FluentNHibernate：使用鉴别器映射 child 集合

Question

使用嵌套集合查看我的 object 不会引发错误，但是在尝试保存实体时出现错误

    [IndexOutOfRangeException: Invalid index 15 for SqlParameterCollection with Count=15.]
   System.Data.SqlClient.SqlParameterCollection.RangeCheck(Int32 index) +5343807
   System.Data.SqlClient.SqlParameterCollection.GetParameter(Int32 index) +19
   System.Data.Common.DbParameterCollection.System.Collections.IList.get_Item(Int32 index) +10
   NHibernate.Type.Int64Type.Set(IDbCommand rs, Object value, Int32 index) +60
   NHibernate.Type.NullableType.NullSafeSet(IDbCommand cmd, Object value, Int32 index) +414
   NHibernate.Type.NullableType.NullSafeSet(IDbCommand st, Object value, Int32 index, Boolean[] settable, ISessionImplementor session) +62
   NHibernate.Type.ManyToOneType.NullSafeSet(IDbCommand st, Object value, Int32 index, Boolean[] settable, ISessionImplementor session) +122
   NHibernate.Persister.Entity.AbstractEntityPersister.Dehydrate(Object id, Object[] fields, Object rowId, Boolean[] includeProperty, Boolean[][] includeColumns, Int32 table, IDbCommand statement, ISessionImplementor session, Int32 index) +344

[PropertyValueException: Error dehydrating property value for PravUprav.Classes.Entities.ClaimCaseInstanceFI.Decision]
   NHibernate.Persister.Entity.AbstractEntityPersister.Dehydrate(Object id, Object[] fields, Object rowId, Boolean[] includeProperty, Boolean[][] includeColumns, Int32 table, IDbCommand statement, ISessionImplementor session, Int32 index) +503
   NHibernate.Persister.Entity.AbstractEntityPersister.Update(Object id, Object[] fields, Object[] oldFields, Object rowId, Boolean[] includeProperty, Int32 j, Object oldVersion, Object obj, SqlCommandInfo sql, ISessionImplementor session) +2013
   NHibernate.Persister.Entity.AbstractEntityPersister.UpdateOrInsert(Object id, Object[] fields, Object[] oldFields, Object rowId, Boolean[] includeProperty, Int32 j, Object oldVersion, Object obj, SqlCommandInfo sql, ISessionImplementor session) +335
   NHibernate.Persister.Entity.AbstractEntityPersister.Update(Object id, Object[] fields, Int32[] dirtyFields, Boolean hasDirtyCollection, Object[] oldFields, Object oldVersion, Object obj, Object rowId, ISessionImplementor session) +1898
   NHibernate.Action.EntityUpdateAction.Execute() +737
   NHibernate.Engine.ActionQueue.Execute(IExecutable executable) +39
   NHibernate.Engine.ActionQueue.ExecuteActions(IList list) +128
   NHibernate.Engine.ActionQueue.ExecuteActions() +48
   NHibernate.Event.Default.AbstractFlushingEventListener.PerformExecutions(IEventSource session) +241
   NHibernate.Event.Default.DefaultFlushEventListener.OnFlush(FlushEvent event) +179
   NHibernate.Impl.SessionImpl.Flush() +295
   NHibernate.Transaction.AdoTransaction.Commit() +189
   Spring.Data.NHibernate.HibernateTransactionManager.DoCommit(DefaultTransactionStatus status) in c:\_prj\spring-net\src\Spring\Spring.Data.NHibernate\Data\NHibernate\HibernateTransactionManager.cs:561

[DataIntegrityViolationException: Error dehydrating property value for PravUprav.Classes.Entities.ClaimCaseInstanceFI.Decision]
   Spring.Data.NHibernate.HibernateTransactionManager.DoCommit(DefaultTransactionStatus status) in c:\_prj\spring-net\src\Spring\Spring.Data.NHibernate\Data\NHibernate\HibernateTransactionManager.cs:577

错误：

Error dehydrating property value for

说我映射了属性两次或实体属性的 DataTypes 不正确，但我检查并没有在我的代码中发现错误。

具有集合的实体：

public class ClaimCase
{
    private IList<ClaimCaseInstance> _claimCaseInstances;
    public virtual IList<ClaimCaseInstance> ClaimCaseInstances
    {
       get { return _claimCaseInstances ?? (_claimCaseInstances = new List<ClaimCaseInstance>()); }
          set { _claimCaseInstances = value; }
     }
}

实体映射：

public sealed class ClaimCaseMap : ClassMap<ClaimCase>
{
   public ClaimCaseMap()
      {
         Table("ClaimCase");
         Id(x => x.Id);                
         HasMany(x => x.ClaimCaseInstances).Inverse().Cascade.AllDeleteOrphan();
       }
 }

ClaimCaseInstance 实体：

public abstract class ClaimCaseInstance
{
    public virtual ClaimCase ClaimCase { get; set; }
    public virtual DicList Result { get; set; }
}

Child 类:

public class ClaimCaseInstanceFI : ClaimCaseInstance
{
    public virtual DicList Decision { get; set; }
}

public class ClaimCaseInstanceAI : ClaimCaseInstance
{
}

映射：

public sealed class ClaimCaseInstanceMap : ClassMap<ClaimCaseInstance>
{
    public ClaimCaseInstanceMap()
    {
        Table("ClaimCaseInstances");
        Id(x => x.Id);            
        DiscriminateSubClassesOnColumn("InstanceType");

        References(x => x.ClaimCase);
        References(x => x.Result);
    }
}

public sealed class ClaimCaseInstanceFIMap : SubclassMap<ClaimCaseInstanceFI>
{
    public ClaimCaseInstanceFIMap()
    {
        DiscriminatorValue((int)CourtTypes.Firts);
        References(x => x.Decision);
    }
}

public sealed class ClaimCaseInstanceAIMap : SubclassMap<ClaimCaseInstanceAI>
{
    public ClaimCaseInstanceAIMap()
    {
        DiscriminatorValue((int)CourtTypes.Appeals);
    }
}

法院类型：

public enum CourtTypes
{
    First = 5,
    Appeals = 6
}

DicList 按照惯例 ForeignKeyConversion 引用映射为 instance.Property.Name + "ID"，它工作正常。

仅在编辑字段 Decision

后保存 ClaimCase 时出错

Answer 1

[IndexOutOfRangeException: Invalid index 15 for SqlParameterCollection with Count=15.]

生成的 SQL 请求似乎有问题。你能展示这个案例的 SQL 声明吗？

Answer 2

批处理命令：命令 0:

批处理命令：

command 0:UPDATE ClaimCase SET CreatedDate = @p0, IsHidden = @p1, InnerNumber = @p2, OdpNumber = @p3, DocumentsDeliveryDate = @p4, CourtPostDate = @p5, IncomingClaimDate = @p6, DisputeDescription = @p7, LawsuitNumber = @p8, TotalPriceResult = @p9, Note = @p10, CourtSector = @p11, CaseClosed = @p12, IsBankrupt = @p13, BankruptDate = @p14, CreatedBy = @p15, CaseCategoryID = @p16, ClaimDirection = @p17, ForeignCuratorID = @p18, InnerContractCuratorID = @p19, DisputeID = @p20, CourtID = @p21, CourtDistrictID = @p22, MunicipalContractID = @p23, BelongToDepartmentID = @p24 WHERE Id = @p25;@p0 = 06.05.2014 9:59:56 [类型：日期时间 (0)]，@p1 = False [类型：布尔值 (0)]，@p2 = 'БИС-7/2014' [类型：字符串 (4000)]，@p3 = '5345345 ' [类型：字符串 (4000)]，@p4 = 15.05.2014 0:00:00 [类型：日期时间 (0)]，@p5 = 17.05.2014 0:00:00 [类型：日期时间 (0)]， @p6 = 08.05.2014 0:00:00 [类型：DateTime (0)]，@p7 = 'предмет спора.' [类型：字符串 (4000)]，@p8 = '534534' [类型：字符串 (4000)]，@p9 = 100,00 [类型：十进制 (0)]，@p10 = NULL [类型：字符串 (4000) ], @p11 = NULL [类型: String (4000)], @p12 = False [类型: Boolean (0)], @p13 = False [类型: Boolean (0)], @p14 = NULL [类型: DateTime ( 0)], @p15 = 7026 [类型: Int64 (0)], @p16 = 23 [类型: Int64 (0)], @p17 = 28 [类型: Int64 (0)], @p18 = 7026 [类型: Int64 (0)], @p19 = 19 [类型: Int64 (0)], @p20 = 14 [类型: Int64 (0)], @p21 = 35 [类型: Int64 (0)], @p22 = 86 [类型：Int64 (0)]，@p23 = 2 [类型：Int64 (0)]，@p24 = 2027 [类型：Int64 (0)]，@p25 = 12347 [类型：Int64 (0)]

下一个：

Could not synchronize database state with session

NHibernate.PropertyValueException: Error dehydrating property value for PravUprav.Classes.Entities.ClaimCaseInstanceFI.Decision ---> System.IndexOutOfRangeException: Недопустимый индекс 16 для SqlParameterCollection с Count=16.

Answer 3

我已经确定了问题的根源。使用好工具 dotPeek (thanks @SergSW for the tip) as symbol server and debug

NHibernate.Persister.Entity.AbstractEntityPersister.Dehydrate()

我发现 sql 语句中更新字段的计数不等于计数

entityMetamodel.PropertySpan

数组 entityMetamodel.Properties 中的某些字段出现了两次。

public sealed class ClaimCaseInstanceMap : ClassMap<ClaimCaseInstance>
    {
        public ClaimCaseInstanceMap()
        {
            Table("ClaimCaseInstances");

            DiscriminateSubClassesOnColumn("InstanceType");

            Id(x => x.Id);  
            References(x => x.ClaimCase);
            Map(x => x.FilingDate);
            References(x => x.Result);
            Map(x => x.PriceResult);
            Map(x => x.ExpenseResult);
            Map(x => x.Comment);
        }
    }

子类：

public sealed class ClaimCaseInstanceFIMap : SubclassMap<ClaimCaseInstanceFI>
{
    public ClaimCaseInstanceFIMap()
    {
        DiscriminatorValue((int)CourtType.Firts);

        Id(x => x.Id);  
        Map(x => x.Price);
        Map(x => x.Expense);
        References(x => x.Decision);
        References(x => x.Determination);
        Map(x => x.DeterminationDate);
        Map(x => x.CourtDateAct);
        Map(x => x.PriceResult);
        Map(x => x.ExpenseResult);
        Map(x => x.CounterClaimDate);
        Map(x => x.Comment);
    }
}

如您所见，此属性：Comment、ExpenseResult、PriceResult。

我没有描述问题中所有字段的映射，这是我的错误，对此深表歉意，感谢您的帮助。

FluentNHibernate：使用鉴别器映射 child 集合

FluentNHibernate: mapping child collection with discriminator

c#

mapping

fluent-nhibernate

discriminator