998211c483
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48 lines
1.5 KiB
Python
48 lines
1.5 KiB
Python
"""基础模型定义"""
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from datetime import datetime
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from typing import Optional
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from sqlalchemy import Column, DateTime, Integer, Boolean, func
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from sqlalchemy.ext.declarative import declarative_base
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from sqlalchemy.orm import Mapped, mapped_column
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# 创建基础模型类
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Base = declarative_base()
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class BaseModel(Base):
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"""
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基础模型类，所有模型都应继承此类
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包含通用字段：id, created_at, updated_at
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时区：使用北京时间（Asia/Shanghai, UTC+8）
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"""
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__abstract__ = True
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__allow_unmapped__ = True # SQLAlchemy 2.0 兼容性
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id: Mapped[int] = mapped_column(Integer, primary_key=True, index=True)
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created_at: Mapped[datetime] = mapped_column(
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DateTime, server_default=func.now(), nullable=False, comment="创建时间（北京时间）"
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)
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updated_at: Mapped[datetime] = mapped_column(
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DateTime, server_default=func.now(), onupdate=func.now(), nullable=False, comment="更新时间（北京时间）"
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)
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class SoftDeleteMixin:
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"""软删除混入类"""
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__allow_unmapped__ = True
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is_deleted: Mapped[bool] = mapped_column(Boolean, default=False, nullable=False)
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deleted_at: Mapped[Optional[datetime]] = mapped_column(DateTime, nullable=True)
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class AuditMixin:
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"""审计字段混入类"""
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__allow_unmapped__ = True
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created_by: Mapped[Optional[int]] = mapped_column(Integer, nullable=True)
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updated_by: Mapped[Optional[int]] = mapped_column(Integer, nullable=True)
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