Question

我read many posts这里有关标题中提到的异常。通常，此异常意味着我将字段映射到一个实体。我花了很多时间看着我的映射，但仍然找不到什么问题。能否帮助我理解这里做错了什么：

public class CustomerSegment : ModelEntity, IEntityDescriptor
{
    public const string Standart = "Standard";

    public virtual string Name { get; set; }
    public virtual NetworkNHMapped Network { get; set; }

    public virtual string GetDescriptor()
    {
        return Name;
    }
}

public class CustomerSegmentMap : ClassMap<CustomerSegment>
{
    public CustomerSegmentMap()
    {
        Table("NetworkProperty");
        Id(x => x.Id).Column("NetworkPropertyId");
        Map(x => x.Name).Column("PropertyName");
        References(x => x.Network).Column("NetworkId");
    }
}

}

当我尝试从DB获取所有CustomerSegment实体时发生异常。

其他实体的代码：

public class NetworkNHMapped : ModelEntity
{
    [StringLength(50)]
    public virtual string Name { get; set; }
    public virtual int NetworkOwnerId { get; set; }
    public virtual int NetworkTypeId { get; set; }

    public virtual RepairShop.NetworkType NetworkType { get { return (RepairShop.NetworkType)NetworkTypeId; } }
}

public class NetworkNewMap : ClassMap<NetworkNHMapped>
{
    public NetworkNewMap()
    {
        Table("Network");
        Id(x => x.Id, "NetworkId");
        Map(x => x.Name, "NetworkName");
        Map(x => x.NetworkOwnerId, "NetworkOwnerId");
        Map(x => x.NetworkTypeId, "NetworkType");
    }
}

基础ModelEntity：

public virtual int Id { get; set; }

    public override int GetHashCode()
    {
        if (!IsPersisted())
        {
            return base.GetHashCode();
        }

        unchecked
        {
            int result = GetObjectRealType(this).GetHashCode();
            result = 42 * result + Id.GetHashCode();
            return result;
        }
    }

    public override bool Equals(object other)
    {
        if (ReferenceEquals(this, other))
        {
            return true;
        }

        if ((other == null) || !(other is ModelEntity))
        {
            return false;
        }

        var thisType = GetObjectRealType(this);
        var otherType = GetObjectRealType(other);

        if (thisType != otherType)
            return false;

        if (Id.Equals(default(long)) && (other as ModelEntity).Id.Equals(default(long)))
        {
            return base.Equals(other);
        }
        return Id == (other as ModelEntity).Id;
    }

    public static bool operator ==(ModelEntity entity1, ModelEntity entity2)
    {
        var obj1 = (object)entity1;
        if (obj1 == null && ((object)entity2) == null)
            return true;

        return obj1 != null && entity1.Equals(entity2);
    }

    public static bool operator !=(ModelEntity entity1, ModelEntity entity2)
    {
        return !(entity1 == entity2);
    }

    public virtual bool IsPersisted()
    {
        return Id > 0;
    }

    protected static Type GetObjectRealType(object obj)
    {
        return (obj is INHibernateProxy) ? NHibernateUtil.GetClass(obj) : obj.GetType();
    }

}

Answer 1

我要做的第一件事是查看正在生成的XML文件，如果您有相同属性的重复映射，则会显示。

如果您正在使用NH和ModelMapper，那么只需拨打WriteAllXmlMapping即可：例如： -

var mapper = new ModelMapper();
mapper.AddMappings(typeof(CmsMeta).Assembly.GetTypes());

//This will write all the XML into the bin/mappings folder
mapper.CompileMappingForEachExplicitlyAddedEntity().WriteAllXmlMapping();

如果您正在使用Fluent NHibernate，请查看此blog post以导出您的XML。

生成XML后我打赌你会发现重复的映射！否则请参阅此blog post，如果您正在向映射文件中的相关实体公开外键以及使用many-to-one ...，则可能会出现这种情况。如果是这种情况，请将insert =“false”和update =“false”添加到外键属性并再次运行。

无论哪种方式生成XML并查看，如果您看不到它将相关的XML文件发布到您的问题中，我们将会看一看。

此SqlParameterCollection的索引N无效，Count = N“服务器错误

1 个答案: