Question

我正在编写一个通过代码使用NHibernate映射的应用程序。当我将TimeSpan映射为实体的属性时，TimeSpan被正确映射。

但是，如果我将TimeSpan放在组件映射（值对象）中，我会得到一个异常“操作数类型冲突：bigint与时间不兼容” - 即使我确定我使用TimeSpan映射映射TimeSpan。

以下代码将正确保存时间跨度（例如'1753-01-01T08：00：00'）

public class MyEntity
{
    public virtual int Id { get; protected set; }
    public virtual ISet<AnotherEntity> OtherEntities { get; protected set; }
}

public class AnotherEntity
{
    public virtual int Id { get; protected set; }
    public virtual TimeSpan MyTimeSpan { get; protected set; }
}

public class MyEntityMap : ClassMapping<MyEntity>
{
    public MyEntityMap()
    {
        Table("MyEntityTable");
        Id(x => x.Id, map =>
        {
            map.Column("Id");
        });

        Set(x => x.OtherEntities, c =>
        {
            c.Table("OtherEntityTable");
            c.Inverse(true);
            c.Key(k => k.Column("MyEntityId"));
        }, r => r.OneToMany(m =>
        {
            m.NotFound(NotFoundMode.Exception);
            m.Class(typeof(AnotherEntity));
        }));
    }
}

public class AnotherEntityMap : ClassMapping<AnotherEntity>
{
    public AnotherEntityMap()
    {
        Table("AnotherEntityTable");

        Id(x => x.Id, map =>
        {
            map.Column("AnotherEntityId");
        });

        Property(x => x.MyTimeSpan, m => m.Type<TimeAsTimeSpanType>());
    }
}

但是，以下代码将尝试将TimeSpan保存为int（例如288000000000）并抛出异常。（类似地，当它试图水合嵌套值对象时抛出异常。）

public class MyEntity
{
    public virtual int Id { get; protected set; }
    public virtual MyValueObject MyValueObject { get; protected set; }
}

public class MyValueObject
{
    public virtual ISet<NestedValueObject> NestedValueObjects { get; protected set; }
}

public class NestedValueObject
{
    public virtual TimeSpan MyTimeSpan { get; protected set; }
}

public class MyEntityMap : ClassMapping<MyEntity>
{
    public MyEntityMap()
    {
        Table("MyEntityTable");
        Id(x => x.Id, map =>
        {
            map.Column("Id");
        });

        Component(x => x.MyValueObject, c =>
        {
            c.Set(x => x.NestedValueObjects, map =>
            {
                map.Table("NestedValueObjects");
                map.Key(k => k.Column("MyEntityId"));
            }, r => r.Component(n =>
            {
                n.Property(x => x.MyTimeSpan, m => m.Type<TimeAsTimeSpanType>());
            }));
        });
    }
}

映射是否有错误？或者NHibernate映射是否存在代码错误？

Answer 1

我假设这是NHibernate按代码映射的错误，并引发了错误NH-4038。

NHibernate组件映射：操作数类型冲突：bigint与时间

1 个答案: