我正在尝试在日期时查询RavenDB,该日期正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即将运行的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AppointmentReminder列表(我知道这个Where子句没有完成,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
我正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,我正在使用以下方式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,或者只是让Raven像看起来那样处理它?
答案 0 :(得分:4)
您无法创建此类查询。这将要求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。
可以在索引中设置计算,然后在上查询。