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feat: add dropdown select for region on the langchain hub component #10514

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feat: add dropdown select for region on the langchain hub component #10514

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6f538e9
feat: add dropdown select for region on the langchain hub component
0xNekr Nov 6, 2025
e67ea4a
[autofix.ci] apply automated fixes
autofix-ci[bot] Nov 6, 2025
2452cb0
fix: indent error
0xNekr Nov 6, 2025
096f1e8
[autofix.ci] apply automated fixes
autofix-ci[bot] Nov 6, 2025
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2 changes: 1 addition & 1 deletion src/lfx/src/lfx/_assets/component_index.json
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15 changes: 13 additions & 2 deletions src/lfx/src/lfx/components/langchain_utilities/langchain_hub.py
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Original file line number Diff line number Diff line change
Expand Up @@ -3,7 +3,7 @@
from langchain_core.prompts import HumanMessagePromptTemplate

from lfx.custom.custom_component.component import Component
from lfx.inputs.inputs import DefaultPromptField, SecretStrInput, StrInput
from lfx.inputs.inputs import DefaultPromptField, DropdownInput, SecretStrInput, StrInput
from lfx.io import Output
from lfx.schema.message import Message

Expand All @@ -23,6 +23,14 @@ class LangChainHubPromptComponent(Component):
info="The LangChain API Key to use.",
required=True,
),
DropdownInput(
name="region",
display_name="Region",
info="Select the LangChain Hub region (US or EU)",
options=["US", "EU"],
value="US",
required=True,
),
StrInput(
name="langchain_hub_prompt",
display_name="LangChain Hub Prompt",
Expand Down Expand Up @@ -122,5 +130,8 @@ def _fetch_langchain_hub_template(self):

raise ValueError(msg)

# Determine the API URL based on region
api_url = "https://api.hub.langchain.com" if self.region == "US" else "https://eu.api.hub.langchain.com"

# Pull the prompt from LangChain Hub
return langchain.hub.pull(self.langchain_hub_prompt, api_key=self.langchain_api_key)
return langchain.hub.pull(self.langchain_hub_prompt, api_key=self.langchain_api_key, api_url=api_url)
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