numerous updates

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),
+        ),
+    ]