#2595 ChromaDB: Add ability to adjust metadata for indexes upon creating co… (#2597)

Referencing #2595
Added optional default parameter to adjust index metadata upon
collection creation per chroma code

ce0bc89777/chromadb/api/local.py (L74)

Allowing for user to have the ability to adjust distance calculation
functions.

langchain/vectorstores/chroma.py

@@ -59,6 +59,7 @@ class Chroma(VectorStore):
         embedding_function: Optional[Embeddings] = None,
         persist_directory: Optional[str] = None,
         client_settings: Optional[chromadb.config.Settings] = None,
+        collection_metadata: Optional[Dict] = None,
     ) -> None:
         """Initialize with Chroma client."""
         try:
@@ -86,6 +87,7 @@ class Chroma(VectorStore):
             embedding_function=self._embedding_function.embed_documents
             if self._embedding_function is not None
             else None,
+            metadata=collection_metadata,
         )
 
     def add_texts(