mirror of
https://github.com/Cccc-owo/CheckInApp.git
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57 lines
1.6 KiB
Python
57 lines
1.6 KiB
Python
from datetime import datetime, timezone
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from sqlalchemy import DateTime, create_engine, event, inspect
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from sqlalchemy.orm import DeclarativeBase, sessionmaker
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from backend.config import settings
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# 创建数据库引擎
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engine = create_engine(
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settings.DATABASE_URL,
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connect_args={"check_same_thread": False}, # SQLite 特定配置
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echo=False, # 生产环境设为 False
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)
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# 创建会话工厂
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SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)
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class Base(DeclarativeBase):
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pass
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# SQLite timezone 修复：在加载对象后，将所有 naive datetime 转换为 UTC timezone-aware
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@event.listens_for(Base, "load", propagate=True)
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def receive_load(target, context):
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"""在从数据库加载对象后，将所有 datetime 字段转换为 timezone-aware (UTC)"""
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mapper = inspect(target).mapper
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for attr in mapper.column_attrs:
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column = attr.columns[0]
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if not isinstance(column.type, DateTime):
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continue
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try:
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attr_value = getattr(target, attr.key)
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except (AttributeError, TypeError):
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continue
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if isinstance(attr_value, datetime) and attr_value.tzinfo is None:
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try:
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setattr(target, attr.key, attr_value.replace(tzinfo=timezone.utc))
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except (AttributeError, TypeError):
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continue
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def get_db():
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"""依赖注入：获取数据库会话"""
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db = SessionLocal()
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try:
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yield db
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finally:
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db.close()
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def init_db():
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"""初始化数据库：创建所有表"""
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Base.metadata.create_all(bind=engine)
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