Merge pull request mixcloud#171 from mixcloud/millar-patch-1

Explicitly delete on cascade

Author: millar

experiments/models.py

@@ -106,8 +106,8 @@ def to_dict_serialized(self):
 
 class Enrollment(models.Model):
     """ A participant in a split testing experiment """
-    user = models.ForeignKey(getattr(settings, 'AUTH_USER_MODEL', 'auth.User'))
-    experiment = models.ForeignKey(Experiment)
+    user = models.ForeignKey(getattr(settings, 'AUTH_USER_MODEL', 'auth.User'), on_delete=models.CASCADE)
+    experiment = models.ForeignKey(Experiment, on_delete=models.CASCADE)
     enrollment_date = models.DateTimeField(auto_now_add=True)
     last_seen = models.DateTimeField(null=True)
     alternative = models.CharField(max_length=50)