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Make project compatible with SQLAlchemy 1.3.* (#3862)

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Related to [this
issue.](https://github.com/hwchase17/langchain/issues/3655#issuecomment-1529415363)

The `Mapped` SQLAlchemy class is introduced in SQLAlchemy 1.4 but the
migration from 1.3 to 1.4 is quite challenging so, IMO, it's better to
keep backwards compatibility and not change the SQLAlchemy requirements
just because of type annotations.
This commit is contained in:
Hristo Stoychev 2023-05-02 06:58:22 +03:00 committed by GitHub
parent 8bbdde8f9e
commit 109927cdb2
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3 changed files with 5 additions and 5 deletions
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4
langchain/vectorstores/analyticdb.py
View File

@ -8,7 +8,7 @@ from typing import Any, Dict, Iterable, List, Optional, Tuple
import sqlalchemy
from sqlalchemy import REAL, Index
from sqlalchemy.dialects.postgresql import ARRAY, JSON, UUID
from sqlalchemy.orm import Mapped, Session, declarative_base, relationship
from sqlalchemy.orm import Session, declarative_base, relationship
from sqlalchemy.sql.expression import func
from langchain.docstore.document import Document
@ -70,7 +70,7 @@ class CollectionStore(BaseModel):
class EmbeddingStore(BaseModel):
__tablename__ = "langchain_pg_embedding"
collection_id: Mapped[UUID] = sqlalchemy.Column(
collection_id = sqlalchemy.Column(
UUID(as_uuid=True),
sqlalchemy.ForeignKey(
f"{CollectionStore.__tablename__}.uuid",

4
langchain/vectorstores/pgvector.py
View File

@ -9,7 +9,7 @@ from typing import Any, Dict, Iterable, List, Optional, Tuple, Type
import sqlalchemy
from pgvector.sqlalchemy import Vector
from sqlalchemy.dialects.postgresql import JSON, UUID
from sqlalchemy.orm import Mapped, Session, declarative_base, relationship
from sqlalchemy.orm import Session, declarative_base, relationship
from langchain.docstore.document import Document
from langchain.embeddings.base import Embeddings
@ -70,7 +70,7 @@ class CollectionStore(BaseModel):
class EmbeddingStore(BaseModel):
__tablename__ = "langchain_pg_embedding"
collection_id: Mapped[UUID] = sqlalchemy.Column(
collection_id = sqlalchemy.Column(
UUID(as_uuid=True),
sqlalchemy.ForeignKey(
f"{CollectionStore.__tablename__}.uuid",

2
pyproject.toml
View File

@ -13,7 +13,7 @@ langchain-server = "langchain.server:main"
[tool.poetry.dependencies]
python = ">=3.8.1,<4.0"
pydantic = "^1"
SQLAlchemy = ">1.4,<3"
SQLAlchemy = ">=1.3,<3"
requests = "^2"
PyYAML = ">=5.4.1"
numpy = "^1"