add indices

lib/dbwrap.js

@@ -154,6 +154,7 @@ function wrap(db, dir, dbsMap) {
     var idnameCased = (camelCase(dir.idname || 'id'));
 
     dir.indices.forEach(normalizeColumn);
+    DB._indices = dir.indices;
 
     db = PromiseA.promisifyAll(db);