Fix: The dataset retrieval test returned an incorrect total number. (#15901)

### What problem does this PR solve?

Fix: The dataset retrieval test returned an incorrect total number.

### Type of change

- [x] Bug Fix (non-breaking change which fixes an issue)

---------

Co-authored-by: balibabu <assassin_cike@163.com>

api/apps/services/dataset_api_service.py

@@ -1429,7 +1429,6 @@ async def search_datasets(tenant_id: str, req: dict):
         except Exception:
             logging.warning("search_datasets KG retrieval failed: datasets=%s tenant=%s", kb_ids, tenant_id, exc_info=True)
     ranks["chunks"] = settings.retriever.retrieval_by_children(ranks["chunks"], tenant_ids)
-    ranks["total"] = len(ranks["chunks"])
 
     for c in ranks["chunks"]:
         c.pop("vector", None)

web/src/hooks/use-knowledge-request.ts

@@ -87,21 +87,24 @@ export const useTestRetrieval = () => {
   });
 
   const refetch = useCallback(() => {
+    setPage(1);
     if (queryParams.question) {
-      mutation.mutate(queryParams);
+      const newParams = { ...queryParams, page: 1 };
+      mutation.mutate(newParams);
     }
   }, [mutation, queryParams]);
 
   const onPaginationChange = useCallback(
     (newPage: number, newPageSize: number) => {
-      setPage(newPage);
+      const nextPage = newPageSize !== pageSize ? 1 : newPage;
+      setPage(nextPage);
       setPageSize(newPageSize);
       if (mutation.data && queryParams.question) {
-        const newParams = { ...queryParams, page: newPage, size: newPageSize };
+        const newParams = { ...queryParams, page: nextPage, size: newPageSize };
         mutation.mutate(newParams);
       }
     },
-    [mutation, queryParams],
+    [mutation, queryParams, pageSize],
   );
 
   const handleFilterSubmit = useCallback(

web/src/pages/dataset/testing/index.tsx

@@ -24,7 +24,7 @@ export default function RetrievalTesting() {
     filterValue,
   } = useTestRetrieval();
 
-  const [count] = useState(1);
+  const [count] = useState(1); // TODO: Different layouts are needed; if they are no longer required, consider deleting them.
 
   return (
     <div className="pr-5 pb-5">