sessions, or something

backend/playlist/models/vote.py

@@ -1,6 +1,7 @@
 from django.db import models
 from django.contrib.auth.models import User
 from django.core.validators import MinValueValidator, MaxValueValidator
+from .session import Session
 
 class Vote(models.Model):
     class Meta:
@@ -9,3 +10,4 @@ class Vote(models.Model):
     user = models.ForeignKey(User, on_delete=models.CASCADE)
     points = models.IntegerField(validators=[MinValueValidator(1), MaxValueValidator(5)])
     skipped = models.BooleanField(default=False)
+    session = models.ForeignKey(Session, on_delete=models.CASCADE, null=True, default=None)