dosubot[bot]
commented
2 months ago The issue with the SubFlow component in Langflow Version 1.11 on Mac OSX with Python 3.10, where it shows "No Fields found" when selecting from the dropdown, is likely due to the update_build_config method not properly updating the build_config with the available flow names. Specifically, the build_config["flow_name"]["options"] is not being populated correctly.
Here is the relevant part of the code:
def update_build_config(self, build_config: dotdict, field_value: Any, field_name: str | None = None):
logger.debug(f"Updating build config with field value {field_value} and field name {field_name}")
if field_name == "flow_name":
build_config["flow_name"]["options"] = self.get_flow_names()
# Clean up the build config
for key in list(build_config.keys()):
if key not in self.field_order + ["code", "_type", "get_final_results_only"]:
del build_config[key]
if field_value is not None and field_name == "flow_name":
try:
flow_data = self.get_flow(field_value)
if not flow_data:
raise ValueError(f"Flow {field_value} not found.")
graph = Graph.from_payload(flow_data.data["data"])
# Get all inputs from the graph
inputs = get_flow_inputs(graph)
# Add inputs to the build config
build_config = self.add_inputs_to_build_config(inputs, build_config)
except Exception as e:
logger.error(f"Error getting flow {field_value}: {str(e)}")
return build_configThe get_flow_names method is supposed to return a list of flow names, but if list_flows does not return any flows or if there is an issue with fetching the flow names, the options list will remain empty, leading to "No Fields found" in the dropdown.
To resolve this, ensure that list_flows is correctly implemented and returning the expected flow data. Additionally, verify that get_flow_names is correctly extracting the flow names from the returned data. Here is the implementation of get_flow_names and get_flow:
def get_flow_names(self) -> List[str]:
flow_datas = self.list_flows()
return [flow_data.data["name"] for flow_data in flow_datas]
def get_flow(self, flow_name: str) -> Optional[Data]:
flow_datas = self.list_flows()
for flow_data in flow_datas:
if flow_data.data["name"] == flow_name:
return flow_data
return NoneAdditionally, ensure that the add_inputs_to_build_config method is correctly adding the inputs to the build_config:
def add_inputs_to_build_config(self, inputs: List[Vertex], build_config: dotdict):
new_fields: list[Input] = []
for vertex in inputs:
field = Input(
display_name=vertex.display_name,
name=vertex.id,
info=vertex.description,
field_type="str",
value=None,
)
new_fields.append(field)
logger.debug(new_fields)
for field in new_fields:
build_config[field.name] = field.to_dict()
return build_configBy ensuring these methods are correctly implemented and functioning, the "No Fields found" issue should be resolved [1][2][3].
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azaidiuk
lucaseduoli
Bug Description
SubFlow component does not load flows
Reproduction
Expected behavior
List of existing flows to select from
Who can help?
@ogabrielluiz
Operating System
Mac OSX
Langflow Version
V1.11
Python Version
3.10