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我已经用 NHibernate3 声明了休闲映射：

使用 FluentNHibernate

public class ActivityMap : ClassMap<Activity> {
    public ActivityMap() {
        this.Table("Activity");
        this.Cache.ReadWrite();
        this.Version(x => x.ObjectVersion);
        this.Id(x => x.Id).GeneratedBy.Assigned();

        // snipp

        this.HasOne(x => x.AppointmentRecurrence).Cascade.Delete();
    }
}

public class AppointmentRecurrenceMap : ClassMap<AppointmentRecurrence> {
    public AppointmentRecurrenceMap() {
        this.Table("AppointmentRecurrence");
        this.Cache.ReadWrite();     
        this.Version(x => x.ObjectVersion);
        this.Id(x => x.Id).GeneratedBy.Foreign("Activity");

        // snipp

        this.HasOne(x => x.Activity).Constrained();
    }
}

它正在生成闲置的 hbm 映射：

<hibernate-mapping xmlns="urn:nhibernate-mapping-2.2">
  <class xmlns="urn:nhibernate-mapping-2.2" lazy="false" name="Prayon.Entities.Activity, Prayon.Entities, Version=1.0.0.867, Culture=neutral, PublicKeyToken=null" table="Activity">
    <cache usage="read-write" />
    <id name="Id" type="System.Guid, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089">
      <column name="Id" />
      <generator class="assigned" />
    </id>
    <!-- snipp -->
    <one-to-one cascade="delete" class="Prayon.Entities.AppointmentRecurrence, Prayon.Entities, Version=1.0.0.867, Culture=neutral, PublicKeyToken=null" foreign-key="FK_Activity_AppointmentRecurrence" name="AppointmentRecurrence" />
  </class>
</hibernate-mapping>


<hibernate-mapping xmlns="urn:nhibernate-mapping-2.2">
  <class xmlns="urn:nhibernate-mapping-2.2" lazy="false" name="Prayon.Entities.AppointmentRecurrence, Prayon.Entities, Version=1.0.0.867, Culture=neutral, PublicKeyToken=null" table="AppointmentRecurrence">
    <cache usage="read-write" />
    <id name="Id" type="System.Guid, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089">
      <column name="Id" />
      <generator class="foreign">
        <param name="property">Activity</param>
      </generator>
    </id>
    <!-- snipp -->
   <one-to-one class="Prayon.Entities.Activity, Prayon.Entities, Version=1.0.0.867, Culture=neutral, PublicKeyToken=null" constrained="true" foreign-key="FK_AppointmentRecurrence_Activity" name="Activity" />
  </class>
</hibernate-mapping>

现在，当我选择活动（带有可缓存选择）时，我在 NHibernate-Profiler 中看到，NHibernate 正在从二级缓存中正确获取每个活动，但它会为每个活动选择 AppointmentReccurrence。我该怎么办，它也会从缓存中获取 AppointmentRecurrence ？我曾尝试在一对一关系上设置缓存属性，但似乎不受支持。

4

1 回答 1

0

Constrained您的映射方面似乎确实存在问题。根据 Ayende 的一对一指南：

还有一点需要注意的是我们必须用foreign-key=”none”来指定它，因为否则NHibernate的Schema Export特性会为我们创建两个外键，这会创建一个循环引用，不允许我们插入任何东西到数据库。

显然 FK实际上并不存在于您的数据库中，但错误配置可能会导致缓存出现问题：

foreign-key="none"Fluent中指定的方式：

this.HasOne(x => x.Activity).Constrained().ForeignKey();
于 2012-10-20T03:05:19.907 回答