流畅的NHibernate自动化基类覆盖

时间:2011-06-01 12:58:47

标签: c# .net nhibernate fluent-nhibernate automapping

我有以下基类。

public abstract class BaseEntity
{
    public virtual long Id { get; set; }
    public virtual DateTime CreateDate { get; set; }
    public virtual DateTime? UpdateDate { get; set; }
    public virtual bool IsDeleted { get; set; }
    public virtual string CreatedBy { get; set; }
}

它是所有实体的基类。

例如,

public class Task : BaseEntity
{
    public virtual string Name {get;set;}
}

我有一个初始化程序,

public class Initializer
{
    public static AutoPersistenceModel MapEntities()
    {
        var p = AutoMap
            .AssemblyOf<User>(new MyDefaultAutomappingConfiguration())
             .IgnoreBase<BaseEntity>()
            .UseOverridesFromAssemblyOf<Initializer>()
            .Override<BaseEntity>(map =>
            {
                map.Map(b => b.CreateDate).Not.Nullable().Not.Update();
                map.Map(b => b.CreatedBy).Not.Nullable().Length(100);
                map.Map(b => b.ModifiedBy).Length(100);
                map.Map(b => b.DeletedBy).Length(100);
                map.Map(b => b.IsDeleted).Not.Nullable().Default("0");
            });
        return p;
    }
}

当然在数据库中 - CreateDate是datetime,null,而CreatedBy是nvarchar(255)。

如何配置此AutoMapper以将这些映射从基类到所有子类?

1 个答案:

答案 0 :(得分:3)

您无法覆盖基类的映射,因为实际上并未创建该映射。如果要继续使用Automapper,可以创建约定

public class BaseEntityPropertiesConvention : IPropertyConvention
{
    public void Apply(IPropertyInstance instance)
    {
        if (instance.EntityType.IsSubclassOf(typeof(BaseEntity)))
        {
            switch instance.Name
            {
                case "CreatedDate":
                    instance.Not.Nullable().Not.Update();
                    break;
                case "CreatedBy":
                    instance.Not.Nullable().Length(100);
                    break;
                //etc...
            }
        }
    }
}