Re: How to create Meaningful Primary Keys?

From: Pierre Lavignotte (pierre.lavignott..mail.com)
Date: Mon Feb 02 2009 - 06:49:27 EST

  • Next message: Alessio Giovanni Baroni: "Re: How to create Meaningful Primary Keys?"

    Hi Nikos,

    If you need PK for all your tables, then maybe you need to generate them.
    But if you only need to use them for a couple tables then you should look at
    DataObjectUtils class.

    Cheers,
    Pierre

    Cordialement,
    Pierre Lavignotte
    Ingénieur Conception & Développement
    http://pierre.lavignotte.googlepages.com

    On Mon, Feb 2, 2009 at 12:35 PM, Νίκος Παράσχου <niparas..mail.com> wrote:

    > Hello,
    >
    > It is the first time I am using cayenne and I have some questions
    > regarding the primary keys.
    >
    > What I want to do is select some rows of a table where the PK has a
    > specific value. The problem is I can't access the PK. I can specify
    > qualifiers only with the non-PK columns. The PKs I am using have some
    > meaning (they are not just numbers) so it is very important to be able
    > to use them.
    >
    > How can I add the PK to the fields of the Object Entities?
    >
    > In this page http://cayenne.apache.org/doc20/primary-key-generation.html
    > the answer is to create a Meaningful Primary Key.
    >
    > How can I create Meaningful Primary Keys?
    >
    > Are there any security issues when using Meaningful Primary Keys?
    >
    > Thank you for your time,
    > Nikos
    >
    >



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