Substring support for similarity_search_with_score (#10746)

**Description:** Possible to filter with substrings in similarity_search_with_score, for example: filter={'user_id': {'substring': 'user'}} --------- Co-authored-by: Harrison Chase <[email protected]>
langchain-ai · Sep 20, 2023 · 900dbd1 · 900dbd1
1 parent 740eafe
commit 900dbd1
Showing 1 changed file with 7 additions and 0 deletions.
diff --git a/libs/langchain/langchain/vectorstores/pgembedding.py b/libs/langchain/langchain/vectorstores/pgembedding.py
@@ -360,6 +360,13 @@ def similarity_search_with_score_by_vector(
                             value_case_insensitive[IN]
                         )
                         filter_clauses.append(filter_by_metadata)
+                    elif isinstance(value, dict) and "substring" in map(
+                        str.lower, value
+                    ):
+                        filter_by_metadata = EmbeddingStore.cmetadata[key].astext.ilike(
+                            f"%{value['substring']}%"
+                        )
+                        filter_clauses.append(filter_by_metadata)
                     else:
                         filter_by_metadata = EmbeddingStore.cmetadata[
                             key