CodeGo.net>如何创建一个子查询投影,给它一个别名,并使用Criteria API在NHibernate中按别名排序

forum.hibernate.org/viewtopic.php?p=2378849

其中一位张贴者给出了以下答案：

You need to create a Projection (…), give it an alias and you can then sort by the alias.
No time to post the details but I’m pretty sure that would work.

有人可以使用Criteria API提供一个简单的示例,该查询使用Projection进行子查询,然后将该子查询用作别名,然后按该别名进行排序吗？

干杯！

解决方法:

您可以根据需要添加更多的DetachedCriteria.

这是我的样本：

DetachedCriteria sum = DetachedCriteria.For(typeof(MasterAsset), "asset2")
                    .SetProjection(Projections.Sum("PhysicCondition"));

DetachedCriteria count = DetachedCriteria.For(typeof(MasterAsset), "asset3")
                    .SetProjection(Projections.Count("PhysicCondition"));

Session.CreateCriteria(typeof(MasterAsset), "asset1")
                    .SetProjection(Projections.ProjectionList()
                    .Add(Projections.Property("IDMasterAsset"), "IDAsset"))
                    .Add(Subqueries.PropertyLt("PhysicCondition", sum))
                    .Add(Subqueries.PropertyLe("PhysicCondition", count))
                    .AddOrder(Order.Asc("IDAsset"))
                    .List();

希望能有所帮助.

标签：criteria-api,nhibernate,c,nhibernate-projections
来源： https://codeday.me/bug/20191105/1995865.html