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CHANGELOG.md

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Changelog

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Added

  • Optional parameter to specify embedding dimension in Neo4jVector, avoiding the need to query the embedding model.

Changed

  • Made the source parameter of GraphDocument optional and updated related methods to support this.
  • Suppressed AggregationSkippedNull warnings raised by the Neo4j driver in the Neo4jGraph class when fetching the enhanced_schema.
  • Modified the Neo4jGraph class's enhanced schema Cypher query to utilize the apoc.meta.graph procedure instead of apoc.meta.graphSample.
  • Updated GraphStore to be a Protocol, enabling compatibility with GraphCypherQAChain without requiring inheritance.

Fixed

  • Resolved syntax errors in GraphCypherQAChain by ensuring node labels with spaces are correctly quoted in Cypher queries.
  • Added missing Lucene special character '/' to the list of characters escaped in remove_lucene_chars.

0.2.0

Added

  • Enhanced Neo4j driver connection management with more robust error handling.
  • Simplified connection state checking in Neo4jGraph.
  • Introduced effective_search_ratio parameter in Neo4jVector to enhance query accuracy by adjusting the candidate pool size during similarity searches.

Fixed

  • Removed deprecated LLMChain from GraphCypherQAChain to resolve instantiation issues with the use_function_response parameter.
  • Removed unnecessary # type: ignore comments, improving type safety and code clarity.

0.1.1

Changed

  • Removed dependency on LangChain Community package by integrating necessary components directly into the LangChain Neo4j codebase.

Updated

  • Fixed bugs in the Neo4jVector and GraphCypherQAChain classes preventing these classes from working with versions < 5.23 of Neo4j.

0.1.0

Added

  • Migrated all Neo4j-related code, including tests and integration tests, from the LangChain Community package to this package.