comments = models.TextField()   
  
      def __unicode__(self):
          return self.product.name + ", " + str(self.user) + ", " + str(self.rating)
  
subject: Create model Review