Add migrations md to html

ram/roster/migrations/0011_md_to_html.py

@@ -0,0 +1,34 @@
+# Generated by Django 4.1 on 2022-08-24 15:30
+
+import markdown
+from django.db import migrations
+
+
+def md_to_html(apps, schema_editor):
+    fields = {
+        'RollingStock': ['notes'],
+    }
+
+    for m in fields.items():
+        model = apps.get_model('roster', m[0])
+
+        for row in model.objects.all():
+            for field in m[1]:
+                field = getattr(row, field)
+                field = markdown.markdown(field)
+
+            row.save(update_fields=m[1])
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("roster", "0010_alter_rollingstock_notes"),
+    ]
+
+    operations = [
+        migrations.RunPython(
+            md_to_html,
+            reverse_code=migrations.RunPython.noop
+        ),
+    ]