Re: The right way to populate meaningful keys

From: Michael Gentry (mgentr..asslight.net)
Date: Thu Jul 30 2009 - 11:01:31 EDT

  • Next message: Juergen Saar: "Re: The right way to populate meaningful keys"

    Hi Juergen,

    I suspect that you need to assign the key on the other side of your
    1:1 relationship, too. Another thing you could try doing is using the
    To Dep PK checkbox in the DbEntity Relationship panel to see if
    Cayenne will auto-copy your meaningful PK for you.

    http://cayenne.apache.org/doc/to-dep-pk-checkbox.html

    I'm not sure if the To Dep PK will work that way, but it is worth a
    try. If you assign all the keys, though, it should work.

    On Thu, Jul 30, 2009 at 10:53 AM, Juergen Saar<juerge..saar.org> wrote:
    > This was my way  ...
    > But I ran in deep trouble with the ObjectId ... this seems not to be
    > sycronized
    >
    > My actual CayenneRuntimeException:
    > Can't extract a master key. Missing key (esd_abteil), master ID
    > (<ObjectId:EsSend, TEMP:0000021E6A770001>)
    >
    > It belongs to a 1:1 Relation and the PK-Values in source and target are
    > correctly set.
    > The Commit is interrupted and the Relation-Data are not inserted to DB.
    >
    >
    > In nearly all cases ... even when all data is inserted in DB the following
    > CayenneRuntimException is thrown:
    > Temporary ID hasn't been replaced on commit:{<ObjectId:EsSend,
    > TEMP:0000022273C50001>; new; ...}
    >
    > Any idea?
    > -Juergen-
    >
    > PS: I'm using the Version 2.0.4
    >
    >
    > 2009/7/30 Michael Gentry <mgentr..asslight.net>
    >
    >> Cayenne, by default, doesn't map keys from the DbEntity (database
    >> definition) to the ObjEntity (Java definition), but you can go into
    >> the ObjEntity and add them and it should be fine.  After you do that,
    >> just call the set/get methods for the keys to set/get them.  If you
    >> set a key on a new object before you commitChanges(), Cayenne will use
    >> your key instead of trying to generate one.
    >>
    >> mrg
    >>
    >>
    >> On Thu, Jul 30, 2009 at 1:24 AM, Juergen Saar<juerge..saar.org> wrote:
    >> > Hi all,
    >> >
    >> > I'm using cayenne within an old 4GL-Project with meaningful Primary Keys.
    >> >
    >> > Is there a 'best practice' to get this keys into the DataObject-Instance?
    >> >
    >> > Actually I've various trouble with this ...
    >> >
    >> >
    >> > Any hint or code-sniplet would be helpful ...
    >> > -Juergen-
    >> >
    >>
    >

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