Nhibernate 在插入时添加了重复的列

Question

我正在使用 Fluent NHibernate。我有一个名为 Audit 的 class，它具有 ItemID 属性。每次我想在 table 中保存任何内容时，都会给我这个错误。

错误信息： 在 INSERT 的 SET 子句或列列表中多次指定列名 'itemid'。在同一子句中不能为一列分配多个值。修改子句以确保列只更新一次。如果此语句更新列或将列插入视图，列别名可以隐藏代码中的重复项。

类

public class Audit : EntityBase
{
    /*********
    ** Accessors
    *********/
    /// <summary>When the action was logged.</summary>
    public virtual DateTime Date { get; set; }

    /// <summary>The person who triggered the action.</summary>
    public virtual BasicUser User { get; set; }

    /// <summary>The name of the related group, used for filtering (e.g. idea, system-settings, site-editor)</summary>
    public virtual string ItemGroup { get; set; }

    /// <summary>The ID of the related entity.</summary>
    public virtual int ItemID { get; set; }

    /// <summary>The title of the related entity.</summary>
    public virtual LocalizableString ItemTitle { get; set; }

    /*********
    ** Public methods
    *********/
    /// <summary>Construct an instance.</summary>
    public Audit() { }
}

映射：

public class AuditMapper<T> : IEntityMapper<T>
    where T : Audit
{
    public virtual void ExtendDomainModel(IEntityMetadata<T> metadata)
    {
        metadata.MapTablePerClassHierarchy<Audit, T>("`ItemGroup`");

        if (!metadata.IsSubclass)
        {
            metadata.Map.ManyToOne(entity => entity.User, relation => relation.Column("`userid`"));
            metadata.Map.Property(c => c.ItemGroup, mapper =>
                    {
                        mapper.Insert(false);
                        mapper.Update(false);
                    });
            metadata.Map.Property(c => c.ItemID, mapper => mapper.Column("itemid"));
        }
        else
        {
            metadata.MapSubclass.ManyToOne(entity => entity.User, relation => relation.Column("`userid`"));
            metadata.MapSubclass.Property(c => c.ItemGroup, mapper =>
                    {
                        mapper.Insert(false);
                        mapper.Update(false);
                    });
            metadata.MapSubclass.Property(c => c.ItemID, mapper =>
                    {
                        mapper.Insert(false);
                        mapper.Update(false);
                    });
        }
    }
}

SQL 查询:

INSERT INTO [brainbank].[idealink.core.audit] ([date], [userid], itemid, [itemtitle_key], [itemtitle_original], [itemid], [ ItemGroup]) VALUES (@p0, @p1, @p2, @p3, @p4, @p5, 'IdeaAudit'); select SCOPE_IDENTITY()

Answer 1

我在我的映射器中修复了这个问题。

我改了

        metadata.Map.Property(c => c.ItemID, mapper => mapper.Column("itemid"));

到

        metadata.Map.Property(c => c.ItemID, mapper =>
                {
                    mapper.Insert(false);
                    mapper.Update(false);
                });

Nhibernate 在插入时添加了重复的列

Nhibernate added duplicate column on insert

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