Add support for input values in build_vertex API

src/backend/langflow/api/v1/chat.py

@@ -1,10 +1,11 @@
 import time
 import uuid
-from typing import TYPE_CHECKING, Optional
+from typing import TYPE_CHECKING, Annotated, Optional
 
 from fastapi import (
     APIRouter,
     BackgroundTasks,
+    Body,
     Depends,
     HTTPException,
     WebSocket,
@@ -21,6 +22,7 @@ from langflow.api.utils import (
     format_exception_message,
 )
 from langflow.api.v1.schemas import (
+    InputValueRequest,
     ResultDataResponse,
     StreamData,
     VertexBuildResponse,
@@ -139,10 +141,12 @@ async def build_vertex(
     flow_id: str,
     vertex_id: str,
     background_tasks: BackgroundTasks,
+    inputs: Annotated[InputValueRequest, Body(embed=True)] = None,
     chat_service: "ChatService" = Depends(get_chat_service),
     current_user=Depends(get_current_active_user),
 ):
     """Build a vertex instead of the entire graph."""
+    {"inputs": {"input_value": "some value"}}
     start_time = time.perf_counter()
     try:
         start_time = time.perf_counter()
@@ -163,7 +167,7 @@ async def build_vertex(
         vertex = graph.get_vertex(vertex_id)
         try:
             if not vertex.pinned or not vertex._built:
-                await vertex.build(user_id=current_user.id)
+                await vertex.build(user_id=current_user.id, inputs=inputs.model_dump())
 
             if vertex.result is not None:
                 params = vertex._built_object_repr()

src/backend/langflow/api/v1/schemas.py

@@ -261,3 +261,7 @@ class VertexBuildResponse(BaseModel):
 
 class VerticesBuiltResponse(BaseModel):
     vertices: List[VertexBuildResponse]
+
+
+class InputValueRequest(BaseModel):
+    input_value: str

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

@@ -2,13 +2,16 @@ import ast
 import inspect
 import types
 from enum import Enum
-from typing import (TYPE_CHECKING, Any, Callable, Coroutine, Dict, List,
-                    Optional)
+from typing import TYPE_CHECKING, Any, Callable, Coroutine, Dict, List, Optional
 
 from loguru import logger
 
-from langflow.graph.schema import (INPUT_COMPONENTS, OUTPUT_COMPONENTS,
-                                   InterfaceComponentTypes, ResultData)
+from langflow.graph.schema import (
+    INPUT_COMPONENTS,
+    OUTPUT_COMPONENTS,
+    InterfaceComponentTypes,
+    ResultData,
+)
 from langflow.graph.utils import UnbuiltObject, UnbuiltResult
 from langflow.graph.vertex.utils import generate_result
 from langflow.interface.initialize import loading
@@ -608,6 +611,7 @@ class Vertex:
     async def build(
         self,
         user_id=None,
+        inputs: Optional[Dict[str, Any]] = None,
         requester: Optional["Vertex"] = None,
         **kwargs,
     ) -> Any:
@@ -620,6 +624,9 @@ class Vertex:
             return self.get_requester_result(requester)
         self._reset()
 
+        if inputs and self.is_input:
+            self.update_raw_params(inputs)
+
         # Run steps
         for step in self.steps:
             if step not in self.steps_ran: