View difference between Paste ID: RqypHNEE and gpgT4JCv

 # testdb/models.py
 from django.db import models
 
 
 class Author(models.Model):
     last_name = models.CharField(max_length=200)
     first_name = models.CharField(max_length=200)
     birth_date = models.DateField()
 
     class Meta:
         db_table = 'authors'
 
 
 class Language(models.Model):
     name = models.CharField(max_length=200)
 
     class Meta:
         db_table = 'languages'
 
 
 class Book(models.Model):
     title = models.CharField(max_length=200)
     authors = models.ManyToManyField(Author)
     available_languages = models.ManyToManyField(Language)
 
     class Meta:
         db_table = 'books'