'PGVector' has no attribute 'acreate'

[bfigueir]

Hi all,

im running a simple FastAPI endpoint with the code:

from langchain_postgres import PGVector
from langchain_postgres.vectorstores import PGVector

connection = "postgresql+psycopg://*****:******@localhost:5432/db"

@router.get(
    "/test_pgvector_2",
)
async def test_pgvector_2():
    vector_store = await PGVector.acreate(
        embeddings=get_embeddings(),
        collection_name="vector_store",
        connection=connection,
        use_jsonb=True,
    )

    retriever = vector_store.as_retriever()
    docs = retriever.invoke("prompt engineering")
    return docs

Based on the documentation that states "Initialize the PGVector store. For an async version, use PGVector.acreate() instead." it should work, but I'm getting the error AttributeError: type object 'PGVector' has no attribute 'acreate'

This is what I have on the pyproject.toml for the dependencies:

[tool.poetry.dependencies]
python = "^3.12.3"
uvicorn = "^0.34.0"
fastapi = "^0.115.6"
dapr = "^1.14.0"
python-dotenv = "^1.0.1"
structlog = "^24.4.0"
pydantic = "^2.0.0"
pydantic-settings = "^2.7.1"
sqlalchemy = "^2.0.36"
psycopg2-binary = "^2.9.10"
alembic = "^1.14.0"
langchain = "^0.3.7"
langchain-openai = "^0.2.8"
langchain-core = "^0.3.19"
onnxruntime = "1.19.2"
langchain-chroma = "^0.1.4"
bs4 = "^0.0.2"
langchain-community = "^0.3.7"
langgraph = "^0.2.50"
langchain-groq = "^0.2.1"
numexpr = "^2.10.1"
pyowm = "^3.3.0"
python-multipart = "^0.0.17"
setuptools = "^75.8.0"
cachetools = "^5.5.0"
async-lru = "^2.0.4"
langchain-postgres = "^0.0.12"

Any thoughts? thanks