Understanding relationships in django

Question

I'm new to django. I'm struggling with relationships. I have 4 apps (app1, app2, app3, app4). App2, 3 and 4 have the same fields. And those fields have to be in app1. How can i write my models? Please help. For example app1 is movies(with title and location), app2 is music(with title and location) and app3 is ballet(with title and location). App1 has to be cinema where we have movies, music performances and ballets.

Answer 1

I am not sure your business model, I presume:

class Cinema:
    movies = models.ManyToManyField('app1.Movie')
    music = models.ManyToManyField('app2.Music')
    etc...

Alternatively, if you want movies to assign to one cinema only:

class Movie:
    cinema = models.ForeignKey('app1.Cinema', related_name='movies')