deleting tomany objects

From: Mark Fraser (
Date: Wed Oct 21 2009 - 03:37:42 EDT

  • Next message: Andrus Adamchik: "Re: deleting tomany objects"


    I am using Cayenned 2.0.4.

    What is the proper way to delete the full collection of tomany objects
    and have the target object's array correctly reflect the deletion?

    The manual ( says
    to use dataContext.deleteObjects if you want to delete all objects in
    the collection.

    What it does not say is that the target object's array will still
    contain references to objects that are scheduled for deletion (or have
    been deleted after committal).

    I have code like this:

     System.out.println("paintings: " + artist.getPaintingsArray().size());
    // "1"
     System.out.println("paintings: " + artist.getPaintingsArray().size());
    // "1"
    System.out.println("paintings: " + artist.getPaintingsArray().size());
    // "1"

    But if I try to delete the objects myself using an iterator as described
    on that manual page I get a ConcurrencyModificationException--which is
    warned about on that page. It says this may result from the object
    being deleted having a "nullify delete rule". However in the modeler
    the delete rule for both sides of the relationship is "No Action".

    I would appreciate if someone could suggest how I am supposed to do this
    (without switching Cayenne versions).



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