Added missing lucene special char to remove_lucene_chars (langchain-a…

…i#36)

* Updated CHANGELOG

* Fixed small GraphStore typo

* Added missing lucene special char to remove_lucene_chars

* Updated CHANGELOG

* Updated CHANGELOG

CHANGELOG.md

@@ -9,12 +9,14 @@
 ### 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.
+- 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.
+- 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
 

libs/neo4j/langchain_neo4j/graphs/graph_store.py

@@ -23,7 +23,7 @@ def query(self, query: str, params: dict = {}) -> List[Dict[str, Any]]:
 
     def refresh_schema(self) -> None:
         """Refresh the graph schema information."""
-        pass
+        ...
 
     def add_graph_documents(
         self, graph_documents: List[GraphDocument], include_source: bool = False

libs/neo4j/langchain_neo4j/vectorstores/neo4j_vector.py

@@ -160,6 +160,7 @@ def remove_lucene_chars(text: str) -> str:
         "?",
         ":",
         "\\",
+        "/",
     ]
     for char in special_chars:
         if char in text:

libs/neo4j/tests/unit_tests/vectorstores/test_neo4j.py

@@ -179,6 +179,10 @@ def test_escaping_lucene() -> None:
         remove_lucene_chars("It is the end of the world. Take shelter~")
         == "It is the end of the world. Take shelter"
     )
+    assert (
+        remove_lucene_chars("It is the end of the world. Take shelter/")
+        == "It is the end of the world. Take shelter"
+    )
 
 
 def test_converting_to_yaml() -> None: