switch exam questions to a sorted m2m

anatomy/migrations/0006_auto_20201129_0955.py

@@ -0,0 +1,25 @@
+# Generated by Django 3.1.3 on 2020-11-29 09:55
+
+from django.db import migrations, models
+import sortedm2m.fields
+from sortedm2m.operations import AlterSortedManyToManyField
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('anatomy', '0005_auto_20201126_1730'),
+    ]
+
+    operations = [
+        #migrations.AddField(
+        #    model_name='anatomyquestion',
+        #    name='open_access',
+        #    field=models.BooleanField(default=True, help_text='If an question should be freely available to browse'),
+        #),
+        AlterSortedManyToManyField(
+            model_name='exam',
+            name='exam_questions',
+            field=sortedm2m.fields.SortedManyToManyField(blank='true', help_text=None, related_name='exams', to='anatomy.AnatomyQuestion'),
+        ),
+    ]

anatomy/models.py

@@ -9,6 +9,8 @@ from django.urls import reverse
 
 from django.utils.translation import ugettext_lazy as _
 
+from sortedm2m.fields import SortedManyToManyField
+
 image_storage = FileSystemStorage(
     # Physical file location ROOT
     location=u"{0}/anatomy/".format(settings.MEDIA_ROOT),
@@ -201,7 +203,7 @@ class Answer(models.Model):
 
 class Exam(models.Model):
     name = models.CharField(max_length=200)
-    exam_questions = models.ManyToManyField(AnatomyQuestion,
+    exam_questions = SortedManyToManyField(AnatomyQuestion,
                                             related_name="exams", blank="true")
 
     active = models.BooleanField(help_text="If an exam should be available",