流利的NHibernate - 錯誤的脫水屬性值;給定鍵不存在在詞典

我有一個叫ProjectTaskBudget類具有IBudgetableIncomeStream類型的屬性，像這樣：流利的NHibernate - 錯誤的脫水屬性值;給定鍵不存在在詞典

public class ProjectTaskBudget 
{ 
    public virtual IBudgetableIncomeStream BudgetableIncomeStream { get; set; } 
}

IBudgetableIncomeStream是套用至，除其他事項外接口，叫做抽象類Deliverable：

public abstract class Deliverable : IBudgetableIncomeStream 
{ 
    // Some stuff 
}

和具體類稱爲RecurringIncomeLine：

public class RecurringIncomeLine : IBudgetableIncomeStream 
{ 
    // Some stuff 
}

從Deliverable繼承的具體類是DeliverableItem和DeliverableTime。

爲ProjectTaskBudget的映射是這樣的：

public class ProjectTaskBudgetMap : MappingBase<ProjectTaskBudget> 
{ 
    public ProjectTaskBudgetMap() 
    { 
     ReferencesAny(n => n.BudgetableIncomeStream) 
      .EntityTypeColumn("IncomeStreamType") 
      .EntityIdentifierColumn("IncomeStream_id") 
      .AddMetaValue<Deliverable>("Deliverable") 
      .AddMetaValue<RecurringIncomeLine>("RecurringIncomeLine") 
      .IdentityType<Guid>(); 
    } 
}

這工作，因爲它應該與RecurringIncomeLine，所以我懷疑問題是與抽象/接口映射做。當我嘗試新的ProjectTaskBudget添加到使用Deliverable數據庫，同花順，我得到這個錯誤：

NHibernate.PropertyValueException: Error dehydrating property value for xxx.xxx.xxx.ProjectTaskBudget.BudgetableIncomeStream ---> System.Collections.Generic.KeyNotFoundException: The given key was not present in the dictionary. 
    at System.Collections.Generic.Dictionary`2.get_Item(TKey key) 
    at NHibernate.Type.MetaType.NullSafeSet(IDbCommand st, Object value, Int32 index, ISessionImplementor session) 
    at NHibernate.Type.AnyType.NullSafeSet(IDbCommand st, Object value, Int32 index, Boolean[] settable, 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) 
    --- End of inner exception stack trace --- 
    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 hiJump.Infrastructure.DataAccess.EventListeners.FixedDefaultFlushEventListener.PerformExecutions(IEventSource session) in c:\code\Git\Harmony\SharedCode\hiJump\hiJump.Infrastructure\DataAccess\EventListeners\FixedDefaultFlushEventListener.cs:line 35 
    at NHibernate.Event.Default.DefaultFlushEventListener.OnFlush(FlushEvent event) 
    at NHibernate.Impl.SessionImpl.Flush()

我想知道如果直接應用接口DeliverableItem和DeliverableTime會有所作爲，並有映射包括

.AddMetaValue<DeliverableItem>("DeliverableItem") 
.AddMetaValue<DeliverableTime>("DeliverableTime")

但是這是一個相當大的重構，所以我想先檢查，看看我是缺少什麼更明顯，或者如果聽起來像廢話。

來源

2013-02-14 Colm Prunty

它的工作，如果你只是刪除'.AddMetaValue （「交付」）'和'添加.AddMetaValue （「DeliverableItem」）'和'.AddMetaValue （「DeliverableTime」）'不實際改變班級？更改類應該是不必要的，因爲它們已經通過它們的基類實現了'IBudgetableIncomeStream'。 – 2013-02-14 10:18:36

我曾嘗試過，忘記提及它會返回相同的錯誤。 – 2013-02-14 10:23:38

請確保NHibernate不會將'Deliverable'保存到自己的表中。 – 2013-02-14 10:26:43

好的，我想通了。問題在於映射，但不是我的想法。

的IBudgetableIncomeStream它試圖增加實際上的東西，從DeliverableItem得來，所以映射 DeliverableItem是不夠的，我必須把在映射的 DeliverableItem和DeliverableTime每個子類中，如：

.AddMetaValue<DeliverableItemSubclass1>("DeliverableItemSubclass1") 
.AddMetaValue<DeliverableItemSubclass2>("DeliverableItemSubclass2") 
.AddMetaValue<DeliverableTimeSubclass1>("DeliverableTimeSubclass1")

來源

2013-02-14 19:15:20

流利的NHibernate - 錯誤的脫水屬性值;給定鍵不存在在詞典

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