Re: Client PK access

From: Andrus Adamchik (andru..bjectstyle.org)
Date: Sun Apr 27 2008 - 11:08:47 EDT

  • Next message: Michael Gentry: "Re: Client PK access"

    I'd say if you care about such details as PK type, you should map it
    as a meaningful ObjAttribute. I am not convinced that we need to do
    something else here.

    Andrus

    On Apr 27, 2008, at 5:08 PM, Kevin Menard wrote:

    > As part of the fix for CAY-574, we added a getPrimaryKeyNames() :
    > Collection<String> method to ObjEntity. This did the trick and
    > allowed
    > DataObjectUtils to work. Unfortunately, it doesn't expose the PK type
    > information.
    >
    > As some of you likely know, I'm working on Tapestry5-Cayenne
    > integration
    > module with Robert Zeigler. I'm trying to ensure the module works
    > just as
    > well for an ROP client as it does for traditional Cayenne server
    > apps. One
    > of the things we need to be able to handle is the coercion of keys
    > to and
    > from String values. This implies knowledge of the key class type,
    > which is
    > currently unavailable in the client.
    >
    > I'm soliciting ideas on how to improve this. Off the top of my
    > head, I'm
    > thinking something like the following:
    >
    > // Simple key-> value lookup.
    > String getPkClassName(String pkName)
    >
    > // Modification of existing method to allow PK lookups.
    > ObjAttribute getAttribute(String name, boolean includePks)
    >
    > // Rather than just have getPrimaryKeyNames(), return a mapping
    > // of the key name and its Java class.
    > Map<String, String> getPrimaryKeys()
    >
    > If possible, this is something I'd like to see squeezed in for 3.0M4,
    > because I'd really like that module to not have to rely on 3.0-
    > SNAPSHOT.
    >
    > Thanks,
    > Kevin
    >
    >



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