Question

背景：http://docs.orchardproject.net/Documentation/Creating-1-n-and-n-n-relations

以下是曲目部分的模型：

    public class TrackPartRecord : ContentPartRecord
    {
        public virtual IList<TrackInformationRecord> Tracks { get; set; }
    }

    public class TrackPart : ContentPart<TrackPartRecord>
    {
        public IList<TrackInformationRecord> Tracks
        {
            get { return Record.Tracks; }
        }
    }

    public class TrackInformationRecord
    {
        public virtual int Id { get; set; }
        public virtual int TrackPartId { get; set; }
        public virtual string Title { get; set; }
        public virtual string Description { get; set; }
        public virtual bool IsDeleted { get; set; }

        public virtual IList<SessionInformationRecord> Sessions { get; set; }
   }

    public class SessionInformationRecord
    {
        public virtual int Id { get; set; }
        public virtual int TrackId { get; set; }
        public virtual string Title { get; set; }
        public virtual string Description { get; set; }
        public virtual DateTime Timeslot { get; set; }
        public virtual bool HasEvaluation { get; set; }
        public virtual bool IsDeleted { get; set; }
    }

这是我的迁移来创建3个表（2个信息记录和1个部分记录）：

    // Creating table TrackInformationRecord
    SchemaBuilder.CreateTable("TrackInformationRecord", table => table
        .Column("Id", DbType.Int32, column => column.PrimaryKey().Identity())
        .Column("TrackPartId", DbType.Int32)
        .Column("Title", DbType.String)
        .Column("Description", DbType.String)
        .Column("IsDeleted", DbType.Boolean)
    );

    // Creating table TrackPartRecord
    SchemaBuilder.CreateTable("TrackPartRecord", table => table
        .ContentPartRecord()
    );

    ContentDefinitionManager.AlterPartDefinition("TrackPart", builder => builder.Attachable());

    // Creating table SessionInformationRecord
    SchemaBuilder.CreateTable("SessionInformationRecord", table => table
        .Column("Id", DbType.Int32, column => column.PrimaryKey().Identity())
        .Column("TrackId", DbType.Int32)
        .Column("Title", DbType.String)
        .Column("Description", DbType.String)
        .Column("Timeslot", DbType.DateTime)
        .Column("HasEvaluation", DbType.Boolean)
        .Column("IsDeleted", DbType.Boolean)
    );

内容项附加跟踪部分（形成1-n关系），跟踪记录包含会话记录列表。

添加曲目时问题就开始了。添加的第一首曲目已添加。在第一次更新（添加第一首曲目，还没有会话）之后，我无法再更新内容项上的任何内容。当我查看代码时，我没有得到任何错误或任何异常（也许它们在Orchard中被埋得太深，没有任何直接明显的东西被抛出）。

当我直接访问数据库并删除与内容项相关的跟踪记录时，我可以再次更新所有内容。

我检查了日志，发现了这个：

2013-08-14 14:15:00,882 [30] NHibernate.AdoNet.AbstractBatcher - Could not execute command: UPDATE Ignite_EventsAgenda_SessionInformationRecord SET TrackInformationRecord_id = null WHERE TrackInformationRecord_id = @p0
System.Data.SqlServerCe.SqlCeException (0x80004005): The column name is not valid. [ Node name (if any) = ,Column name = TrackInformationRecord_id ]
   at System.Data.SqlServerCe.SqlCeCommand.ProcessResults(Int32 hr)
   at System.Data.SqlServerCe.SqlCeCommand.CompileQueryPlan()
   at System.Data.SqlServerCe.SqlCeCommand.ExecuteCommand(CommandBehavior behavior, String method, ResultSetOptions options)
   at System.Data.SqlServerCe.SqlCeCommand.ExecuteNonQuery()
   at NHibernate.AdoNet.AbstractBatcher.ExecuteNonQuery(IDbCommand cmd)
2013-08-14 14:15:00,888 [30] NHibernate.Util.ADOExceptionReporter - System.Data.SqlServerCe.SqlCeException (0x80004005): The column name is not valid. [ Node name (if any) = ,Column name = TrackInformationRecord_id ]
   at System.Data.SqlServerCe.SqlCeCommand.ProcessResults(Int32 hr)
   at System.Data.SqlServerCe.SqlCeCommand.CompileQueryPlan()
   at System.Data.SqlServerCe.SqlCeCommand.ExecuteCommand(CommandBehavior behavior, String method, ResultSetOptions options)
   at System.Data.SqlServerCe.SqlCeCommand.ExecuteNonQuery()
   at NHibernate.AdoNet.AbstractBatcher.ExecuteNonQuery(IDbCommand cmd)
   at NHibernate.Persister.Collection.AbstractCollectionPersister.Remove(Object id, ISessionImplementor session)
2013-08-14 14:15:00,891 [30] NHibernate.Util.ADOExceptionReporter - The column name is not valid. [ Node name (if any) = ,Column name = TrackInformationRecord_id ]
2013-08-14 14:15:00,894 [30] NHibernate.Event.Default.AbstractFlushingEventListener - Could not synchronize database state with session
NHibernate.Exceptions.GenericADOException: could not delete collection: [Ignite.EventsAgenda.Models.TrackInformationRecord.Sessions#1][SQL: UPDATE Ignite_EventsAgenda_SessionInformationRecord SET TrackInformationRecord_id = null WHERE TrackInformationRecord_id = @p0] ---> System.Data.SqlServerCe.SqlCeException: The column name is not valid. [ Node name (if any) = ,Column name = TrackInformationRecord_id ]

首先，我不知道为什么我的“列名无效”问题。

其次，我没有得到这一行：UPDATE Ignite_EventsAgenda_SessionInformationRecord SET TrackInformationRecord_id = null WHERE TrackInformationRecord_id = @ p0

它在哪里获得列名TrackInformationRecord_id？

任何帮助或建议都将受到高度赞赏。

Answer 1

是的，应该用斜杠命名，类型可以是记录类名而不是int。您还应将Datetime设置为nullable：Datetime？

Answer 2

请你这样试试（为了简单起见，我省略了Session，但你可以复制它）：

public class TrackPartRecord : ContentPartRecord
{
    public virtual IList<TrackInformationRecord> Tracks { get; set; }
}

public class TrackInformationRecord
{
    // Own properties
    public virtual int Id { get; set; }
    public virtual string Title { get; set; }
    public virtual string Description { get; set; }
    public virtual bool IsDeleted { get; set; }

    // Relations properties
    public virtual TrackPartRecord TrackPartRecord { get; set; }
}

在迁移中：

        SchemaBuilder.CreateTable("TrackPartRecord", t => t
            .ContentPartRecord()
            );

        SchemaBuilder.CreateTable("TrackInformationRecord", t => t
            .Column<int>("Id", column => column.PrimaryKey().NotNull())
            .Column<int>("TrackPartRecord_Id")
            .Column<string>("Title", c => c.WithLength(50).NotNull())
            .Column<string>("Description", c => c.NotNull())
            .Column<bool>("IsDeleted")
           );

Answer 3

public class TrackInformationRecord
{
    public virtual IList<SessionInformationRecord> Sessions { get; set; }
}

...说父母TrackInformationRecord有很多孩子Sessions。我猜测Orchard使用Fluent NHibernate的自动映射来生成NHibernate映射。 FluentNH的一对多关系的默认列名是{classNameOfParent}_id。因此TrackInformationRecord_id，因而错误 - 您从未创建具有该名称的列。

我对Orchard不熟悉，所以我不知道它是否提供了一种自定义此行为的方法。 FluentNH提供了一种方式（https://github.com/jagregory/fluent-nhibernate/wiki/Auto-mapping#overrides），但是Orchard是否向您公开了该功能，我不知道。如果你找到一个放置映射覆盖的地方，那么这样的东西应该可以工作：

public class TrackInformationRecordOverride
    : IAutoMappingOverride<TrackInformationRecord>
{
    public void Override(AutoMapping<TrackInformationRecord> mapping)
    {
        mapping.HasMany(x => x.Sessions)
            .KeyColumn("TrackId"); // ... assuming TrackId is the column you wanted.
    }
}

果园1-N关系（停止更新内容项）

3 个答案: