choosing index does not work with facetes

src/modules/faceted-search/faceted-search.xqm

@@ -292,7 +292,7 @@ declare function local:get-hits($model as map(*), $target as xs:string) as node(
     let $xqueries :=  for $query-root in $model("config")//module[@key="faceted-search"]/param[@key="query-root"]//xpath
         return
             if($query) then
-                "collection($target)" || $query-root || $fxquery || "[ft:query-field($index, $query)]"
+                "collection($target)" || $query-root || $fxquery || "[ft:query(., $query)]"
             else
                 "collection($target)" || $query-root || $fxquery