old_contents: from django.db import models
  # Create your models here.
  
  class Subscriber(models.Model):
      email = models.EmailField()
      valid = models.BooleanField(default=True)
  
  class Repo(models.Model):
      name = models.CharField(max_length=256)
      owner = models.CharField(max_length=256)
  
  class Idea(models.Model):
      subscribers = models.ManyToManyField(Subscriber, related_name='ideas')
      repository = models.ForeignKey(Repo, related_name='ideas')
      github_id = models.PositiveIntegerField()
  
new_contents: from django.db import models
  # Create your models here.
  
  class Subscriber(models.Model):
      email = models.EmailField()
      valid = models.BooleanField(default=True)
  
  class Repo(models.Model):
      name = models.CharField(max_length=256)
      owner = models.CharField(max_length=256)
  
      def full_repository_name(self):
          return '{}/{}'.format(owner, name)
  
  class Idea(models.Model):
      subscribers = models.ManyToManyField(Subscriber, related_name='ideas')
      repository = models.ForeignKey(Repo, related_name='ideas')
      github_id = models.PositiveIntegerField()
  
subject: Add a full_repository_name method on Repo model