add photo data migration

Author: gardenerik

bullet/gallery/migrations/0005_migrate_photos.py

@@ -0,0 +1,37 @@
+# Generated by Django 5.1.5 on 2025-06-03 09:58
+
+import shutil
+from pathlib import Path
+from typing import TYPE_CHECKING
+
+from django.db import migrations
+
+from gallery.thumbnails import resize_photo
+
+if TYPE_CHECKING:
+    from gallery.models import Photo
+
+
+def migrate_photos(apps, schema_editor):
+    Photo: "Photo" = apps.get_model("gallery", "Photo")
+
+    for photo in Photo.objects.all():
+        image_path = Path(photo.image.path)
+        if not image_path.exists():
+            photo.delete()
+            continue
+
+        photo.image.save(image_path.name, photo.image)
+        old_dir = image_path.with_suffix("")
+        if old_dir.exists():
+            shutil.rmtree(old_dir)
+
+        resize_photo(photo)
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ("gallery", "0004_alter_photo_image"),
+    ]
+
+    operations = [migrations.RunPython(migrate_photos)]