Harmonize return properties in Vector and Hybrid retrievers (neo4j#193)

* Harmonize retriever results

* Undo changes to external retriever

* Update CHANGELOG

CHANGELOG.md

@@ -6,6 +6,9 @@
 - Made `relations` and `potential_schema` optional in `SchemaBuilder`.
 - Added a check to prevent the use of deprecated Cypher syntax for Neo4j versions 5.23.0 and above.
 
+### Changed
+- Vector and Hybrid retrievers used with `return_properties` now also return the node labels (`nodeLabels`) and the node's element ID (`id`).
+
 ## 1.1.0
 
 ### Added

src/neo4j_graphrag/neo4j_queries.py

@@ -253,5 +253,5 @@ def get_query_tail(
         return retrieval_query
     if return_properties:
         return_properties_cypher = ", ".join([f".{prop}" for prop in return_properties])
-        return f"RETURN node {{{return_properties_cypher}}} as node, score"
+        return f"RETURN node {{{return_properties_cypher}}} AS node, labels(node) AS nodeLabels, elementId(node) AS id, score"
     return fallback_return if fallback_return else ""

tests/e2e/qdrant_e2e/test_qdrant_e2e.py

@@ -67,7 +67,6 @@ def test_qdrant_neo4j_vector_input(driver: Driver, qdrant_client: QdrantClient)
     assert isinstance(results, RetrieverResult)
     assert len(results.items) == top_k
     assert isinstance(results.items[0], RetrieverResultItem)
-    print("Results are: ", results.items)
     pattern = (
         r"<Record node=<Node element_id='.+' "
         r"labels=frozenset\({'Question'}\) properties={'question': 'In 1953 Watson \& "

tests/unit/retrievers/external/test_weaviate.py

@@ -225,7 +225,7 @@ def test_match_query_with_return_properties() -> None:
         "WITH match_param[0] AS match_id_value, match_param[1] AS score "
         "MATCH (node) "
         "WHERE node[$id_property] = match_id_value "
-        "RETURN node {.name, .age} as node, score"
+        "RETURN node {.name, .age} AS node, labels(node) AS nodeLabels, elementId(node) AS id, score"
     )
     assert match_query.strip() == expected.strip()
 

tests/unit/test_neo4j_queries.py

@@ -56,7 +56,7 @@ def test_vector_search_with_properties() -> None:
     expected = (
         "CALL db.index.vector.queryNodes($vector_index_name, $top_k, $query_vector) "
         "YIELD node, score "
-        "RETURN node {.name, .age} as node, score"
+        "RETURN node {.name, .age} AS node, labels(node) AS nodeLabels, elementId(node) AS id, score"
     )
     result, _ = get_search_query(SearchType.VECTOR, return_properties=properties)
     assert result.strip() == expected.strip()
@@ -159,7 +159,7 @@ def test_hybrid_search_with_properties() -> None:
         "RETURN n.node AS node, (n.score / ft_index_max_score) AS score "
         "} "
         "WITH node, max(score) AS score ORDER BY score DESC LIMIT $top_k "
-        "RETURN node {.name, .age} as node, score"
+        "RETURN node {.name, .age} AS node, labels(node) AS nodeLabels, elementId(node) AS id, score"
     )
     result, _ = get_search_query(SearchType.HYBRID, return_properties=properties)
     assert result.strip() == expected.strip()
@@ -174,7 +174,7 @@ def test_get_query_tail_with_retrieval_query() -> None:
 
 def test_get_query_tail_with_properties() -> None:
     properties = ["name", "age"]
-    expected = "RETURN node {.name, .age} as node, score"
+    expected = "RETURN node {.name, .age} AS node, labels(node) AS nodeLabels, elementId(node) AS id, score"
     result = get_query_tail(return_properties=properties)
     assert result.strip() == expected.strip()
 
@@ -204,7 +204,7 @@ def test_get_query_tail_ordering_no_retrieval_query() -> None:
     properties = ["name", "age"]
     fallback = "HELLO"
 
-    expected = "RETURN node {.name, .age} as node, score"
+    expected = "RETURN node {.name, .age} AS node, labels(node) AS nodeLabels, elementId(node) AS id, score"
     result = get_query_tail(
         return_properties=properties,
         fallback_return=fallback,