update pay function

concept_api.py

@@ -110,7 +110,7 @@ class SearchRequest(BaseModel):
     semantic_weight: Optional[float] = Field(None, ge=0.0, le=1.0, description="语义搜索权重(0-1)，None表示自动计算")
     filter_stocks: Optional[List[str]] = Field(None, description="过滤特定股票代码或名称")
     trade_date: Optional[date] = Field(None, description="交易日期，格式：YYYY-MM-DD，默认返回最新日期数据")
-    sort_by: str = Field("change_pct", description="排序方式: change_pct, _score, stock_count, concept_name")
+    sort_by: str = Field("change_pct", description="排序方式: change_pct, _score, stock_count, concept_name, added_date")
     use_knn: bool = Field(True, description="是否使用KNN搜索优化语义搜索")
 
 
@@ -721,6 +721,14 @@ async def search_concepts(request: SearchRequest):
             all_results.sort(key=lambda x: x.stock_count, reverse=True)
         elif request.sort_by == "concept_name":
             all_results.sort(key=lambda x: x.concept)
+        elif request.sort_by == "added_date":
+            # 按添加日期排序（降序 - 最新的在前）
+            all_results.sort(
+                key=lambda x: (
+                    x.happened_times[0] if x.happened_times and len(x.happened_times) > 0 else '1900-01-01'
+                ),
+                reverse=True
+            )
         # _score排序已经由ES处理
 
         # 计算分页