Fixes #19825: Prevent inaccurate config revision activation when not intended (#20219)

netbox/core/migrations/0019_configrevision_active.py

@@ -0,0 +1,48 @@
+# Generated by Django 5.2.5 on 2025-09-09 16:48
+
+from django.db import migrations, models
+
+
+def get_active(apps, schema_editor):
+    from django.core.cache import cache
+    ConfigRevision = apps.get_model('core', 'ConfigRevision')
+    version = None
+    revision = None
+
+    # Try and get the latest version from cache
+    try:
+        version = cache.get('config_version')
+    except Exception:
+        pass
+
+    # If there is a version in cache, attempt to set revision to the current version from cache
+    # If the version in cache does not exist or there is no version, try the lastest revision in the database
+    if not version or (version and not (revision := ConfigRevision.objects.filter(pk=version).first())):
+        revision = ConfigRevision.objects.order_by('-created').first()
+
+    # If there is a revision set, set the active revision
+    if revision:
+        revision.active = True
+        revision.save()
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('core', '0018_concrete_objecttype'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='configrevision',
+            name='active',
+            field=models.BooleanField(default=False),
+        ),
+        migrations.RunPython(code=get_active, reverse_code=migrations.RunPython.noop),
+        migrations.AddConstraint(
+            model_name='configrevision',
+            constraint=models.UniqueConstraint(
+                condition=models.Q(('active', True)), fields=('active',), name='unique_active_config_revision'
+            ),
+        ),
+    ]