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Prevent delete if child has value?

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    Prevent delete if child has value?

    Hi All,

    Please can you advise on what is the best way to prevent a parent record being deleted if it has a child record.
    Regards
    Keith Hubert
    Alpha Guild Member
    London.
    KHDB Management Systems
    Skype = keith.hubert


    For your day-to-day Needs, you Need an Alpha Database!

    #2
    Re: Prevent delete if child has value?

    Hi Keith,

    Create a custom UDF for your delete process. Check for child records, if there are any, provide the user with a message box or the like: Sorry, but this record has other data attached to it so it cannot be deleted. Then end your script so that the delete does not happen.

    You could also add to this: inform the user that there are attached data records, if they delete this record, then all attached data will also be deleted. Request confirmation, if they want to proceed, delete all the child records first, and then proceed with the deletion of the parent.

    I don't know if this 'is the best way', but it is a way :)
    Last edited by Cheryl Lemire; 12-11-2007, 08:16 AM. Reason: typo
    Cheryl
    #1 Designs By Pagecrazy
    http://pagecrazy.com/

    Comment


      #3
      Re: Prevent delete if child has value?

      Since every child record must have a field corresponding to a linking key field in the parent,The child record must have an index tag for that field. Let's say we have an order# in the parent record the child record is indexed on its order# field.
      So you can have a can delete record field rule on the parent record like
      .not.exist(lchildrecord info)

      Comment


        #4
        Re: Prevent delete if child has value?

        Just be aware that if the parent record is in a browse and the user selects more than one row and then presses "Ctrl+D" the records will be deleted without your script running.

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