Add Cypher query language generating chain #4881
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tomasonjo
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tomasonjo
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hwchase17
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May 19, 2023
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Thanks for the review @hwchase17 . I've added instructions how to setup Neo4j in the notebook. |
baskaryan
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Jul 24, 2023
**Description**: Serves as an introduction to LangChain's support for [ArangoDB](https://github.com/arangodb/arangodb), similar to #7165 and #4881 **Issue**: No issue has been created for this feature **Dependencies**: `python-arango` has been added as an optional dependency via the `CONTRIBUTING.md` guidelines **Twitter handle**: [at]arangodb - Integration test has been added - Notebook has been added: [graph_arangodb_qa.ipynb](https://github.com/amahanna/langchain/blob/master/docs/extras/modules/chains/additional/graph_arangodb_qa.ipynb) [](https://colab.research.google.com/github/amahanna/langchain/blob/master/docs/extras/modules/chains/additional/graph_arangodb_qa.ipynb) ``` docker run -p 8529:8529 -e ARANGO_ROOT_PASSWORD= arangodb/arangodb ``` ``` pip install git+https://github.com/amahanna/langchain.git ``` ```python from arango import ArangoClient from langchain.chat_models import ChatOpenAI from langchain.graphs import ArangoGraph from langchain.chains import ArangoGraphQAChain db = ArangoClient(hosts="localhost:8529").db(name="_system", username="root", password="", verify=True) graph = ArangoGraph(db) chain = ArangoGraphQAChain.from_llm(ChatOpenAI(temperature=0), graph=graph) chain.run("Is Ned Stark alive?") ``` --------- Co-authored-by: Bagatur <baskaryan@gmail.com>
](https://colab.research.google.com/github/amahanna/langchain/blob/master/docs/extras/modules/chains/additional/graph_arangodb_qa.ipynb){kind=link}
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Add Neo4j support and Cypher generating Chain
The idea is to add support for querying Graph Databases that use Cypher query language like Neo4j.
Since queries need to be constructed at query time, we use a similar approach as the text2sql, but instead of generating SQL statements, we generate Cypher statements based on the provided graph schema, which makes this a generic solution.
Todo
Fixes # (issue)
#4625