Only one assignment record per user

[edumed.git] / wtem / models.py

diff --git a/wtem/models.py b/wtem/models.py
index 90492bf..9e67ad8 100644 (file)
--- a/wtem/models.py
+++ b/wtem/models.py
@@ -49,7 +49,7 @@ class Attachment(models.Model):
 
 
 class Assignment(models.Model):
-    user = models.ForeignKey(User)
+    user = models.ForeignKey(User, unique = True)
     exercises = JSONField()
 
     def clean(self):