我有一个类（项目），它代表一个有点大的数据库表。除了一个子类（ProjectUses，它代表另一个与 Project 具有 1:1 关系的数据库表）之外，我只需要检索大约十几个列。我可以使用如下所示的投影很好地获得 Project 对象的单列，但是在检索 Project 对象并填充 ProjectUses 子类时也遇到了问题。谁能指出我正确的方向？
这是我正在使用的存储库代码：
public Project GetProjectDebenture(int pkProjectID)
{
var proj = _session.CreateCriteria(typeof(Project))
.SetProjection(Projections.ProjectionList()
.Add(Projections.Property("pkProjectID"), "pkProjectID")
.Add(Projections.Property("ReservePercentage"), "ReservePercentage")
.Add(Projections.Property("FundingFeePercentage"), "FundingFeePercentage")
.Add(Projections.Property("PackagingFeePercentage"), "PackagingFeePercentage")
)
.SetResultTransformer(Transformers.AliasToBean(typeof(Project)))
.Add(Restrictions.Eq("pkProjectID", pkProjectID))
.UniqueResult<Project>();
return proj;
}
return null;
}
我尝试使用Projections.Property("ProjectUses")并Projections.GroupProperty("ProjectUses")检索填充的子类，但没有成功。
下面是类和映射定义的[简化]代码
// Project class
public partial class Project
{
public int pkProjectID { get; set; }
public decimal ReservePercentage { get; set; }
public decimal FundingFeePercentage { get; set; }
public decimal PackagingFeePercentage { get; set; }
public ProjectUses ProjectUses { get; set; }
}
// ProjectUses class
public partial class ProjectUses
{
public int pkProjectID { get; set; }
public Project Project { get; set; }
...
}
// Project mapping
public class ProjectMap : ClassMap<Project>
{
public ProjectMap()
{
Table(@"Project");
LazyLoad();
Id(x => x.pkProjectID)
.Column("pkProjectID")
.Not.Nullable()
.GeneratedBy.Identity();
...
HasOne<ProjectUses>(x => x.ProjectUses)
.PropertyRef(r => r.Project)
.Cascade.All();
}
}
// Project Uses mapping
public class ProjectUsesMap : ClassMap<ProjectUses>
{
public ProjectUsesMap()
{
Table(@"ProjectUses");
LazyLoad();
Id(x => x.pkProjectID, "pkProjectID").GeneratedBy.Foreign("Project");
HasOne<Project>(x => x.Project)
.Constrained()
.ForeignKey()
.Cascade.None();
...
}
}