Better error messages

libs/community/langchain_community/vectorstores/neo4j_vector.py

@@ -1044,12 +1044,17 @@ class Neo4jVector(VectorStore):
         results = self.query(read_query, params=parameters)
 
         if any(result["text"] is None for result in results):
-            raise ValueError(
-                "If you are using `text_node_property`, make sure it is not null "
-                "for any of the indexed nodes. If using `from_existing_graph` or "
-                "`retrieval_query`, ensure it doesn't return None for "
-                "the `text` column."
-            )
+            if not self.retrieval_query:
+                raise ValueError(
+                    f"Make sure that none of the `{self.text_node_property}` "
+                    f"properties on nodes with label `{self.node_label}` "
+                    "are missing or empty"
+                )
+            else:
+                raise ValueError(
+                    "Inspect the `retrieval_query` and ensure it doesn't "
+                    "return None for the `text` column"
+                )
 
         docs = [
             (