feat: Add optional target handle name in get_result method.

src/backend/base/langflow/graph/vertex/base.py

@@ -583,7 +583,7 @@ def _is_list_of_vertices(self, value):
         """
         return all(self._is_vertex(vertex) for vertex in value)
 
-    async def get_result(self, requester: "Vertex") -> Any:
+    async def get_result(self, requester: "Vertex", target_handle_name: Optional[str] = None) -> Any:
         """
         Retrieves the result of the vertex.
 
@@ -593,9 +593,9 @@ async def get_result(self, requester: "Vertex") -> Any:
             The result of the vertex.
         """
         async with self._lock:
-            return await self._get_result(requester)
+            return await self._get_result(requester, target_handle_name)
 
-    async def _get_result(self, requester: "Vertex") -> Any:
+    async def _get_result(self, requester: "Vertex", target_handle_name: Optional[str] = None) -> Any:
         """
         Retrieves the result of the built component.
 
@@ -620,7 +620,7 @@ async def _build_vertex_and_update_params(self, key, vertex: "Vertex"):
         Builds a given vertex and updates the params dictionary accordingly.
         """
 
-        result = await vertex.get_result(self)
+        result = await vertex.get_result(self, target_handle_name=key)
         self._handle_func(key, result)
         if isinstance(result, list):
             self._extend_params_list_with_result(key, result)

src/backend/base/langflow/graph/vertex/types.py

@@ -84,7 +84,7 @@ def get_edge_with_target(self, target_id: str) -> Generator["CycleEdge", None, N
             if edge.target_id == target_id:
                 yield edge
 
-    async def _get_result(self, requester: "Vertex") -> Any:
+    async def _get_result(self, requester: "Vertex", target_handle_name: str | None = None) -> Any:
         """
         Retrieves the result of the built component.