我继承了这段代码，之前从未使用过Nhibernate。当我到达以下代码行时，我将收到级联错误（从关联中删除已删除的对象）错误，将重新保存已删除的对象： FactoryTools.AimsFactory.Update（CurProject）;
我已经尝试了其他一些帖子的内容，但没有任何效果。
public void DeleteProjectActivity(long? pId, bool pIsDeletionFromActivityList)
{
//**7-Jul-2016
//**From AIMS ProjectView.aspx.cs - grdActvity_RowDeleting()
//************************************************************
if (CurProject == null) //**Retrieve the current project
{
CurProject = AimsHelper.ProjectById(ProjectId);
if (CurProject == null) //**Invalid project
{
return;
}
}
var activity =
CurProject.Activities.FirstOrDefault(x => x.Id == pId); //**Retrieve the activity based on the id received
if (activity == null) //**Activity not found - try the activity log directly
{
activity = AimsHelper.ActivityLogById(pId);
if (activity == null) //**Invalid activity id
{
return;
}
}
CurProject.Facility.UpdatedDate = DateTime.Now.Date;
if (activity.Type.Code == ActivityType.FINAL_DETERMINATION)
{
RemoveDeadlineToContestActivity(); //**Remove the DeadlineToContest activity if final action is permit issued
CurProject.Activities.Remove(activity); //**Remove the activity from the project
}
var publicComment = new PublicCommentPeriod();
if (CurProject.PublicCommentPeriods.Count > 0) //**Retrieve the current public comment -> if it exists
{
publicComment = CurProject.PublicCommentPeriods[0];
}
//** An ActivityList delete was clicked; both the public comment form data and the ActivityList needs updated
//** This really should be refactored into a usable method
//** Request via Trello card for PC Period & Opportunity to be treated independently.
if (pIsDeletionFromActivityList)
{
if (activity.Type.Id != null)
{
var activityId = (Int32)activity.Type.Id;
switch (activityId)
{
case 6:
PublicCommentOpportunityCommentPeriodRequested = false;
PublicCommentOpportunityCommentsReceived = false;
PublicCommentOpportunityStart = null;
PublicCommentOpportunityEnd = null;
//publicComment.Activity.Type.Id = null;
CurProject.PublicCommentPeriods[0].Opportunity = null;
publicComment.IsRequested = false;
publicComment.AreOpportunityCommentsReceived = false;
break;
case 7:
//** Clear view entries
PublicCommentCommentsReceived = false;
PublicCommentHearingRequested = false;
PublicCommentStart = null;
PublicCommentEnd = null;
PublicCommentDocketNumber = string.Empty;
//** Clear db values
publicComment.AreCommentsReceived = false;
publicComment.IsHearingRequested = false;
CurProject.PublicCommentPeriods[0].DocketNumber = string.Empty;
//publicComment.Activity.Type.Id = null;
CurProject.PublicCommentPeriods[0].Activity = null;
break;
case 9:
if (CurProject.PublicCommentPeriods[0].Hearing != null)
{
CurProject.PublicCommentPeriods[0].Hearing = null;
}
break;
case 10:
CurProject.PublicCommentPeriods[0].DeadlineToContest = null;
break;
case 31:
UpdateVersion(CurProject);
break;
case 32:
UpdateVersion(CurProject);
break;
default:
break;
}
}
if (publicComment.Hearing != null)
{
PublicCommentHearingLocation = string.Empty;
PublicCommentHearingDate = null;
}
}
activity.Project = null;
activity.Type = null;
//var activityChildren = activity.Children.Count;
//if (activityChildren > 0)
//{
// activity.Children.Remove();
//}
CurProject.Activities.Remove(activity);
FactoryTools.AimsFactory.Update(CurProject); //**Update changes to the project
}
这里是映射。抱歉，直到现在我才知道这个文件。
<hibernate-mapping xmlns="urn:nhibernate-mapping-2.2"
assembly="gov.idaho.deq.air.aims.dbms" namespace="gov.idaho.deq.air.aims.dbms" >
<class name="ActivityLog" table="D_ACTIVITY_LOG">
<id name="Id">
<generator class="identity"/>
</id>
<property name="Description"/>
<property name="ScheduledStartDate" column="SCHEDULED_START_DATE"/>
<property name="ActualStartDate" column="ACTUAL_START_DATE"/>
<property name="ScheduledEndDate" column="SCHEDULED_END_DATE"/>
<property name="ActualEndDate" column="ACTUAL_END_DATE"/>
<many-to-one name="Type" column="L_ACTIVITY_TYPE_ID" class="ActivityType"/>
<many-to-one name="Parent" class="ActivityLog"/>
<bag name="Children" table="D_ACTIVITY_LOG" cascade="all-delete-orphan" lazy="true">
<key column="PARENT"/>
<one-to-many class="ActivityLog"/>
</bag>
<bag name="Projects" table="D_PROJECT_ACTIVITY" lazy="true" cascade="all-delete-orphan">
<key column="D_ACTIVITY_LOG_ID"/>
<many-to-many class="Project" column="D_PROJECT_ID"/>
</bag>
<bag name="Comments" table="D_ACTIVITY_LOG_COMMENT" cascade="all-delete-orphan" inverse="true" lazy="true">
<key column="D_ACTIVITY_LOG_ID"/>
<one-to-many class="ActivityLogComment"/>
</bag>
<!-- <bag name="FacilityInspections" table="D_FACILITY_INSPECTION_ACTIVITY" lazy="true">
<key column="D_ACTIVITY_LOG_ID"/>
<many-to-many class="FacilityInspection" column="D_FACILITY_INSPECTION_ID"/>
</bag> -->
</class>
<!-- ActivityLog -->
</hibernate-mapping>
答案 0 :(得分：0)
问题在于在CurProject对象中的多个级别都引用了Activity对象。我必须遍历每个引用并将其删除。