old_contents: from django.db import models
  
  # Create your models here.
  
new_contents: from django.db import models
  from django.contrib.auth.models import User
  
  class BlogPost(models.Model):
      user = models.ForeignKey(User)
      title = models.CharField(max_lenght = 120)
      text = models.TextField()
      date = models.DateTimeField(auto_now_add = True)
  
  class Comment(models.Model):
      user = models.ForeignKey(User)
      post = models.ForeignKey(BlogPost)
      text = models.TextField()
      date = models.DateTimeField(auto_now_add = True)
  
subject: Add BlogPost and Comment models