fix sparql construct (need a default graph)

ng-oxigraph/src/oxigraph/sparql/dataset.rs

@@ -99,7 +99,7 @@ impl DatasetView {
                     .parse_graph_name(&graph_name_string, Some(*iri_id))
             }
             _ => Err(CorruptionError::msg(
-                "Invalid graph_name (not a NamedNode) in parse_graph_name",
+                format!("Invalid graph_name (not a NamedNode) in parse_graph_name {:?}", graph_name),
             )
             .into()),
         }

ng-verifier/src/orm.rs

@@ -48,7 +48,7 @@ impl Verifier {
         let parsed =
             Query::parse(&query, nuri_str).map_err(|e| NgError::OxiGraphError(e.to_string()))?;
         let results = oxistore
-            .query(parsed, None)
+            .query(parsed, nuri)
             .map_err(|e| NgError::OxiGraphError(e.to_string()))?;
         match results {
             QueryResults::Graph(triples) => {