Add migration to invert the sort_order field on featured pages

programs/migrations/0022_reverse_featured_pages_sort_order.py

@@ -0,0 +1,31 @@
+# Generated by Django 3.2.18 on 2024-03-08 19:16
+
+from django.db import migrations
+
+
+def reverse_featured_pages(apps, schema_editor):
+    FeaturedProgramPage = apps.get_model('programs', 'FeaturedProgramPage')
+    Program = apps.get_model('programs', 'Program')
+
+    for program in Program.objects.all():
+        items_to_update = []
+        if not program.featured_pages.exclude(sort_order__isnull=True).exists():
+            continue
+        for i, featured_page in enumerate(program.featured_pages.order_by('-sort_order')):
+            featured_page.sort_order = i
+            items_to_update.append(featured_page)
+        FeaturedProgramPage.objects.bulk_update(
+            items_to_update,
+            ['sort_order'],
+        )
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('programs', '0021_remove_legacy_subscribe_page_models'),
+    ]
+
+    operations = [
+        migrations.RunPython(reverse_featured_pages),
+    ]