asp.net-mvc - NHibernate QueryOver 与WhereRestriction 为 OR

Question

我有这个查询，但我似乎找不到如何将WhereRestrictionOn设置为OR。现在它们的功能为“与”，但我想要一个或另一个。

var privateInfo = Session.QueryOver<ConContact>()
            .JoinAlias(c => c.PrivateInfos, () => pi)
            .WhereRestrictionOn(c => c.FirstName).IsLike(_selectedFirstLetter + "%")
            .WhereRestrictionOn(c => c.LastName).IsLike(_selectedFirstLetter + "%") // todo: change to firstname OR lastname
            .Where(c => c.Status == ContactStatus.Approved)
            .Select(
                Projections.Property("pi.Id").WithAlias(() => sri.Id),
                Projections.Property("FirstName").WithAlias(() => sri.Name), //todo: get fullname here => Add concontact object in privateinfo
                Projections.Property("pi.Address").WithAlias(() => sri.Address),
                Projections.Constant("Contact").WithAlias(() => sri.Type)
            )
            .TransformUsing(Transformers.AliasToBean<SearchResultInfo>())
            .List<SearchResultInfo>()
            .ToList();

非常感谢您的帮助!

解决方案:

var privateInfo = Session.QueryOver<ConContact>()
            .JoinAlias(c => c.PrivateInfos, () => pi)
            .Where(
                Restrictions.Disjunction()
                    .Add(Restrictions.Like("FirstName", _selectedFirstLetter + "%"))
                    .Add(Restrictions.Like("LastName", _selectedFirstLetter + "%"))
            )
            .Where(c => c.Status == ContactStatus.Approved)
            .Select(
                Projections.Property("pi.Id").WithAlias(() => sri.Id),
                Projections.Property("FirstName").WithAlias(() => sri.Name), //todo: get fullname here => Add concontact object in privateinfo
                Projections.Property("pi.Address").WithAlias(() => sri.Address),
                Projections.Constant(NewObjectType.Contact).WithAlias(() => sri.Type)
            )
            .TransformUsing(Transformers.AliasToBean<SearchResultInfo>())
            .List<SearchResultInfo>()
            .ToList();

Answer 1

顶级 .Where() 系列(包括 WhereRestrictionOn) 始终使用 AND 连接。所以我们必须明确使用类似的东西:

• 限制.Or(限制1, 限制1)
• Restrictions.Disjunction().Add(restriction1).Add(restriction2).Add(...

所以，这可能是我们的情况:

.Where(
    Restrictions.Disjunction()
        .Add(Restrictions.On<ConContact>(c => c.FirstName)
                              .IsLike(_selectedFirstLetter, MatchMode.Start))
        .Add(Restrictions.On<ConContact>(c => c.LastName)
                              .IsLike(_selectedFirstLetter, MatchMode.Start))
        // more OR ...
        //.Add(Restrictions.On<ConContact>(c => c.MiddleName)
        //                      .IsLike(_selectedFirstLetter, MatchMode.Start))
)

正如此处讨论的:16.2. Simple Expressions ，对于简单的东西，我们甚至可以使用||(引用小例子):

.Where(p => p.Name == "test name" && (p.Age > 21 || p.HasCar))