Rain-Bus
f1be24ab83
- Add FastAPI app with paper browsing UI and REST API - Add crawler service and database models - Add scripts for DB init and manual crawl - Add docs (api-and-ui, data-model, services) - Add requirements and project config
42 lines
1005 B
Python
42 lines
1005 B
Python
"""数据库引擎、会话工厂、初始化。"""
|
|
|
|
from sqlalchemy import event, create_engine
|
|
from sqlalchemy.orm import DeclarativeBase, sessionmaker
|
|
|
|
from app.config import settings
|
|
|
|
|
|
class Base(DeclarativeBase):
|
|
pass
|
|
|
|
|
|
def _make_engine():
|
|
"""创建 SQLite 引擎，启用 foreign_keys。"""
|
|
engine = create_engine(
|
|
settings.DATABASE_URL,
|
|
echo=settings.APP_DEBUG,
|
|
connect_args={"check_same_thread": False},
|
|
)
|
|
|
|
@event.listens_for(engine, "connect")
|
|
def _set_sqlite_pragma(dbapi_connection, _connection_record):
|
|
cursor = dbapi_connection.cursor()
|
|
cursor.execute("PRAGMA foreign_keys=ON")
|
|
cursor.execute("PRAGMA journal_mode=WAL")
|
|
cursor.close()
|
|
|
|
return engine
|
|
|
|
|
|
engine = _make_engine()
|
|
SessionLocal = sessionmaker(bind=engine, autoflush=False, autocommit=False)
|
|
|
|
|
|
def get_db():
|
|
"""FastAPI 依赖注入：获取数据库会话。"""
|
|
db = SessionLocal()
|
|
try:
|
|
yield db
|
|
finally:
|
|
db.close()
|