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

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merged 1 commit into from
Dec 11, 2024
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langchain: fixed weaviate (v4) vectorstore import for self-query retriever #28675

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11 changes: 11 additions & 0 deletions libs/langchain/langchain/retrievers/self_query/base.py
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Original file line number Diff line number Diff line change
Expand Up @@ -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
Expand Down Expand Up @@ -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."
Expand Down
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