var query = EntityQuery.from("OrderDetails")
        .where("OrderID","==",11069)
        .expand("Order.Customer","Order.Employee");
    manager.executeQuery(query).then(querySucceeded).fail(queryFailed);
 
    function querySucceeded(data){
         var customer = data.results[0].Order().Customer();
         var employee = data.results[0].Order().Employee(); // returns null!!!!!
    }

如果我更改扩展参数列表中的顺序,而不是将customer设置为null：

var query = EntityQuery.from("OrderDetails")
        .where("OrderID",11069)
        .expand("Order.Employee","Order.Customer");
    manager.executeQuery(query).then(querySucceeded).fail(queryFailed);
 
    function querySucceeded(data){
         var customer = data.results[0].Order().Customer(); // returns null!!!!!
         var employee = data.results[0].Order().Employee();         }

这有什么问题？