"""
修复 django_migrations 表中的旧 app 名称引用。
在服务器上执行: python manage.py shell < fix_migration_history.py
或: python manage.py shell
然后粘贴此脚本内容
"""
from django.db import connection

APP_NAME_MAPPINGS = {
    'houtai': 'backend',
    'yonghu': 'users',
    'dingdan': 'orders',
    'peizhi': 'config',
    'shangpin': 'products',
    'shangdian': 'shop',
    'dengji': 'rank',
}

with connection.cursor() as cursor:
    for old_name, new_name in APP_NAME_MAPPINGS.items():
        cursor.execute(
            "SELECT COUNT(*) FROM django_migrations WHERE app = %s",
            [old_name]
        )
        count = cursor.fetchone()[0]
        if count > 0:
            cursor.execute(
                "UPDATE django_migrations SET app = %s WHERE app = %s",
                [new_name, old_name]
            )
            print(f"已更新 {count} 条记录: {old_name} -> {new_name}")
        else:
            print(f"无需更新: {old_name} (无记录)")

print("\n修复完成！请运行 python manage.py migrate")