Re: Relationship across DataDomains (again)

From: Andrus Adamchik (andru..bjectstyle.org)
Date: Thu Sep 09 2004 - 11:14:39 EDT

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    Todd,

    There is a very simple workaround that I mentioned in reply to your
    original message
    (http://objectstyle.org/cayenne/lists/cayenne-user/2004/08/0154.html) -
    just create an ObjRelationship manually in the modeler instead of using
    "Sync..." This missing ObjRelationship is actually causing the
    exception below.

    Andrus

    On Sep 8, 2004, at 8:48 PM, Todd O'Bryan wrote:

    > After a weekend of illness, too much time spent creating interesting
    > problem sets for my intro to programming classes, grading a
    > horrendously written quiz that took waaaaay too much time to grade,
    > and generally not getting to do any real coding of my own, I'm finally
    > back to the problem I mentioned a while ago.
    >
    > I stuck methods in my classes to handle the relationships the modeler
    > didn't create, but I seem to have missed something. Here's the
    > exception with the first few objects in the stack trace:
    >
    > Unable to invoke method postNewMessage on
    > org.dupontmanual.web.forum.ShowThread$Enhance_1..ef658[ShowThread]:
    > Can't find relationship: poster
    >
    >
    > org.objectstyle.cayenne.CayenneDataObject.setToOneTarget(CayenneDataObj
    > ect.java:358)
    > org.dupontmanual.cayenne.forum.Message.setPoster(Message.java:10)
    >
    > org.dupontmanual.web.forum.ShowThread.postNewMessage(ShowThread.java:
    > 41)
    >
    > Here are (what I think are) the relevant parts of Forum.map.xml and
    > User.map.xml, the two DataDomain descriptors:
    >
    > <db-relationship name="poster" source="message" target="user"
    > toMany="false">
    > <db-attribute-pair source="poster_id" target="id"/>
    > </db-relationship>
    >
    > <db-relationship name="messages" source="user" target="message"
    > toMany="true">
    > <db-attribute-pair source="id" target="poster_id"/>
    > </db-relationship>
    >
    > And the relevant code that I put in Message.java
    >
    > public static final String POSTER_PROPERTY = "poster";
    >
    > public void setPoster(org.dupontmanual.cayenne.users.User poster) {
    > setToOneTarget("poster", poster, true);
    > }
    >
    > public org.dupontmanual.cayenne.users.User getPoster() {
    > return
    > (org.dupontmanual.cayenne.users.User)readProperty("poster");
    > }
    >
    > Anything jump out that I'm doing wrong?
    >
    > Thanks, especially after such a long time to forget about the original
    > problem,
    > Todd
    >



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