keymedia/managemedia/models/books.py

from django.db import models
from .common import CommonMediaFields
class Book(CommonMediaFields):
     author = models.ForeignKey('Author', on_delete=models.CASCADE)
     series = models.ForeignKey('Series', on_delete=models.CASCADE, blank=True)
     series_entry = models.BooleanField('Series Entry', blank=True)
     is_comic = models.BooleanField('Comic')
     is_manga = models.BooleanField('Manga')
     
class Author(models.Model):
     name = models.CharField('Author', unique=True)
     sort_name = models.CharField('Author sort name', blank=True)
     
class Series(models.Model):
     name = models.CharField('Series', unique=True)
     total_entries = models.PositiveIntegerField('Total Entries', blank=True)