Re: Can't extract a master key

From: Andrus Adamchik (andru..bjectstyle.org)
Date: Thu Jul 31 2008 - 14:21:26 EDT

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    Hi Dave,

    MyDataObject is likely mapped to get its PK from the related "master"
    object. The exception means that the "master" object does not yet have
    a PK yet when MyDataObject is committed. So how is the PK generation
    set for the master object entity? Are you using auto-incremented PKs
    by any chance? Do you see the master saved before MyDataObject in the
    SQL log?

    Andrus

    On Jul 30, 2008, at 11:43 PM, Dave Dombrosky wrote:

    > I am currently getting a strange exception when trying to commit some
    > objects to the db. I'm hoping someone here can help me figure it out.
    >
    > org.apache.cayenne.CayenneRuntimeException: [v.3.0-SNAPSHOT May 16
    > 2008 12:28:23] Can't extract a master key. Missing key (id), master ID
    > (<ObjectId:MyDataObject, TEMP:001A1A0065510101>)
    > at org.apache.cayenne.access.DataDomainSyncBucket
    > $PropagatedValueFactory.create(DataDomainSyncBucket.java:303)
    > at org.apache.cayenne.query.BatchQuery.getValue(BatchQuery.java:
    > 171)
    > at
    > org
    > .apache
    > .cayenne.query.InsertBatchQuery.getValue(InsertBatchQuery.java:62)
    > at
    > org
    > .apache
    > .cayenne
    > .access
    > .trans
    > .InsertBatchQueryBuilder
    > .getParameterValues(InsertBatchQueryBuilder.java:83)
    > at
    > org
    > .apache.cayenne.access.jdbc.BatchAction.runAsBatch(BatchAction.java:
    > 121)
    > at
    > org
    > .apache
    > .cayenne.access.jdbc.BatchAction.performAction(BatchAction.java:80)
    > at
    > org
    > .apache
    > .cayenne
    > .access.DataNodeQueryAction.runQuery(DataNodeQueryAction.java:58)
    > at
    > org.apache.cayenne.access.DataNode.performQueries(DataNode.java:230)
    > at
    > org
    > .apache
    > .cayenne
    > .access.DataDomainFlushAction.runQueries(DataDomainFlushAction.java:
    > 227)
    > at
    > org
    > .apache
    > .cayenne
    > .access.DataDomainFlushAction.flush(DataDomainFlushAction.java:145)
    > at
    > org.apache.cayenne.access.DataDomain.onSyncFlush(DataDomain.java:821)
    > at org.apache.cayenne.access.DataDomain
    > $2.transform(DataDomain.java:788)
    > at
    > org
    > .apache.cayenne.access.DataDomain.runInTransaction(DataDomain.java:
    > 847)
    > at org.apache.cayenne.access.DataDomain.onSync(DataDomain.java:
    > 785)
    > at
    > org.apache.cayenne.access.DataContext.flushToParent(DataContext.java:
    > 1164)
    > at
    > org.apache.cayenne.access.DataContext.commitChanges(DataContext.java:
    > 1066)
    >
    > Any idea what this means? I'm using some 1:1 mappings on the PK of
    > this table, and also some cayenne inheritance, so it's possible I set
    > something up wrong.
    >
    > -Dave
    >

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