45 lines
1.5 KiB
Python
45 lines
1.5 KiB
Python
from sqlalchemy import create_engine, event
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from sqlalchemy.ext.declarative import declarative_base
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from sqlalchemy.orm import sessionmaker
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from app.core.config import settings
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engine = create_engine(
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settings.DATABASE_URL,
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pool_pre_ping=True,
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pool_recycle=settings.DB_POOL_RECYCLE_SEC,
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pool_size=settings.DB_POOL_SIZE,
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max_overflow=settings.DB_MAX_OVERFLOW,
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pool_reset_on_return="rollback",
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connect_args={
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"connect_timeout": settings.DB_CONNECT_TIMEOUT_SEC,
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"read_timeout": settings.DB_READ_TIMEOUT_SEC,
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"write_timeout": settings.DB_WRITE_TIMEOUT_SEC,
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},
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echo=settings.DEBUG,
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)
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# 避免 commit 后 ORM 实例自动过期，导致读取字段时回表 SELECT（高频接口会显著拖慢）
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SessionLocal = sessionmaker(autocommit=False, autoflush=False, expire_on_commit=False, bind=engine)
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Base = declarative_base()
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def get_db():
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"""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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@event.listens_for(Base, "before_insert", propagate=True)
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def _auto_fill_create_dept_id(mapper, connection, target):
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"""ORM before_insert 钩子：当 create_dept_id 为空时，自动从请求上下文填充当前用户部门 ID"""
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if hasattr(target, "create_dept_id") and not getattr(target, "create_dept_id", None):
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from app.core.context import current_user_dept_id
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dept_id = current_user_dept_id.get("")
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if dept_id:
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target.create_dept_id = dept_id
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