.

sbas/migrations/0007_exam_valid_users.py

@@ -0,0 +1,19 @@
+# Generated by Django 3.2.8 on 2021-12-11 22:12
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('generic', '0015_ciduser_ciduserexam'),
+        ('sbas', '0006_alter_exam_open_access'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='exam',
+            name='valid_users',
+            field=models.ManyToManyField(blank=True, related_name='sba_exams', to='generic.CidUser'),
+        ),
+    ]

sbas/models.py

@@ -11,7 +11,7 @@ from django.utils.translation import ugettext_lazy as _
 
 from sortedm2m.fields import SortedManyToManyField
 
-from generic.models import ExamBase, QuestionNote
+from generic.models import CidUser, ExamBase, QuestionNote
 
 import reversion
 
@@ -159,6 +159,7 @@ class Exam(ExamBase):
                                     help_text='Author of exam',
                                     related_name="sba_exam_author")
 
+    valid_users = models.ManyToManyField(CidUser, blank=True, related_name="sba_exams")
 
 
 @reversion.register