from django.db import models

class Author(models.Model):

    first_name = models.CharField(max_length=128)

    last_name = models.CharField(max_length=128)

class Editor(models.Model):

    name = models.CharField(max_length=128)

    bestselling_author = models.ForeignKey(Author, models.CASCADE)

class Book(models.Model):

    title = models.CharField(max_length=128)

    authors = models.ManyToManyField(Author)

    editor = models.ForeignKey(Editor, models.CASCADE, related_name="edited_books")

    class Meta:

        default_related_name = "books"

class Store(models.Model):

    name = models.CharField(max_length=128)

    address = models.CharField(max_length=128)

    class Meta:

        abstract = True

        default_related_name = "%(app_label)s_%(model_name)ss"

class BookStore(Store):

    available_books = models.ManyToManyField(Book)

class EditorStore(Store):

    editor = models.ForeignKey(Editor, models.CASCADE)

    available_books = models.ManyToManyField(Book)

    class Meta:

        default_related_name = "editor_stores"