1from django.db import models
 2from events.models import Event
 3
 4class Track(models.Model): 5    name = models.CharField(max_length=2147483647)
 6    description = models.TextField(null=True, blank=True)
 7    color = models.CharField(max_length=2147483647)

1from django.db import models
2from events.models import Event
3
4class SessionType(models.Model):5    name = models.CharField(max_length=2147483647)
6    length = models.CharField(max_length=2147483647)
7    event = models.ForeignKey(Event, on_delete=models.CASCADE, null=True, blank=True)

 5from tracks.models import Track
 6from users.models import CustomUser
 7
 8class CustomSession(models.Model): 9    title = models.CharField(max_length=2147483647)
10    subtitle = models.CharField(max_length=2147483647, null=True, blank=True)
11    short_abstract = models.TextField(null=True, blank=True)