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synced 2026-07-25 04:26:41 -04:00
Jeff Huber
f93c011456
The basic vector store example started breaking because `Document` required `not None` for metadata, but Chroma stores metadata as `None` if none is provided. This creates a fallback which fixes the basic tutorial https://langchain.readthedocs.io/en/latest/modules/indexes/examples/vectorstores.html Here is the error that was generated ``` Running Chroma using direct local API. Using DuckDB in-memory for database. Data will be transient. Traceback (most recent call last): File "/Users/jeff/src/temp/langchainchroma/test.py", line 17, in <module> docs = docsearch.similarity_search(query) File "/Users/jeff/src/langchain/langchain/vectorstores/chroma.py", line 133, in similarity_search docs_and_scores = self.similarity_search_with_score(query, k) File "/Users/jeff/src/langchain/langchain/vectorstores/chroma.py", line 182, in similarity_search_with_score return _results_to_docs_and_scores(results) File "/Users/jeff/src/langchain/langchain/vectorstores/chroma.py", line 24, in _results_to_docs_and_scores return [ File "/Users/jeff/src/langchain/langchain/vectorstores/chroma.py", line 27, in <listcomp> (Document(page_content=result[0], metadata=result[1]), result[2]) File "pydantic/main.py", line 331, in pydantic.main.BaseModel.__init__ pydantic.error_wrappers.ValidationError: 1 validation error for Document metadata none is not an allowed value (type=type_error.none.not_allowed) Exiting: Cleaning up .chroma directory ```