RavenDB使用集合偏移量中的值查询日期时间

Question

我试图在Datetime上查询RavenDB,该日期时间被集合中的条目所抵消.如下所示,我有一个AppointmentReminder对象,其中包含许多AppointmentReminderJobs.我想查询AppointmentReminderJob将要运行的AppointmentReminders.

我的模型如下:

public class AppointmentReminder
{
    public int Id { get; set; }
    public string FirstName { get; set; }
    public string LastName { get; set; }
    public string Email { get; set; }
    public string Phone { get; set; }
    public DateTime AppointmentDateTime { get; set; }
    public ReminderStatus ReminderStatus { get; set; }
    public List<AppointmentReminderJob> AppointmentReminderJobs { get; set; }
 }

public class AppointmentReminderJob
{
    public JobStatus JobStatus { get; set; }
    public int DaysPrior { get; set; }
}

我的控制器并尝试检索具有当前作业的AppointmentReminders列表(我知道这个Where子句不完整,但我试图简化它而没有运气):

public ActionResult GetJobsQueuedListCurrent()
    {
        var jobsqueuedlist = RavenSession.Query<AppointmentReminder>()
            .Where(appointmentreminder => appointmentreminder.AppointmentReminderJobs.Any(x => appointmentreminder.AppointmentDateTime < DateTime.Now.AddDays(x.DaysPrior)))
            .OrderBy(appointmentreminder => appointmentreminder.AppointmentDateTime)
            .Take(20)
            .ToList();

        return View("List", jobsqueuedlist);

    }

调用上述内容会产生以下响应:

variable 'x' of type 'ProjectName.Models.AppointmentReminderJob' referenced from scope '', but it is not defined

我试图建立一个像这样的索引:

public class JobsQueuedListCurrent : AbstractIndexCreationTask<AppointmentReminder, JobsQueuedListCurrent.IndexResult>
{
    public class IndexResult
    {
        public int Id { get; set; }
        public DateTime JobDateTime { get; set; }
    }

    public JobsQueuedListCurrent()
    {


        Map = appointmentreminders => from appointmentreminder in appointmentreminders
                                      from job in appointmentreminder.AppointmentReminderJobs
                                      select new 
                                      { 
                                          Id = appointmentreminder.Id, 
                                          JobDateTime = appointmentreminder.AppointmentDateTime.AddDays(job.DaysPrior)
                                      };
        Store(x => x.Id, FieldStorage.Yes);
        Store(x => x.JobDateTime, FieldStorage.Yes);
    }
}

现在,我正在使用以下方法查询并获得预期结果:

var jobsqueuedlist = RavenSession.Query<JobsQueuedListCurrent.IndexResult, JobsQueuedListCurrent>()
            .Where(x=>x.JobDateTime >= DateTime.Now)
            .As<AppointmentReminder>()
            .Take(20)
            .ToList();

        return View("List", jobsqueuedlist);

关于这个的最后一个问题是,我的map/index肯定会导致同一文档id(appointmentreminder)的多个条目,但我的结果列表只包含1个文档实例.我很满意它的工作方式,我只是不确定我是应该在我的代码中执行reduce还是做其他事情,或者让Raven像看起来那样处理它？

Answer 1

您不能创建这样的查询。这将需要 RavenDB 在查询期间执行计算，这是不允许的。RavenDB 只允许查询索引中的数据。

您可以做什么在索引中设置计算，然后查询该.