初始提交：极码 GeekCode 全栈项目（FastAPI + Vue3）

backend/database.py

@@ -0,0 +1,34 @@
+"""数据库连接配置"""
+from sqlalchemy import create_engine
+from sqlalchemy.ext.declarative import declarative_base
+from sqlalchemy.orm import sessionmaker
+from config import DATABASE_URL
+
+# 根据数据库类型配置引擎参数
+if "sqlite" in DATABASE_URL:
+    engine = create_engine(DATABASE_URL, connect_args={"check_same_thread": False})
+else:
+    engine = create_engine(
+        DATABASE_URL,
+        pool_size=10,
+        max_overflow=20,
+        pool_recycle=3600,
+        pool_pre_ping=True,
+    )
+
+SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)
+Base = declarative_base()
+
+
+def get_db():
+    """获取数据库会话的依赖注入"""
+    db = SessionLocal()
+    try:
+        yield db
+    finally:
+        db.close()
+
+
+def init_db():
+    """初始化数据库，创建所有表"""
+    Base.metadata.create_all(bind=engine)