numerous updates

physics/admin.py

@@ -24,7 +24,7 @@ class QuestionAdmin(VersionAdmin):
     #)
 
 class CidUserInline(admin.TabularInline):
-    model = Exam.valid_users.through
+    model = Exam.valid_cid_users.through
     extra = 1
 
 class ExamAdmin(VersionAdmin, admin.ModelAdmin):

physics/migrations/0020_rename_valid_users_exam_valid_cid_users.py

@@ -0,0 +1,18 @@
+# Generated by Django 3.2.13 on 2022-05-20 10:45
+
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('physics', '0019_exam_authors_only'),
+    ]
+
+    operations = [
+        migrations.RenameField(
+            model_name='exam',
+            old_name='valid_users',
+            new_name='valid_cid_users',
+        ),
+    ]

physics/migrations/0021_exam_valid_user_users.py

@@ -0,0 +1,20 @@
+# Generated by Django 3.2.13 on 2022-05-20 12:42
+
+from django.conf import settings
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        migrations.swappable_dependency(settings.AUTH_USER_MODEL),
+        ('physics', '0020_rename_valid_users_exam_valid_cid_users'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='exam',
+            name='valid_user_users',
+            field=models.ManyToManyField(blank=True, related_name='user_physics_exams', to=settings.AUTH_USER_MODEL),
+        ),
+    ]

physics/models.py

@@ -152,10 +152,14 @@ class Exam(ExamBase):
         related_name="physics_exam_author",
     )
 
-    valid_users = models.ManyToManyField(
+    valid_cid_users = models.ManyToManyField(
         CidUser, blank=True, related_name="physics_exams"
     )
 
+    valid_user_users = models.ManyToManyField(
+        settings.AUTH_USER_MODEL, blank=True, related_name="user_physics_exams"
+    )
+
     def get_take_url(self):
         return reverse("physics:exam_start", kwargs={"pk": self.pk})