from pydantic import BaseModel, ConfigDict
from datetime import datetime
from typing import Optional


class BaseSchema(BaseModel):
    """基础数据模型，对应原 alien-entity 的公共基类"""
    model_config = ConfigDict(from_attributes=True)
    
    id: Optional[int] = None
    created_time: Optional[datetime] = None
    updated_time: Optional[datetime] = None
    delete_flag: int = 0