add db backup function

translator/migrations/0031_translated_content_new_hash.py

@@ -1,7 +1,7 @@
 # Generated by Django 5.0.4 on 2024-05-18 00:00
 
 from django.db import migrations, models
-
+from . import backup_db
 
 class Migration(migrations.Migration):
 
@@ -15,4 +15,5 @@ class Migration(migrations.Migration):
             name='new_hash',
             field=models.CharField(default='new', editable=False, max_length=39),
         ),
+        migrations.RunPython(backup_db),
     ]

translator/migrations/__init__.py

@@ -0,0 +1,17 @@
+import os
+import logging
+import shutil
+from django.conf import settings
+def backup_db(apps, schema_editor):
+    db_path = settings.DATABASES['default']['NAME']
+    backup_path = f'{db_path}.bak'
+    try:
+        if os.path.exists(backup_path):
+            os.remove(backup_path)
+        shutil.copyfile(db_path, backup_path)
+    except FileNotFoundError:
+        logging.error(f"Database file {db_path} not found.")
+    except PermissionError:
+        logging.error(f"Permission denied when accessing {db_path} or {backup_path}.")
+    except Exception as e:
+        logging.error(f"Error occurred during database backup: {str(e)}")