fix issue: cannot use document_variable_name to override context in create_stuff_documents_chain

[jiru1997]

…he prompt in the create_stuff_documents_chain

Thank you for contributing to LangChain!

• PR title: "langchain:add document_variable_name in the function _validate_prompt in create_stuff_documents_chain"

• PR message:

  • Description: add document_variable_name in the function _validate_prompt in create_stuff_documents_chain
  • Issue: according to the description of create_stuff_documents_chain function, the parameter document_variable_name can be used to override the "context" in the prompt, but in the function, _validate_prompt it still use DOCUMENTS_KEY to check if it is a valid prompt, the value of DOCUMENTS_KEY is always "context", so even through the user use document_variable_name to override it, the code still tries to check if "context" is in the prompt, and finally it reports error. so I use document_variable_name to replace DOCUMENTS_KEY, the default value of document_variable_name is "context" which is same as DOCUMENTS_KEY, but it can be override by users.
  • Dependencies: none
  • Twitter handle: https://x.com/xjr199703

• Add tests and docs: none

• 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.

[vercel]

The latest updates on your projects. Learn more about Vercel for Git ↗︎

1 Skipped Deployment

Name	Status	Preview	Comments	Updated (UTC)
langchain	⬜️ Ignored (Inspect)	Visit Preview		Aug 19, 2024 1:19pm