使用QueryOver时,Nhibernate无法解析属性异常,适用于QueryAll

Question

我有以下问题
基本上我有以下2个片段:

var contactAssociation =
    session.QueryOver<ContactAssociation>(() => contactAssociationAlias)
        .Where(() =>
             contactAssociationAlias.Contact.ID == careGiverId &&
             contactAssociationAlias.Client.ID == clientKey)
        .Where(() =>
             contactAssociationAlias.AclRole.RoleName == "Care Giver")
        .SingleOrDefault();

和

var contactAssociation = session.Query<ContactAssociation>()
    .Where(cr =>
        cr.Contact.ID == careGiverId
        && cr.Client.ID == clientKey)
    .Where(cr =>
        cr.AclRole.RoleName == "Care Giver")
    .SingleOrDefault();

第二个工作第一个输出此错误:

Message=could not resolve property: AclRole.RoleCode of:
SL.STAdmin.DAL.ContactAssociation

有人知道为什么吗？先感谢您

Answer 1

您需要在第一个查询中指定Join.第二个查询中的LINQ提供程序会自动为您执行此操作.

session.QueryOver<ContactAssociation>(() => contactAssociationAlias)
   .Where(() =>
       contactAssociationAlias.Contact.ID == careGiverId &&
       contactAssociationAlias.Client.ID == clientKey)
   .JoinQueryOver(() => contactAssociationAlias.AclRole)
       .Where(a => a.RoleName == "Care Giver")
   .SingleOrDefault();