add neo4j query constructor for self query

[moyid]

• PR title - community: add neo4j query constructor for self query

• PR message

  • Description: adding a Neo4jTranslator so that the Neo4j vector database can use SelfQueryRetriever
  • Issue: this issue had been raised before in Self query retriever with Vector Store type <class 'langchain_community.vectorstores.neo4j_vector.Neo4jVector'> not supported #19748
  • Dependencies: none.
  • Twitter handle: @moyi_dang
  • p.s. I have not added the query constructor in BUILTIN_TRANSLATORS in this PR, I want to make changes to only one package at a time.

• Add tests and docs: If you're adding a new integration, please include

  1. a test for the integration, preferably unit tests that do not rely on network access,
  2. an example notebook showing its use. It lives in docs/docs/integrations directory.

• Lint and test: Run make format, make lint and make test from the root of the package(s) you've modified. See contribution guidelines for more: https://python.langchain.com/docs/contributing/

Additional guidelines:

• Make sure optional dependencies are imported within a function.
• Please do not add dependencies to pyproject.toml files (even optional ones) unless they are required for unit tests.
• Most PRs should not touch more than one package.
• Changes should be backwards compatible.
• If you are adding something to community, do not re-import it in langchain.

If no one reviews your PR within a few days, please @-mention one of baskaryan, efriis, eyurtsev, ccurme, vbarda, hwchase17.

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Name	Status	Preview	Comments	Updated (UTC)
langchain	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Aug 30, 2024 2:54pm

[moyid]

Hi @ccurme,

I’ve made a small contribution to the LangChain community and would appreciate it if you could help approve the workflows.

Thank you for your support!

[baskaryan]

cc @tomasonjo @jexp

[tomasonjo]

Thanks for your PR... can you please fix notebook as it has import error and can you leave all the outputs, so that people know what to expect.

I'll try it out later!

[moyid]

@tomasonjo thanks for taking an initial look! I have fixed the notebook, it's working now!

[tomasonjo]

Thanks!

[tomasonjo]

Btw... i think file 'libs/community/file::memory:?cache=shared' should be deleted