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chore: Add deprecation warning for PGVector #169

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Merged
merged 5 commits into from
Apr 4, 2025
Merged

chore: Add deprecation warning for PGVector #169

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274242a
chore: Add deprecation warning for PGVector
dishaprakash Mar 19, 2025
ab18197
Linter fix
dishaprakash Mar 19, 2025
4934419
change warning stmt
dishaprakash Mar 19, 2025
24779dd
Review changes
dishaprakash Mar 25, 2025
9425a7b
Merge branch 'pg-vectorstore' into deprecation-warning
averikitsch Apr 4, 2025
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10 changes: 10 additions & 0 deletions langchain_postgres/vectorstores.py
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Original file line number Diff line number Diff line change
Expand Up @@ -19,6 +19,7 @@
Type,
Union,
)
import warnings
from typing import (
cast as typing_cast,
)
Expand Down Expand Up @@ -48,6 +49,8 @@

from langchain_postgres._utils import maximal_marginal_relevance

warnings.simplefilter("once", PendingDeprecationWarning)


class DistanceStrategy(str, enum.Enum):
"""Enumerator of the Distance strategies."""
Expand Down Expand Up @@ -428,6 +431,13 @@ def __init__(
self._async_engine: Optional[AsyncEngine] = None
self._async_init = False

warnings.warn(
"PGVector is being deprecated and will be removed in the future. "
"Please migrate to PGVectorStore. "
"Refer to the migration guide at [https://github.com/langchain-ai/langchain-postgres/blob/main/examples/migrate_pgvector_to_pgvectorstore.md] for details.",
PendingDeprecationWarning,
)

if isinstance(connection, str):
if async_mode:
self._async_engine = create_async_engine(
Expand Down