[Django] Utiliser l'héritage dans nos modèles

examples.py

from my_app.models import *

my_books = Book.objects.all() #Search in Book only.
my_collection = Collection.objects.all() #Search in all collection.

for elem in my_collection:
	if elem.categorie == 'book':
		print(elem.book.author, elem.book.title)
	else:
		print(elem.music.artist, elem.music.album)

models.py

from django.db import models

CATEGORIES = [
	('book', 'book'),
	('music', 'music')
]

class Collection(models.Model):
	global CATEGORIES
	name = models.CharField(max_length=64)
	description = models.CharField(max_length=256)
	categorie = models.CharField(max_length=5, choices=CATEGORIES)

	def __str__(self):
		return self.title

	
class Music(Collection):
	title = models.CharField(max_length=64)
	artist = models.CharField(max_length=32)
	album = models.CharField(max_length=32)
	
	def __str__(self):
		return self.title


class Book(Collection):
	title = models.CharField(max_length=64)
	author = models.CharField(max_length=32)

	def __str__(self):
		return self.title