我知道这已被多次询问和回答,但我有两个多对多的课程。我用袋子互相映射它们。这是NHibernate映射:
日历:
<?xml version="1.0" encoding="utf-8"?>
<!--Generated by NHibernate.Mapping.Attributes on 2009-10-09 18:09:29Z.-->
<hibernate-mapping xmlns="urn:nhibernate-mapping-2.2">
<class name="Calendar.Calendar, Calendar" table="Calendars">
<id name="CalendarId" column="CalendarId" type="Int32">
<generator class="native" />
</id>
<property name="Name" length="100" />
<property name="CalendarStatus" />
<property name="CalendarType" type="Calendar.GenericEnumMapper`1[[Calendar.CalendarType, Calendar, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]], Calendar" length="50" />
<property name="RecordCreatedBy" column="CreatedBy" length="50" />
<property name="RecordModifiedBy" column="ModifiedBy" length="50" />
<property name="CreateDate" />
<property name="ModifiedDate" />
<bag name="Events" table="CalendarEventsInCalendar" cascade="all">
<key column="CalendarId" />
<many-to-many class="Calendar.CalendarEvent, Calendar" column="CalendarEventId" />
</bag>
</class>
</hibernate-mapping>
CalendarEvent:
<?xml version="1.0" encoding="utf-8"?>
<!--Generated by NHibernate.Mapping.Attributes on 2009-10-09 18:27:46Z.-->
<hibernate-mapping xmlns="urn:nhibernate-mapping-2.2">
<class name="Calendar.CalendarEvent, Calendar" table="CalendarEvents">
<id name="CalendarEventId" column="CalendarEventId" type="Int32">
<generator class="native" />
</id>
<property name="EventStatus" />
<property name="StartTime" />
<property name="EndTime" />
<property name="ImageUrl" length="255" />
<property name="Description" length="2000" />
<property name="LocationName" length="255" />
<property name="Address1" length="255" />
<property name="Address2" length="255" />
<property name="City" length="255" />
<property name="State" length="255" />
<property name="Zip" length="10" />
<property name="Title" length="255" />
<property name="Url" length="255" />
<property name="ExternalSystemId" />
<property name="ExternalSystem" type="Calendar.GenericEnumMapper`1[[Calendar.ExternalSystemType, Calendar, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]], Calendar" length="50" />
<property name="RecordCreatedBy" column="CreatedBy" length="50" />
<property name="RecordModifiedBy" column="ModifiedBy" length="50" />
<property name="CreateDate" />
<property name="ModifiedDate" />
<many-to-one name="ParentEvent" column="ParentEventId" />
<bag name="ChildEvents" lazy="true" fetch="subselect" cascade="all" inverse="true">
<key column="ParentEventId" />
<one-to-many class="Calendar.CalendarEvent, Calendar" />
</bag>
<bag name="Calendars" table="CalendarEventsInCalendar" lazy="false" inverse="true">
<key column="CalendarEventId" />
<many-to-many class="Calendar.Calendar, Calendar" column="CalendarId" />
</bag>
</class>
</hibernate-mapping>
以下是我如何向日历添加活动:
public virtual void AddEvent(CalendarEvent calEvent)
{
if(!calEvent.Calendars.Contains(this))
calEvent.Calendars.Add(this);
Events.Add(calEvent);
}
然后我做了SaveOrUpdate(日历)
有什么想法吗?
答案 0 :(得分:4)
您必须将SaveOrUpdate包装在事务中,然后执行Transaction.Commit()。否则,映射不会仅保存实体。
谢谢, 杰森
答案 1 :(得分:0)
我认为问题出现在CalendarEvent的inverse=true
中。你应该删除它