完善训练链路接口与PDF下载

app/services/order_service.py

@@ -39,11 +39,11 @@ class OrderService:
 
     def create_physical_exam_order(self, session_id: int, user_id: str, item_code: str) -> CreateOrderResponse:
         """体格检查结果：复用检查申请逻辑，结果仍只来自数据库。"""
-        return self.create_order(session_id, user_id, item_code)
+        return self._create_order(session_id, user_id, item_code, require_physical=True)
 
     def create_auxiliary_exam_order(self, session_id: int, user_id: str, item_code: str) -> CreateOrderResponse:
         """辅助检查结果：复用检查申请逻辑，结果仍只来自数据库。"""
-        return self.create_order(session_id, user_id, item_code)
+        return self._create_order(session_id, user_id, item_code, require_physical=False)
 
     def _items_response(self, items) -> OrderItemsResponse:
         """检查列表响应：把 ORM 检查项转换成前端列表结构。"""
@@ -64,6 +64,10 @@ class OrderService:
 
     def create_order(self, session_id: int, user_id: str, item_code: str) -> CreateOrderResponse:
         """检查申请：从数据库读取检查结果并写入当前会话记录。"""
+        return self._create_order(session_id, user_id, item_code)
+
+    def _create_order(self, session_id: int, user_id: str, item_code: str, require_physical: bool | None = None) -> CreateOrderResponse:
+        """检查申请：统一校验会话、项目类型和幂等逻辑，检查结果只来自数据库。"""
         session = self._get_session(session_id, user_id)
         if session.status not in {"inquiry", "diagnosis", "treatment"}:
             raise AppError("SESSION_STATUS_INVALID", "current session does not allow ordering", 400)
@@ -71,6 +75,8 @@ class OrderService:
         item = self.case_repo.get_exam_item(session.case_id, item_code)
         if not item:
             raise AppError("ORDER_ITEM_NOT_FOUND", "order item not found for current case", 404)
+        if require_physical is not None and self._is_physical_item(item) != require_physical:
+            raise AppError("ORDER_ITEM_TYPE_MISMATCH", "order item type does not match current exam endpoint", 400)
 
         existing_order = self.session_repo.get_order_by_item(session.id, item.item_code)
         if existing_order: