Re: Newbie Question: Mapping a Collection of Strings

From: Andrus Adamchik (andru..bjectstyle.org)
Date: Wed Aug 26 2009 - 09:44:55 EDT

  • Next message: Michael Gentry: "Re: Newbie Question: Mapping a Collection of Strings"

    Hi Brett,

    You will have to map a Keyword class in both 2.0 and 3.0, and maybe
    create a cover method converting a list of Keywords to a list of
    Strings on the fly.

    3.0 supports something called "flattened attributes", which is what
    you describe, but only for to-one relationships.

    Andrus

    On Aug 26, 2009, at 5:08 AM, Bret Gregory wrote:

    > I have a DB that looks something like this:
    >
    > Product
    > -ProductId
    > -Description
    >
    > Keyword
    > -ProductId
    > -Keyword
    >
    > Where Product -> Keyword is 1:N and Keyword has a FK rel back to
    > Product.
    >
    > I would like the object model to look something like this:
    >
    > Product
    > -(String) _description
    > -(List<String>) _keywords
    >
    > Is it possible to map collections of simple objects and have them
    > persisted by Cayenne? Seems like this would be a pretty common
    > request, but
    > I am not seeing a way to do this in the modeler.
    >
    >
    >
    >

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