Error in Langchain-neo4j support for Apache Age

[stephenljk]

Checked other resources

• I added a very descriptive title to this issue.
• I searched the LangChain documentation with the integrated search.
• I used the GitHub search to find a similar question and didn't find it.
• I am sure that this is a bug in LangChain rather than my code.
• The bug is not resolved by updating to the latest stable version of LangChain (or the specific integration package).

Example Code

The following code

chain = GraphCypherQAChain.from_llm(
    ChatOpenAI(temperature=0), graph=graph, verbose=True, allow_dangerous_requests=True
)

from the link throws an error:

An error occurred: 1 validation error for GraphCypherQAChain
graph
Input should be an instance of GraphStore [type=is_instance_of, input_value=<langchain_community.grap...t at 0x000001D644EA71A0>, input_type=AGEGraph]
For further information visit https://errors.pydantic.dev/2.10/v/is_instance_of

The latest version of langchain-neo4j (0.2.0 and 0.1.1) don't support Age somehow. Have to revert to 0.1.0

Error Message and Stack Trace (if applicable)

No response

Description

I am trying to use langchain-neo4j to query Age as per shown in the documentation

System Info

System Information

OS: Linux
OS Version: #202405300957173698068022.04~44ea8a9 SMP PREEMPT_DYNAMIC Thu J
Python Version: 3.12.8 | packaged by conda-forge | (main, Dec 5 2024, 14:24:40) [GCC 13.3.0]

Package Information

langchain_core: 0.3.30
langchain: 0.3.14
langchain_community: 0.3.14
langsmith: 0.2.11
langchain_neo4j: 0.1.0
langchain_openai: 0.3.0
langchain_text_splitters: 0.3.5
langgraph_sdk: 0.1.51

Optional packages not installed

langserve

Other Dependencies

aiohttp: 3.11.11
async-timeout: 4.0.3
dataclasses-json: 0.6.7
httpx: 0.28.1
httpx-sse: 0.4.0
jsonpatch: 1.33
langsmith-pyo3: Installed. No version info available.
neo4j: 5.27.0
numpy: 1.26.4
openai: 1.59.8
orjson: 3.10.14
packaging: 24.2
pydantic: 2.10.5
pydantic-settings: 2.7.1
PyYAML: 6.0.2
requests: 2.32.3
requests-toolbelt: 1.0.0
SQLAlchemy: 2.0.37
tenacity: 9.0.0
tiktoken: 0.8.0
typing-extensions: 4.12.2
zstandard: 0.23.0