Question

我对nhibernate有一段时间的问题而且从来没有能够解决，试着清楚地描述问题。我想使用NHibernate的功能将通过FK连接的对象列表保存并编辑到级联的父对象。我无法理解我错在哪里，谁可以帮助我？

数据库上的表格是：

CREATE TABLE [Evento].[Eventi](
    [CodiceEvento] [varchar](20) NOT NULL,
    [CodiceTipoEvento] [smallint] NOT NULL,
    [CodiceTipoAltroEvento] [smallint] NULL,
    [CodiceTipoClasseEvento] [tinyint] NOT NULL,
    [CodiceTipoCausaEvento] [tinyint] NULL,
    [CodiceTipoStatoSchedaEvento] [tinyint] NOT NULL,
    [DescrizioneEvento] [varchar](1000) NULL
 CONSTRAINT [PK_Eventi] PRIMARY KEY CLUSTERED 
(
    [CodiceEvento] ASC
)


CREATE TABLE [Evento].[EventiDettaglioBeneInteressato](
    [CodiceEvento] [varchar](20) NOT NULL,
    [PrgOrdinamento] [tinyint] NOT NULL,
    [CodiceTipoBeneRFI] [smallint] NOT NULL,
    [DescrizioneAltroBeneRFI] [varchar](255) NULL,
    [CodiceTipoRame] [varchar](25) NULL,
    [CodiceTipoUnitaMisura] [tinyint] NULL,
    [NumQuantita] [bigint] NULL,
 CONSTRAINT [PK_EventiDettaglioBeneInteressato] PRIMARY KEY CLUSTERED 
(
    [CodiceEvento] ASC,
    [PrgOrdinamento] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
) ON [PRIMARY]

GO

SET ANSI_PADDING OFF
GO

ALTER TABLE [Evento].[EventiDettaglioBeneInteressato]  WITH NOCHECK ADD  CONSTRAINT [FK_EventiDettaglioBeneInteressato_Eventi] FOREIGN KEY([CodiceEvento])
REFERENCES [Evento].[Eventi] ([CodiceEvento])
ON DELETE CASCADE
NOT FOR REPLICATION 
GO

映射事件：

<?xml version="1.0" encoding="utf-8"?>
<hibernate-mapping assembly="Data.Model" namespace="Data.Model.Domain.Eventi" xmlns="urn:nhibernate-mapping-2.2">
  <class name="Eventi" table="Eventi" lazy="true" schema="Evento">
    <id name="CodiceEvento" column="CodiceEvento" />

    <many-to-one name="TipiEvento" update="false" insert="false">
      <column name="CodiceTipoEvento" sql-type="smallint" not-null="true" />
    </many-to-one>
    <property name="CodiceTipoEvento" >
      <column name="CodiceTipoEvento" sql-type="smallint" not-null="true" />
    </property>

    <many-to-one name="TipiAltroEvento" update="false" insert="false">
      <column name="CodiceTipoAltroEvento" sql-type="smallint" not-null="false" />
    </many-to-one>
    <property name="CodiceTipoAltroEvento" >
      <column name="CodiceTipoAltroEvento" sql-type="smallint" not-null="false" />
    </property>

    <many-to-one name="TipiClasseEvento" update="false" insert="false">
      <column name="CodiceTipoClasseEvento" sql-type="tinyint" not-null="true" />
    </many-to-one>
    <property name="CodiceTipoClasseEvento">
      <column name="CodiceTipoClasseEvento" sql-type="tinyint" not-null="true" />
    </property>

    <many-to-one name="TipiCausaEvento" update="false" insert="false">
      <column name="CodiceTipoCausaEvento" sql-type="tinyint" />
    </many-to-one>
    <property name="CodiceTipoCausaEvento" >
      <column name="CodiceTipoCausaEvento" sql-type="tinyint" />
    </property>

    <many-to-one name="TipiStatoSchedaEvento" update="false" insert="false">
      <column name="CodiceTipoStatoSchedaEvento" sql-type="tinyint" not-null="true" />
    </many-to-one>
    <property name="CodiceTipoStatoSchedaEvento">
      <column name="CodiceTipoStatoSchedaEvento" sql-type="tinyint" not-null="true" />
    </property>

    <many-to-one name="GestoriAsset" update="false" insert="false">
      <column name="CodiceGestoreAsset" sql-type="int" not-null="false" />
    </many-to-one>
    <property name="CodiceGestoreAsset">
      <column name="CodiceGestoreAsset" sql-type="int" not-null="false" />
    </property>

    <many-to-one name="TipiOraEvento" update="false" insert="false">
      <column name="CodiceTipoOraEvento" sql-type="tinyint" not-null="false" />
    </many-to-one>
    <property name="CodiceTipoOraEvento">
      <column name="CodiceTipoOraEvento" sql-type="tinyint" not-null="false" />
    </property>

    <many-to-one name="TipiAutoreEvento" update="false" insert="false">
      <column name="CodiceTipoAutoreEvento" sql-type="smallint" not-null="false" />
    </many-to-one>
    <property name="CodiceTipoAutoreEvento">
      <column name="CodiceTipoAutoreEvento" sql-type="smallint" not-null="false" />
    </property>

    <many-to-one name="TipiSegnalazioneEvento" update="false" insert="false">
      <column name="CodiceTipoSegnalazioneEvento" sql-type="smallint" not-null="false" />
    </many-to-one>
    <property name="CodiceTipoSegnalazioneEvento">
      <column name="CodiceTipoSegnalazioneEvento" sql-type="smallint" not-null="false" />
    </property>

    <property name="DescrizioneEvento">
      <column name="DescrizioneEvento" sql-type="varchar" not-null="false" />
    </property>

    <bag name="EventiDettaglio" table="EventiDettaglioBeneInteressato" schema="Evento" inverse="true" cascade="all,delete-orphan" >
      <key column="CodiceEvento" />
      <one-to-many class="EventiDettaglioBeneInteressato" />
    </bag> 

</class>
</hibernate-mapping>

域名模型：

using System;
using System.Text;
using System.Collections.Generic;
using Data.Model.Attributes;

namespace Data.Model.Domain.Eventi
{

    [Serializable, Observable]
    public class Eventi : Entity, IEntity
    {

        public Eventi()
        {
            EventiDettaglio = new List<EventiDettaglioBeneInteressato>();
        }

        public virtual string CodiceEvento { get; set; }
        public virtual string DescrizioneEvento { get; set; }

        public virtual TipiEvento TipiEvento { get; set; }
        public virtual TipiAltroEvento TipiAltroEvento { get; set; }
        public virtual TipiClasseEvento TipiClasseEvento { get; set; }
        public virtual TipiCausaEvento TipiCausaEvento { get; set; }
        public virtual TipiStatoSchedaEvento TipiStatoSchedaEvento { get; set; }
        public virtual GestoriAsset GestoriAsset { get; set; }
        public virtual TipiOraEvento TipiOraEvento { get; set; }
        public virtual TipiAutoreEvento TipiAutoreEvento { get; set; }
        public virtual TipiSegnalazioneEvento TipiSegnalazioneEvento { get; set; }

        public virtual short CodiceTipoEvento { get; set; }
        public virtual short? CodiceTipoAltroEvento { get; set; }
        public virtual byte CodiceTipoClasseEvento { get; set; }
        public virtual byte? CodiceTipoCausaEvento { get; set; }
        public virtual byte CodiceTipoStatoSchedaEvento { get; set; }
        public virtual int? CodiceGestoreAsset { get; set; }
        public virtual byte? CodiceTipoOraEvento { get; set; }
        public virtual short? CodiceTipoAutoreEvento { get; set; }
        public virtual short? CodiceTipoSegnalazioneEvento { get; set; }       

        public virtual IList<EventiDettaglioBeneInteressato> EventiDettaglio { get; set; }


        #region NHibernate Composite Key Requirements
        public override bool Equals(object obj)
        {
            if (obj == null) return false;
            var t = obj as Eventi;
            if (t == null) return false;
            if (CodiceEvento == t.CodiceEvento)
                return true;

            return false;
        }
        public override int GetHashCode()
        {
            int hash = GetType().GetHashCode();
            hash = (hash * 397) ^ CodiceEvento.GetHashCode();

            return hash;
        }
        #endregion
    }
}

映射EventiDettaglioBeneInteressato：

<?xml version="1.0" encoding="utf-8"?>
<hibernate-mapping assembly="Data.Model" namespace="Data.Model.Domain.Eventi" xmlns="urn:nhibernate-mapping-2.2">
  <class name="EventiDettaglioBeneInteressato" table="EventiDettaglioBeneInteressato" schema="Evento" lazy="true" >

    <composite-id>
      <key-property name="PrgOrdinamento" column="PrgOrdinamento" />
      <key-many-to-one class="Data.Model.Domain.Eventi.Eventi, Data.Model" name="Evento">
        <column name="CodiceEvento" />       
      </key-many-to-one> 
    </composite-id>   


    <property name="DescrizioneAltroBeneRFI">
      <column name="DescrizioneAltroBeneRFI" sql-type="varchar" not-null="false" />
    </property>
    <property name="NumQuantita">
      <column name="NumQuantita" sql-type="bigint" not-null="false" />
    </property>

    <many-to-one name="TipiBeneRFI" update="false" insert="false">
      <column name="CodiceTipoBeneRFI" sql-type="smallint" not-null="true" />
    </many-to-one>
    <property name="CodiceTipoBeneRFI">
      <column name="CodiceTipoBeneRFI" sql-type="smallint" not-null="true" />
    </property>

    <many-to-one name="TipiRame" update="false" insert="false">
      <column name="CodiceTipoRame" sql-type="varchar" not-null="false" />
    </many-to-one>
    <property name="CodiceTipoRame">
      <column name="CodiceTipoRame" sql-type="varchar" not-null="false" />
    </property>

    <many-to-one name="TipiUnitaMisura" update="false" insert="false">
      <column name="CodiceTipoUnitaMisura" sql-type="tinyint" not-null="false" />
    </many-to-one>
    <property name="CodiceTipoUnitaMisura">
      <column name="CodiceTipoUnitaMisura" sql-type="tinyint" not-null="false" />
    </property>

  </class>
</hibernate-mapping>

域名模型：

using System;
using System.Text;
using System.Collections.Generic;
using NHibernate.Proxy;

namespace Data.Model.Domain.Eventi
{
    [Serializable]
    public class EventiDettaglioBeneInteressato : Entity, IEntity
    {
        public virtual Eventi Evento { get; set; }
        public virtual byte PrgOrdinamento { get; set; }

        public virtual TipiBeneRFI TipiBeneRFI { get; set; }
        public virtual TipiRame TipiRame { get; set; }
        public virtual TipiUnitaMisura TipiUnitaMisura { get; set; }


        public virtual short CodiceTipoBeneRFI { get; set; }
        public virtual string CodiceTipoRame { get; set; }
        public virtual byte? CodiceTipoUnitaMisura { get; set; }


        public virtual string DescrizioneAltroBeneRFI { get; set; }
        public virtual long? NumQuantita { get; set; }

        #region NHibernate Composite Key Requirements
        public override int GetHashCode()
        {
            unchecked
            {
                int hash = GetType().GetHashCode();
                hash = (hash * 397) ^ PrgOrdinamento.GetHashCode();
                hash = (hash * 397) ^ (Evento == null ? 0.GetHashCode() : Evento.GetHashCode());
                return hash;
            }
        }

        public override bool Equals(object obj)
        {
            return Equals(obj as EventiDettaglioBeneInteressato);
        }

        public virtual bool Equals(EventiDettaglioBeneInteressato other)
        {
            if (other == null)
            {
                return false;
            }

            if (ReferenceEquals(other, this))
            {
                return true;
            }

            var otherType = NHibernateProxyHelper.GetClassWithoutInitializingProxy(other);
            var thisType = NHibernateProxyHelper.GetClassWithoutInitializingProxy(this);
            if (!otherType.Equals(thisType))
            {
                return false;
            }

            bool otherIsTransient = Equals(other.Evento, null) && Equals(other.PrgOrdinamento, 0);
            bool thisIsTransient = Equals(Evento, null) && Equals(PrgOrdinamento, 0);
            if (otherIsTransient || thisIsTransient)
                return false;

            return Equals(other, this);
        }

        private bool Equals(EventiDettaglioBeneInteressato a, EventiDettaglioBeneInteressato b)
        {
            if (a.Evento == b.Evento
                && a.PrgOrdinamento == b.PrgOrdinamento)
                return true;

            return false;
        }
        #endregion
    }
}

测试：

    [TestMethod]
    public void EventoTest_Add_Child_BeniInteressati()
    {
        var codiceEvento = "20140630_013325_BA";
        using (var session = IoC.Container.Resolve<ISessionFactory>().OpenSession())
        {
            var evento = session.Get<Data.Model.Domain.Eventi.Eventi>(codiceEvento);

            Assert.AreEqual(evento.EventiDettaglio.Count, 0);

            var beneInteressato = new Data.Model.Domain.Eventi.EventiDettaglioBeneInteressato();
            beneInteressato.PrgOrdinamento = 1;
            beneInteressato.Evento = evento;
            beneInteressato.CodiceTipoBeneRFI = 1;

            evento.EventiDettaglio.Add(beneInteressato);

            var beneInteressato2 = new Data.Model.Domain.Eventi.EventiDettaglioBeneInteressato();
            beneInteressato.PrgOrdinamento = 2;
            beneInteressato.Evento = evento;
            beneInteressato.CodiceTipoBeneRFI = 2;

            evento.EventiDettaglio.Add(beneInteressato2);

            session.SaveOrUpdate(evento);
            session.Flush();
        }
    }

Error:

Message:
Cannot insert the value NULL into column 'CodiceEvento', table 'Evento.EventiDettaglioBeneInteressato'; column does not allow nulls. INSERT fails.
The statement has been terminated.

StackTrace:
   at System.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection, Action`1 wrapCloseInAction)
   at System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection, Action`1 wrapCloseInAction)
   at System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj, Boolean callerHasConnectionLock, Boolean asyncClose)
   at System.Data.SqlClient.TdsParser.TryRun(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj, Boolean& dataReady)
   at System.Data.SqlClient.SqlCommand.FinishExecuteReader(SqlDataReader ds, RunBehavior runBehavior, String resetOptionsString)
   at System.Data.SqlClient.SqlCommand.RunExecuteReaderTds(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, Boolean async, Int32 timeout, Task& task, Boolean asyncWrite, SqlDataReader ds)
   at System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method, TaskCompletionSource`1 completion, Int32 timeout, Task& task, Boolean asyncWrite)
   at System.Data.SqlClient.SqlCommand.InternalExecuteNonQuery(TaskCompletionSource`1 completion, String methodName, Boolean sendToPipe, Int32 timeout, Boolean asyncWrite)
   at System.Data.SqlClient.SqlCommand.ExecuteNonQuery()
   at System.Data.SqlClient.SqlCommand.ExecuteBatchRPCCommand()
   at System.Data.SqlClient.SqlCommandSet.ExecuteNonQuery()
   at NHibernate.AdoNet.SqlClientSqlCommandSet.ExecuteNonQuery()
   at NHibernate.AdoNet.SqlClientBatchingBatcher.DoExecuteBatch(IDbCommand ps)

LOG:

18:15:25.695 [10] WARN  NHibernate.Engine.ForeignKeys - Unable to determine if Data.Model.Domain.Eventi.EventiDettaglioBeneInteressato with assigned identifier Data.Model.Domain.Eventi.EventiDettaglioBeneInteressato is transient or detached; querying the database. Use explicit Save() or Update() in session to prevent this.
18:15:25.716 [10] WARN  NHibernate.Engine.ForeignKeys - Unable to determine if Data.Model.Domain.Eventi.EventiDettaglioBeneInteressato with assigned identifier Data.Model.Domain.Eventi.EventiDettaglioBeneInteressato is transient or detached; querying the database. Use explicit Save() or Update() in session to prevent this.
18:15:25.960 [10] WARN  NHibernate.Util.ADOExceptionReporter - System.Data.SqlClient.SqlException (0x80131904): Cannot insert the value NULL into column 'CodiceEvento', table 'Evento.EventiDettaglioBeneInteressato'; column does not allow nulls. INSERT fails.
The statement has been terminated.
   at System.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection, Action`1 wrapCloseInAction)
   at System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection, Action`1 wrapCloseInAction)
   at System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj, Boolean callerHasConnectionLock, Boolean asyncClose)
   at System.Data.SqlClient.TdsParser.TryRun(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj, Boolean& dataReady)
   at System.Data.SqlClient.SqlCommand.FinishExecuteReader(SqlDataReader ds, RunBehavior runBehavior, String resetOptionsString)
   at System.Data.SqlClient.SqlCommand.RunExecuteReaderTds(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, Boolean async, Int32 timeout, Task& task, Boolean asyncWrite, SqlDataReader ds)
   at System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method, TaskCompletionSource`1 completion, Int32 timeout, Task& task, Boolean asyncWrite)
   at System.Data.SqlClient.SqlCommand.InternalExecuteNonQuery(TaskCompletionSource`1 completion, String methodName, Boolean sendToPipe, Int32 timeout, Boolean asyncWrite)
   at System.Data.SqlClient.SqlCommand.ExecuteNonQuery()
   at System.Data.SqlClient.SqlCommand.ExecuteBatchRPCCommand()
   at System.Data.SqlClient.SqlCommandSet.ExecuteNonQuery()
   at NHibernate.AdoNet.SqlClientSqlCommandSet.ExecuteNonQuery()
   at NHibernate.AdoNet.SqlClientBatchingBatcher.DoExecuteBatch(IDbCommand ps)
ClientConnectionId:b0edabca-f2b9-4cc5-95b8-120653b5dc31
18:15:26.012 [10] ERROR NHibernate.Util.ADOExceptionReporter - Cannot insert the value NULL into column 'CodiceEvento', table 'Evento.EventiDettaglioBeneInteressato'; column does not allow nulls. INSERT fails.
The statement has been terminated.
18:15:26.047 [10] ERROR NHibernate.Event.Default.AbstractFlushingEventListener - Could not synchronize database state with session
NHibernate.Exceptions.GenericADOException: could not execute batch command.[SQL: SQL not available] ---> System.Data.SqlClient.SqlException: Cannot insert the value NULL into column 'CodiceEvento', table 'Evento.EventiDettaglioBeneInteressato'; column does not allow nulls. INSERT fails.
The statement has been terminated.
   at System.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection, Action`1 wrapCloseInAction)
   at System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection, Action`1 wrapCloseInAction)
   at System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj, Boolean callerHasConnectionLock, Boolean asyncClose)
   at System.Data.SqlClient.TdsParser.TryRun(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj, Boolean& dataReady)
   at System.Data.SqlClient.SqlCommand.FinishExecuteReader(SqlDataReader ds, RunBehavior runBehavior, String resetOptionsString)
   at System.Data.SqlClient.SqlCommand.RunExecuteReaderTds(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, Boolean async, Int32 timeout, Task& task, Boolean asyncWrite, SqlDataReader ds)
   at System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method, TaskCompletionSource`1 completion, Int32 timeout, Task& task, Boolean asyncWrite)
   at System.Data.SqlClient.SqlCommand.InternalExecuteNonQuery(TaskCompletionSource`1 completion, String methodName, Boolean sendToPipe, Int32 timeout, Boolean asyncWrite)
   at System.Data.SqlClient.SqlCommand.ExecuteNonQuery()
   at System.Data.SqlClient.SqlCommand.ExecuteBatchRPCCommand()
   at System.Data.SqlClient.SqlCommandSet.ExecuteNonQuery()
   at NHibernate.AdoNet.SqlClientSqlCommandSet.ExecuteNonQuery()
   at NHibernate.AdoNet.SqlClientBatchingBatcher.DoExecuteBatch(IDbCommand ps)
   --- End of inner exception stack trace ---
   at NHibernate.AdoNet.SqlClientBatchingBatcher.DoExecuteBatch(IDbCommand ps)
   at NHibernate.AdoNet.AbstractBatcher.ExecuteBatchWithTiming(IDbCommand ps)
   at NHibernate.AdoNet.AbstractBatcher.ExecuteBatch()
   at NHibernate.Engine.ActionQueue.ExecuteActions(IList list)
   at NHibernate.Engine.ActionQueue.ExecuteActions()
   at NHibernate.Event.Default.AbstractFlushingEventListener.PerformExecutions(IEventSource session)

感谢。萨尔瓦多

Answer 1

首先，我在代码中看到了一些“文本”错误，但我认为这是一个简单的写错误;-) 按照您的问题处理订单，答案点是：

使用子对象的集合和级联，首先需要使用反向，因为这会告诉nhibernate首先保存根对象，然后分配root保存 - 要保存的每个子项的对象键。但这并不是使级联正常工作的唯一方法。
使用像你这样的子对象的双方引用集合，如果你有一个带有子节点的根，并且每个子节点都有对它的根的引用，那么直接在root中的子列表上工作就不那么好了。添加项目，因为当您添加子对象时，root有责任设置每个子根引用。要做到这一点，涉及的步骤是：
- 在IList<EventiDettaglioBeneInteressato>类中添加Eventi的私有字段，然后在构造函数中将其初始化为新的空集合
- 在Eventi课程内，将EventiDettaglio属性从IList<EventiDettaglioBeneInteressato>更改为IEnumerable<EventiDettaglioBeneInteressato>
- 在Eventi类中将属性从自动属性更改为只读属性public virtual IEnumerable<EventiDettaglioBeneInteressato> EventiDettaglio { get { return _eventiDettaglio; } }
- 在 Eventi 类映射中，将包 EventiDettaglio 的级联属性更改为cascade="all-delete-orphan"，然后指定包含nhibernate 将通过支持字段而不是属性来访问，这可以通过添加access="nosetter.camelcase-underscore"
- 毕竟，需要为Add类创建一个Eventi方法，将子 EventiDettaglioBeneInteressato 添加到该类中，该方法内部将设置引用父 - 孩子，你想做的事：public virtual void Add(EventiDettaglioBeneInteressato dettaglioBeneInteressato) { dettaglioBeneInteressato.Evento = this; _eventiDettaglio.Add(dettaglioBeneInteressato); }

这些是按照您的意愿工作的所有步骤，因此我修改过的测试是这样的（我假设使用NUnit作为testframework，而FluentAssertions作为帮助框架进行断言，但很容易就可以改变方法来使用MSTest）：

 [Test]
    public void TestMethod()
    {
        var session = SessionFactory.OpenSession();
        var codiceEvento = "20140630_013325_BA";

        //Step1. Create a new Eventi to be saved with the given code

        using (var trx = session.BeginTransaction())
        {
            var eventi = new Eventi
            {
                CodiceEvento = codiceEvento
            };
            session.SaveOrUpdate(eventi);
            trx.Commit();
        }

        //Step2. Clear the session so the Eventi object have to be loaded again
        session.Clear();
        using (var trx = session.BeginTransaction())
        {
            var evento = session.Get<Eventi>(codiceEvento);

            //assert the object has no child yet
            evento.EventiDettaglio.Count().Should().Be(0);

            //Step3. Add objects without specify the relationship
            evento.Add(new EventiDettaglioBeneInteressato
            {
                PrgOrdinamento = 1,
                CodiceTipoBeneRFI = 1
            });

            evento.Add(new EventiDettaglioBeneInteressato
            {
                PrgOrdinamento = 2,
                CodiceTipoBeneRFI = 2
            });
            evento.Add(new EventiDettaglioBeneInteressato
            {
                PrgOrdinamento = 3,
                CodiceTipoBeneRFI = 3
            });
            evento.Add(new EventiDettaglioBeneInteressato
            {
                PrgOrdinamento = 4,
                CodiceTipoBeneRFI = 4
            });

            //Step4. save the root and then check if all the collection is saved
            session.SaveOrUpdate(evento);
            trx.Commit();
        }

        //Step5. clear again the session to make sure all the things are loaded well from db
        session.Clear();
        using (var trx = session.BeginTransaction())
        {
            var evento = session.Get<Eventi>(codiceEvento);

            //Step6. load the root and then assert the child collection has 4 elements
            evento.EventiDettaglio.Count().Should().Be(4);

            //Step7. delete the root object to repeat the test again and test the cascade
            session.Delete(evento);
            trx.Commit();
        }

        //Step8. check there's no child object for that codiceEvento. the cascade is working!
        using (var trx = session.BeginTransaction())
        {
            session.Query<EventiDettaglioBeneInteressato>()
                .Count(it => it.Evento.CodiceEvento == codiceEvento)
                .Should().Be(0);

            trx.Commit();
        }

    }

只是为了有用，这是修改后的类和映射（修改为在你的环境之外工作）：

Eventi class

    [Serializable]
public class Eventi
{
    private IList<EventiDettaglioBeneInteressato> _eventiDettaglio; 
    public Eventi()
    {
        _eventiDettaglio = new List<EventiDettaglioBeneInteressato>();
    }

    public virtual string CodiceEvento { get; set; }
    public virtual string DescrizioneEvento { get; set; }

    public virtual short CodiceTipoEvento { get; set; }
    public virtual short? CodiceTipoAltroEvento { get; set; }
    public virtual byte CodiceTipoClasseEvento { get; set; }
    public virtual byte? CodiceTipoCausaEvento { get; set; }
    public virtual byte CodiceTipoStatoSchedaEvento { get; set; }
    public virtual int? CodiceGestoreAsset { get; set; }
    public virtual byte? CodiceTipoOraEvento { get; set; }
    public virtual short? CodiceTipoAutoreEvento { get; set; }
    public virtual short? CodiceTipoSegnalazioneEvento { get; set; }       

    public virtual IEnumerable<EventiDettaglioBeneInteressato> EventiDettaglio { get { return _eventiDettaglio; } }

    public virtual void Add(EventiDettaglioBeneInteressato dettaglioBeneInteressato)
    {
        dettaglioBeneInteressato.Evento = this;
        _eventiDettaglio.Add(dettaglioBeneInteressato);
    }

    #region NHibernate Composite Key Requirements
    public override bool Equals(object obj)
    {
        if (obj == null) return false;
        var t = obj as Eventi;
        if (t == null) return false;
        if (CodiceEvento == t.CodiceEvento)
            return true;

        return false;
    }
    public override int GetHashCode()
    {
        int hash = GetType().GetHashCode();
        hash = (hash * 397) ^ CodiceEvento.GetHashCode();

        return hash;
    }
    #endregion
}

Eventi类映射

<hibernate-mapping assembly="MyOverFlow.Tests" namespace="MyOverFlow.Tests.NHibernate.Domain" xmlns="urn:nhibernate-mapping-2.2">
  <class name="Eventi" table="Eventi" lazy="true" schema="Evento">
    <id name="CodiceEvento" column="CodiceEvento" />

    <property name="CodiceTipoEvento" >
      <column name="CodiceTipoEvento" sql-type="smallint" not-null="true" />
    </property>

    <property name="CodiceTipoAltroEvento" >
      <column name="CodiceTipoAltroEvento" sql-type="smallint" not-null="false" />
    </property>

    <property name="CodiceTipoClasseEvento">
      <column name="CodiceTipoClasseEvento" sql-type="tinyint" not-null="true" />
    </property>

    <property name="CodiceTipoCausaEvento" >
      <column name="CodiceTipoCausaEvento" sql-type="tinyint" />
    </property>

    <property name="CodiceTipoStatoSchedaEvento">
      <column name="CodiceTipoStatoSchedaEvento" sql-type="tinyint" not-null="true" />
    </property>

    <property name="CodiceGestoreAsset">
      <column name="CodiceGestoreAsset" sql-type="int" not-null="false" />
    </property>

    <property name="CodiceTipoOraEvento">
      <column name="CodiceTipoOraEvento" sql-type="tinyint" not-null="false" />
    </property>

    <property name="CodiceTipoAutoreEvento">
      <column name="CodiceTipoAutoreEvento" sql-type="smallint" not-null="false" />
    </property>

    <property name="CodiceTipoSegnalazioneEvento">
      <column name="CodiceTipoSegnalazioneEvento" sql-type="smallint" not-null="false" />
    </property>

    <property name="DescrizioneEvento">
      <column name="DescrizioneEvento" sql-type="varchar" not-null="false" />
    </property>

    <bag name="EventiDettaglio" table="EventiDettaglioBeneInteressato"
         access="nosetter.camelcase-underscore"
         schema="Evento" inverse="true" cascade="all-delete-orphan" >
      <key column="CodiceEvento" />
      <one-to-many class="EventiDettaglioBeneInteressato" />
    </bag>

  </class>
</hibernate-mapping>

希望这有帮助！

例外NHibernate Composite-ID子级联

1 个答案: