RavenDB无法理解Where-＆gt; Any-＆gt; Any

Question

我有一个帐户类型：

Account:
    String Name
    List<Group> Groups

组类型为

Group:
    List<String> Addresses
    List<Schedule> Schedules

并且计划类型是

Schedule:
    String Type
    String Time

我想查找所有与时间匹配的时间表，并将帐户名称和所有地址一起发送，以及时间表类型：

SendMail(AccountName, Type, Addresses)

所以我为RavenDB编写了这个查询，其中所有这些信息都存储为单个文档：

    var accounts = session.Query<Account>().Where(
        a => a.Groups.Any(
            g=> g.Schedules.Any(s => s.Time== timeString)
        )
    );

然后处理它：

                foreach (Account account in accounts) {
                    List<String> addressesToNotify = new List<String>();
                    List<String> addressesToAdvertise = new List<String>();
                    foreach (Group group in account.Groups) {
                        foreach (Schedule schedule in group .Schedules) {
                            if (schedule .Time== timeString) {
                                if (schedule.Type== "Notify") {
                                    addressesToNotify.AddRange(group.Addresses);
                                } else {
                                    addressesToAdvertise .AddRange(group.Addresses);
                                }
                            }
                        }
                    }

                    SendMail(account.Name, "Notify", addressesToNotify);
                    SendMail(account.Name, "Advertise", addressesToAdvertise);

                }

但是我有两个问题。

1）RavenDB无法理解where里面的任何内容

Could not understand expression: a => a.Groups.Any(
            g=> g.Schedules.Any(s => s.Time== timeString)
        )

2）我觉得那些嵌套循环非常低效，而某些Select会使它更快更可读

如何修复查询并使处理代码更具可读性？