如何在查询中添加groupby而不是nhibernate？

Question

我怎样才能将groupby Id添加到这个nhibernate代码中,因为我是新手,并且有许多方法,但对我来说都没有用.

.Select(Projections.Sum(() => ServiceOrderItem.WorkTime), 
    Projections.ProjectionList().Add(Projections.Property(
        () => ServiceOrder.Id).WithAlias(() => TechnicianWorkTime.Id))
    )

ProjectionList中会有更多...

Answer 1

你可以使用SelectList它:

query.SelectList(list => list
  .SelectGroup(() => ServiceOrder.Id)
  .SelectSum(() => ServiceOrderItem.WorkTime));