Question

我得到了这个例外

无法获得字段值反射吸气剂 DictionaryMaster。k__BackingField



with this inner exception:


  Field '<>k__BackingField' defined on
  type  is not a field on the target
  object which is of type
  'System.Object[]'.


The problem exists only when i use eagerloading in query. Below i put my classes, relations and query.

public class DictionaryMaster
    {
        public virtual IList<DictionaryItem> DictionaryItems { get; private set; }
        public virtual System.String Code { get; private set; }
        public virtual System.String Description { get; private set; }
    }

   public class DictionaryMasterMap : ClassMap<DictionaryMaster>
    {
        public DictionaryMasterMap()
        {
            Cache.ReadOnly().Region("dictionary");
            LazyLoad();

            Id(x => x.Code) //i know this is so ugly
                .Column("DC_Code")
                .GeneratedBy.Assigned(); 
            Map(x => x.Description).Column("DC_Desc");
            HasMany(x => x.DictionaryItems)
                .Cascade.AllDeleteOrphan()
                .Fetch.Select()
                .AsBag()
                .Inverse()
                .Not.LazyLoad()
                .KeyColumns.Add("DI_DCCode");
        }
    }

 public class DictionaryItem
    {
        public virtual int Id { get; private set; }
        public virtual string Code { get; private set; }
        public virtual DictionaryMaster DictionaryMaster { get; private set; }
        public virtual string Description { get; private set; }
}

   public class DictionaryItemMap : ClassMap<DictionaryItem>
    {
        public DictionaryItemMap()
        {
            Cache.ReadOnly().Region("dictionary");

            Id(x => x.Id)
                .Column("DI_Id").GeneratedBy.Identity();

            Map(x => x.Code).Column("DI_Code");
            Map(x => x.Description).Column("DI_Desc");
            References(x => x.DictionaryMaster).Column("DI_DCCode");
        }
    }


Query:

public class DictionaryMaster
    {
        public virtual IList<DictionaryItem> DictionaryItems { get; private set; }
        public virtual System.String Code { get; private set; }
        public virtual System.String Description { get; private set; }
    }

   public class DictionaryMasterMap : ClassMap<DictionaryMaster>
    {
        public DictionaryMasterMap()
        {
            Cache.ReadOnly().Region("dictionary");
            LazyLoad();

            Id(x => x.Code) //i know this is so ugly
                .Column("DC_Code")
                .GeneratedBy.Assigned(); 
            Map(x => x.Description).Column("DC_Desc");
            HasMany(x => x.DictionaryItems)
                .Cascade.AllDeleteOrphan()
                .Fetch.Select()
                .AsBag()
                .Inverse()
                .Not.LazyLoad()
                .KeyColumns.Add("DI_DCCode");
        }
    }

 public class DictionaryItem
    {
        public virtual int Id { get; private set; }
        public virtual string Code { get; private set; }
        public virtual DictionaryMaster DictionaryMaster { get; private set; }
        public virtual string Description { get; private set; }
}

   public class DictionaryItemMap : ClassMap<DictionaryItem>
    {
        public DictionaryItemMap()
        {
            Cache.ReadOnly().Region("dictionary");

            Id(x => x.Id)
                .Column("DI_Id").GeneratedBy.Identity();

            Map(x => x.Code).Column("DI_Code");
            Map(x => x.Description).Column("DI_Desc");
            References(x => x.DictionaryMaster).Column("DI_DCCode");
        }
    }

Answer 1

我怀疑很多用户都面临着这个问题 - 也许如果您将答案标记为所选答案，那么问题就会得到更多关注。 AFAIK仍然没有允许在同一个呼叫中使用Linq，Cacheable（）和Fetch（）的解决方法。

这是一个评论，但可能是因为我的SO排名很低，我还无法创建评论。

干杯，

Jonno

Answer 2

我发现了什么问题：

首先：我真的不知道为什么Fluent NHibernate使用FieldBacking映射我的Id，因为我有属性访问权。

第二：当我为setter删除private修饰符时，它显示了这个异常：

异常发生了xxx的getter

这个例外让我进入了这个页面https://nhibernate.jira.com/browse/NH-2587。现在我想知道一些解决方法。有任何想法吗？

无法通过反射getter获取字段值... nhibernate查询缓存具有二级缓存

2 个答案: