feat: initial commit and ignore qwen files

backend/app/database.py

@@ -0,0 +1,67 @@
+"""数据库连接与会话管理模块"""
+from sqlalchemy import create_engine
+from sqlalchemy.orm import sessionmaker, declarative_base
+from app.config import settings
+
+# 处理兼容：如果设置了 DATABASE_URL（单数据库模式），则两个都使用它
+if settings.DATABASE_URL:
+    inventory_url = settings.DATABASE_URL
+    pms_url = settings.DATABASE_URL
+else:
+    inventory_url = settings.DATABASE_URL_INVENTORY
+    pms_url = settings.DATABASE_URL_PMS
+
+# ============ 库存数据库（只读）============
+
+engine_inventory = create_engine(
+    inventory_url,
+    pool_pre_ping=True,
+    pool_size=5,
+    max_overflow=10,
+    # 库存数据库只读，不需要写入优化
+)
+
+SessionLocalInventory = sessionmaker(autocommit=False, autoflush=False, bind=engine_inventory)
+
+
+def get_db_inventory():
+    """获取库存数据库会话的依赖函数（只读）"""
+    db = SessionLocalInventory()
+    try:
+        yield db
+    finally:
+        db.close()
+
+
+# ============ PMS 数据库（可读写）============
+
+engine_pms = create_engine(
+    pms_url,
+    pool_pre_ping=True,
+    pool_size=10,
+    max_overflow=20,
+)
+
+SessionLocalPMS = sessionmaker(autocommit=False, autoflush=False, bind=engine_pms)
+
+
+def get_db_pms():
+    """获取 PMS 数据库会话的依赖函数（可读写）"""
+    db = SessionLocalPMS()
+    try:
+        yield db
+    finally:
+        db.close()
+
+
+# ============ 兼容旧接口 ============
+
+# 为向后兼容提供默认的 engine 和 SessionLocal
+engine = engine_pms
+SessionLocal = SessionLocalPMS
+Base = declarative_base()
+
+
+def get_db():
+    """获取数据库会话的依赖函数（兼容旧接口，默认使用 PMS 数据库）"""
+    yield from get_db_pms()