19

这个例外:

此 SqlParameterCollection 的索引 n 无效,Count=

通常指向重复的映射信息(参见 Stack Overflow + Google)。我很确定我没有。还有其他原因吗?

我似乎已经确定了问题所在。我介绍了这个:

[DocumentId]
public virtual int GI
{
    get { return base.Id; }
    protected set { base.Id = value; }
} 

通过 lucene.net 使用搜索。这似乎干扰了FNH!我在这里有什么选择?

PS:

at System.Data.SqlClient.SqlParameterCollection.RangeCheck(Int32 index)
   at System.Data.SqlClient.SqlParameterCollection.GetParameter(Int32 index)
   at System.Data.Common.DbParameterCollection.System.Collections.IList.get_Item(Int32 index)
   at NHibernate.Type.Int32Type.Set(IDbCommand rs, Object value, Int32 index)
   at NHibernate.Type.NullableType.NullSafeSet(IDbCommand cmd, Object value, Int32 index)
   at NHibernate.Type.NullableType.NullSafeSet(IDbCommand st, Object value, Int32 index, ISessionImplementor session)
   at NHibernate.Persister.Entity.AbstractEntityPersister.Dehydrate(Object id, Object[] fields, Object rowId, Boolean[] includeProperty, Boolean[][] includeColumns, Int32 table, IDbCommand statement, ISessionImplementor session, Int32 index)
   at NHibernate.Persister.Entity.AbstractEntityPersister.Insert(Object id, Object[] fields, Boolean[] notNull, Int32 j, SqlCommandInfo sql, Object obj, ISessionImplementor session)
   at NHibernate.Persister.Entity.AbstractEntityPersister.Insert(Object id, Object[] fields, Object obj, ISessionImplementor session)
   at NHibernate.Action.EntityInsertAction.Execute()
   at NHibernate.Engine.ActionQueue.Execute(IExecutable executable)
   at NHibernate.Engine.ActionQueue.ExecuteActions(IList list)
   at NHibernate.Engine.ActionQueue.ExecuteActions()
   at NHibernate.Event.Default.AbstractFlushingEventListener.PerformExecutions(IEventSource session)
   at NHibernate.Event.Default.DefaultFlushEventListener.OnFlush(FlushEvent event)
   at NHibernate.Impl.SessionImpl.Flush()
   at SharpArch.Data.NHibernate.DbContext.CommitChanges()
   at Updater1.Program.Main(String[] args) in C:\Users\bla\Documents\Visual Studio 2010\Projects\Bla\Updater1\Program.cs:line 97

PP:

public class MappedSequenceMap : IAutoMappingOverride<MappedSequence>
    {
        public void Override(AutoMapping<MappedSequence> mapping)
        {
            mapping.Id(x => x.Id, "GI").GeneratedBy.Assigned();

            mapping.Map(x => x.Affiliation).Length(10000);
            mapping.Map(x => x.Gene).Length(10000);
            mapping.Map(x => x.OriginalIsolationCountry).Length(10000);
            mapping.Map(x => x.OriginalAffiliation).Length(10000);
            mapping.Map(x => x.PMIDs).Length(10000);
            mapping.Map(x => x.Product).Length(10000);
            mapping.Map(x => x.Fasta).Length(10000);
            mapping.Map(x => x.Note).Length(10000);
            mapping.Map(x => x.Strain).Length(10000);

            mapping.HasManyToMany(x => x.PubmedPublications).Table("SequencesPubmedPublications");
        }
    }
4

3 回答 3

55

答案是:-

a)您在同一类中映射了重复的属性

b)如果您要公开外键并使用 a<many-to-one ...到映射文件中的相关实体,这是可能的。如果是这种情况,请添加 insert="false" and update="false"到外键属性并再次运行。

为了验证这一点,当您使用 fluent 和自动映射时,您需要查看 XML 映射。请参阅此 [链接][2] 和使用ExportTo(..)方法。完成此操作后XML,请查看是否有任何重复的属性甚至重复的映射文件。

在您的情况下,您有两个对 column 的引用GI

<id name="Id" ...>
  <column name="GI" />
  <generator class="assigned" />
</id>

<property name="GI" ...>
  <column name="GI" />
</property>

我认为你不能[DocumentId]Id类属性上设置注释。我认为您可能需要放弃此类的自动映射并通过 fluent 手动配置!

于 2012-05-23T12:34:42.797 回答
5

完全归功于@Rippo,Fluent NHibernate 中对我有帮助的等效答案是:

对于课程:

public class User
{
   public virtual Department {get; set;}
}

public class Department
{
   public virtual ICollection<User> Users {get; set;}
}

如果您对User实体有以下映射:

//Problem mapping
Map(x => x.DepartmentId)          
References(x => x.Department)
   .Column("Id")
   .ForeignKey("DepartmentId")
   .Fetch.Join();

以下是可能的解决方案之一(由于one-to-many- 部分中的双重映射one-Department-to-many-Users):

// !Solution
Map(x => x.DepartmentId)          
References(x => x.Department)
   .Column("Id")
   .ForeignKey("DepartmentId")
   .Fetch.Join()
   .Not.Insert()   // <- added this
   .Not.Update();  // <- and this
于 2016-04-04T12:40:06.097 回答
1

我有这个错误,在我的 Fluent IAutoMappingOverride 类中我有一个 mapping.IgnoreProperty(p => Property),其中 Property 只是一个吸气剂。我删除了 IgnoreMap 语句并修复了它。这是 NH 3.3.1.4。可能与您的问题无关,但希望这对其他人有帮助。

于 2015-03-11T04:07:16.030 回答