old_contents: from django.db import models
  
  class Winery(models.Model):
      title = models.CharField(max_length=150)
  
      def __str__(self):
          return self.title
  
  class Wine(models.Model):
      title = models.CharField(max_length=150)
      vintage = models.IntegerField()
      winery = models.ForeignKey(Winery)
  
      def __str__(self):
          return '{winery} {wine} {vintage}'.format(
              winery=self.winery, wine=self.title, vintage=self.vintage)
  
  class Note(models.Model):
      wine = models.ForeignKey(Wine)
  
      def __str__(self):
          return 'Tasting note for: {wine}'.format(wine=self.wine)
new_contents: from django.db import models
  
  class Winery(models.Model):
      title = models.CharField(max_length=150)
      description = models.TextField(blank=True)
  
      def __str__(self):
          return self.title
  
  class Wine(models.Model):
      title = models.CharField(max_length=150)
      vintage = models.IntegerField()
      description = models.TextField(blank=True)
      winery = models.ForeignKey(Winery)
  
      def __str__(self):
          return '{winery} {wine} {vintage}'.format(
              winery=self.winery, wine=self.title, vintage=self.vintage)
  
  class Note(models.Model):
      wine = models.ForeignKey(Wine)
  
      def __str__(self):
          return 'Tasting note for: {wine}'.format(wine=self.wine)
subject: Add description field to Winery and Wine models.