Re: nested contexts

From: Aristedes Maniatis (ar..sh.com.au)
Date: Tue Jan 13 2009 - 06:26:08 EST

  • Next message: Andrus Adamchik: "Re: nested contexts"

    On 13/01/2009, at 7:03 PM, Andrus Adamchik wrote:

    >> Another thing is that the http://cayenne.apache.org/doc/nested-datacontexts.html
    >> states that nested contexts are not available in ROP, is that still?
    >
    > Andrey has been working on the ROP version of nested contexts. I
    > think it is (partially?) done.
    >
    > Andrus

    If I can answer on his behalf, Marcin is testing that right now, hence
    the questions. I've updated the web site page to reflect that nested
    contexts are now available.

    >> I think it is a bug, and relating objects should be allowed between
    >> parent/child contexts.
    >
    > Not so. Parent/child relationship determines the path of the select
    > and commit operations, but has no effect on the rule that each
    > object belongs to just one context, and no relationships between
    > them are possible.

    That's a little awkward then. If a user is in the middle of creating a
    new Artist and decides to create a Painting (in a child context), then
    it is troublesome to create the join. We can't move the Artist into
    the child context so that it can be joined there to the Painting, so I
    assume the only solution is to postpone the join until the child
    context is committed back to its parent. But that is awkward since
    while in the child editing context, the Painting has no access to the
    Artist it should be related to.

    Ari

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