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Automatic Deletion of Parent Node Upon Deletion of Last Child

Francisco_Alcala-Soler_(iaea_001user3_-_(deleted))

I am trying to delete a folder node when its last child node is deleted. What would be the recommended way to do this? (Livelink 9.1 on Win2K).The folder will contain only some newly created node type, so I check on this child node type's LLNode.NodeDeleteSubclassPre() if the parent folder should be deleted as well, store this info in local features and attempt the deletion in LLNode.NodeDeleteSubclassPost().At this time Builder always crashes.How can I accomplish this?Thanks, Curro

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eLink User

Message from Jonny Coombes <<A HREF="mailto:jcoombes@opentext.com">jcoombes@opentext.com> via eLink

eLink

You might want to tryusing a NodeCallback instead of the subclass methods…

Jonathan Coombes Bsc(Hons)

Senior Technical Architect

Open Text Professional Services

Tel : +44(0) 7748 986937

Email : jcoombes@opentext.com

-----Original Message-----
From: eLink Discussion:Development Discussion [mailto:development@elinkkc.opentext.com]
Sent: 19 July 2002 09:46
To: eLink Recipient
Subject: Automatic Deletion ofParent Node Upon Deletion of Last Child

Automatic Deletion of Parent Node Upon Deletion of Last Child

Posted by IAEA_001User3 (Alcala-Soler, Francisco J) on 07/19/2002 04:42 AM

I am trying to delete a folder node when its last child node is deleted. What would be the recommended way to do this? (Livelink 9.1 on Win2K).

The folder will contain only some newly created node type, so I check on this child node type's LLNode.NodeDeleteSubclassPre() if the parent folder should be deleted as well, store this info in local features and attempt the deletion in LLNode.NodeDeleteSubclassPost().

At this time Builder always crashes.

How can I accomplish this?

Thanks,

Curro

eLink User

Message from chris meyer via eLinkCurro,You may need to commit the deletion of the child item first. I imagine youdeadlock the db by trying to delete the parent before the child deletion iscommitted. chris-----Christopher MeyerProfessional Services----- Original Message -----From: "eLink Discussion: Development Discussion"To: "eLink Recipient" Sent: Friday, July 19, 2002 10:45 AMSubject: Automatic Deletion of Parent Node Upon Deletion of Last Child> Automatic Deletion of Parent Node Upon Deletion of Last Child> Posted by IAEA_001User3 on 07/19/2002 04:42 AM>> I am trying to delete a folder node when its last child node is deleted.What would be the recommended way to do this? (Livelink 9.1 on Win2K).>> The folder will contain only some newly created node type, so I check onthis child node type's LLNode.NodeDeleteSubclassPre() if the parent foldershould be deleted as well, store this info in local features and attempt thedeletion in LLNode.NodeDeleteSubclassPost().>> At this time Builder always crashes.>> How can I accomplish this?>> Thanks,>> Curro>> [To reply to this thread, use your normal e-mail reply function.]>> ============================================================>> Discussion: Development Discussion>https://knowledge.opentext.com/knowledge/livelink.exe?func=ll&objId=786303&objAction=view>> Livelink Server:> https://knowledge.opentext.com/knowledge/livelink.exe>>>

eLink User

Message from Hans Stoop <<A HREF="mailto:hstoop@opentext.com">hstoop@opentext.com> via eLink

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The best way is to set as the response.location the URL to delete the parent. This is done in the action-delete script. Default it is set to browse the parent.

Hans

--------
Livelink Appearance: the best way to skin Livelink.
Contact hstoop@opentext.com for more information.

-----Original Message-----
From: eLink Discussion: Development Discussion [mailto:development@elinkkc.opentext.com]
Sent: vrijdag 19 juli 2002 10:46
To: eLink Recipient
Subject: Automatic Deletion of Parent Node Upon Deletion of Last Child

Automatic Deletion of Parent Node Upon Deletion of Last Child Posted by IAEA_001User3 (Alcala-Soler, Francisco J) on 07/19/2002 04:42 AM

I am trying to delete a folder node when its last child node is deleted. What would be the recommended way to do this? (Livelink 9.1 on Win2K).

The folder will contain only some newly created node type, so I check on this child node type's LLNode.NodeDeleteSubclassPre() if the parent folder should be deleted as well, store this info in local features and attempt the deletion in LLNode.NodeDeleteSubclassPost().

At this time Builder always crashes.

How can I accomplish this?

Thanks,

Curro

Francisco_Alcala-Soler_(iaea_001user3_-_(deleted))

Thanks, Hans. I thought about WebNode action scripts, but I need this solution to work from LAPI as well. Curro

Francisco_Alcala-Soler_(iaea_001user3_-_(deleted))

Thanks, Christopher.How would I go about committing the deletion of the child from its own NodeDeleteSubclassPost() function. Can it be done from there? Curro

Francisco_Alcala-Soler_(iaea_001user3_-_(deleted))

Hi Jonathan,I had tried with CBNodeDeleteSubclass() within my node type. This function is called by CBNodeDelete, which also happens to call NodeCallbacks.CBDelete(), but apparently they are all called before deleting the child node itself, so I don't know how I could implement the deletion of its parent from there.Is this what you were referring to?Thanks, Curro

eLink User

Message from chris meyer via eLinkOne way is to issue the following command...CAPI.RestartTransaction(Session.fDbConnect.fConnection, CAPI.COMMIT)with, of course, the appropriate parameters. However, I much prefer Hans'approach of a redirect. cheers, chris----- Original Message -----From: "eLink Discussion: Development Discussion"To: "eLink Recipient" Sent: Friday, July 19, 2002 11:32 AMSubject: Re Automatic Deletion of Parent Node Upon Deletion of Last Child> Re Automatic Deletion of Parent Node Upon Deletion of Last Child> Posted by IAEA_001User3 on 07/19/2002 05:22 AM>> Thanks, Christopher.>> How would I go about committing the deletion of the child from its ownNodeDeleteSubclassPost() function. Can it be done from there?>> Curro>> [To reply to this thread, use your normal e-mail reply function.]>> ============================================================>> Topic: Automatic Deletion of Parent Node Upon Deletion of Last Child>https://knowledge.opentext.com/knowledge/livelink.exe?func=ll&objId=2793015&objAction=view>> Discussion: Development Discussion>https://knowledge.opentext.com/knowledge/livelink.exe?func=ll&objId=786303&objAction=view>> Livelink Server:> https://knowledge.opentext.com/knowledge/livelink.exe>>>

Martin_Gäckler

Curro,perhaps you should send some example code how you did implement your checks and deletions. Regarding your information you have posted until now, it should be working.NodeDeleteSubclassPost is called after NODE.Delete and therefore your deletion of the folder should not "see" the last child currently deleted thus you do not need to commit the deletion to avoid an endless recursion. (This is true for an Oracle database and I do not know which DB you are using, maybe, your SQL Server behaves different.)I would suggest to enable all loggings especially SQL logging and to debug your source code using the Builder's debugger. Check what is the last line executed by the Oscript interpreter before the crash and check connect0.log (this is the Builder's SQL logfile) to see which sql commands have been sent to your DB and which records where returned by the DB.Hope this helpsMartin