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langchain: fixed weaviate (v4) vectorstore import for self-query retriever (#28675)

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Co-authored-by: Xin Heng <xin.heng@gmail.com>
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xintoteai 2024-12-11 15:53:41 -08:00 committed by GitHub
parent ee640d6bd3
commit 45f9c9ae88
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1 changed files with 11 additions and 0 deletions
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11
libs/langchain/langchain/retrievers/self_query/base.py
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@ -170,6 +170,7 @@ def _get_builtin_translator(vectorstore: VectorStore) -> Visitor:
return Neo4jTranslator()
try:
# Trying langchain_chroma import if exists
from langchain_chroma import Chroma
except ImportError:
pass
@ -204,6 +205,16 @@ def _get_builtin_translator(vectorstore: VectorStore) -> Visitor:
if isinstance(vectorstore, HanaDB):
return HanaTranslator()
try:
# Trying langchain_weaviate (weaviate v4) import if exists
from langchain_weaviate.vectorstores import WeaviateVectorStore
except ImportError:
pass
else:
if isinstance(vectorstore, WeaviateVectorStore):
return WeaviateTranslator()
raise ValueError(
f"Self query retriever with Vector Store type {vectorstore.__class__}"
f" not supported."