.

physics/models.py

@@ -12,7 +12,7 @@ from django.utils.translation import gettext_lazy as _
 
 from sortedm2m.fields import SortedManyToManyField
 
-from generic.models import CidUser, ExamBase, QuestionNote
+from generic.models import CidUser, CidUserGroup, ExamBase, QuestionNote, UserUserGroup
 
 import reversion
 
@@ -131,7 +131,7 @@ class Question(models.Model):
         return [self.a, self.b, self.c, self.d, self.e]
 
 
-@reversion.register
+#@reversion.register
 class Exam(ExamBase):
     app_name = "physics"
 
@@ -160,6 +160,21 @@ class Exam(ExamBase):
         settings.AUTH_USER_MODEL, blank=True, related_name="user_physics_exams"
     )
 
+    cid_user_groups = models.ManyToManyField(
+        CidUserGroup,
+        blank=True,
+        help_text="These groups define which candidates are able to be added to the exams/collection.",
+        related_name="physics_cid_user_groups"
+
+    )
+
+    user_user_groups = models.ManyToManyField(
+        UserUserGroup,
+        blank=True,
+        help_text="These groups define which candidates are able to be added to the exams/collection.",
+        related_name="physics_user_user_groups"
+    )
+
     def get_take_url(self):
         return reverse("physics:exam_start", kwargs={"pk": self.pk})
 
@@ -179,6 +194,14 @@ class CidUserAnswer(models.Model):
 
     cid = models.IntegerField(blank=True, null=True)
 
+    user = models.ForeignKey(
+        settings.AUTH_USER_MODEL,
+        on_delete=models.CASCADE,
+        blank=True,
+        null=True,
+        related_name="user_physics_user_answers",
+    )
+
     # Each user answer is associated with a particular exam
     exam = models.ForeignKey(
         Exam, related_name="cid_user_answers", on_delete=models.CASCADE, null=True