from django.db import models from users.models import CustomUser class Event(models.Model): date = models.DateTimeField() capacity = models.IntegerField() class EventRegistration(models.Model): REGISTRATION_STATE = ( ('I', 'Interested'), ('A', 'Admitted'), ('D', 'Denied'), ) event_id = models.ForeignKey(Event, on_delete=models.CASCADE) user_id = models.ForeignKey(CustomUser, on_delete=models.CASCADE) state = models.CharField(max_length=1, choices=REGISTRATION_STATE)