setting fallback_to_env_var should be respected in api calls (#2058)

src/backend/base/langflow/helpers/flow.py

@@ -8,7 +8,7 @@ from sqlmodel import Session, select
 from langflow.graph.schema import RunOutputs
 from langflow.schema.schema import INPUT_FIELD_NAME, Record
 from langflow.services.database.models.flow import Flow
-from langflow.services.deps import get_session, session_scope
+from langflow.services.deps import get_session, get_settings_service, session_scope
 
 if TYPE_CHECKING:
     from langflow.graph.graph.base import Graph
@@ -88,7 +88,9 @@ async def run_flow(
         inputs_components.append(input_dict.get("components", []))
         types.append(input_dict.get("type", "chat"))
 
-    return await graph.arun(inputs_list, inputs_components=inputs_components, types=types)
+    fallback_to_env_vars = get_settings_service().settings.fallback_to_env_var
+
+    return await graph.arun(inputs_list, inputs_components=inputs_components, types=types, fallback_to_env_vars=fallback_to_env_vars)
 
 
 def generate_function_for_flow(

src/backend/base/langflow/processing/process.py

@@ -8,6 +8,7 @@ from langflow.graph.schema import RunOutputs
 from langflow.graph.vertex.base import Vertex
 from langflow.schema.graph import InputValue, Tweaks
 from langflow.schema.schema import INPUT_FIELD_NAME
+from langflow.services.deps import get_settings_service
 from langflow.services.session.service import SessionService
 
 if TYPE_CHECKING:
@@ -49,6 +50,8 @@ async def run_graph_internal(
         inputs_list.append({INPUT_FIELD_NAME: input_value_request.input_value})
         types.append(input_value_request.type)
 
+    fallback_to_env_vars = get_settings_service().settings.fallback_to_env_var
+
     run_outputs = await graph.arun(
         inputs_list,
         components,
@@ -56,6 +59,7 @@ async def run_graph_internal(
         outputs or [],
         stream=stream,
         session_id=session_id_str or "",
+        fallback_to_env_vars=fallback_to_env_vars
     )
     if session_id_str and session_service:
         await session_service.update_session(session_id_str, (graph, artifacts))

src/backend/base/langflow/services/settings/base.py

@@ -78,6 +78,7 @@ class Settings(BaseSettings):
     langchain_cache: str = "InMemoryCache"
     load_flows_path: Optional[str] = None
 
+
     # Redis
     redis_host: str = "localhost"
     redis_port: int = 6379