40 lines
1001 B
Python
40 lines
1001 B
Python
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"""数据库连接与初始化"""
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from pathlib import Path
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from sqlalchemy import create_engine, event
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from sqlalchemy.orm import sessionmaker, declarative_base
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from config import settings
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engine = create_engine(
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f"sqlite:///{settings.database_path}",
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connect_args={"check_same_thread": False},
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echo=False,
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)
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SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)
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Base = declarative_base()
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@event.listens_for(engine, "connect")
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def _set_sqlite_pragma(dbapi_conn, connection_record):
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"""启用 SQLite 外键约束"""
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cursor = dbapi_conn.cursor()
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cursor.execute("PRAGMA foreign_keys=ON")
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cursor.close()
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def get_db():
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"""FastAPI 依赖注入用数据库会话"""
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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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"""创建所有数据表，并确保数据库目录存在"""
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Path(settings.DATABASE_URL).parent.mkdir(parents=True, exist_ok=True)
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Base.metadata.create_all(bind=engine)
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