Would you mind posting a relevant part of your DataMap XML? Andrus
> On Jul 13, 2016, at 8:40 PM, Dougan Stuart <[email protected]> wrote: > > I have a class Company with a one-to-many relationship to other Companies > (parentCompany <- subCompanies). I’m able to set a Company’s parent when > creating one, but upon update I’m getting a NullPointerException in > DefaultQuotingStrategy.quotedName because it’s been sent a null attribute. > Company extends the abstract class Entity; on the DB side Entity and Company > have a one-to-one relationship, and Entity has a parentEntity reference > (which is modeled as parentCompany). The obj-relationship parentCompany is > set up with the target Company and path parentEntity. > > The null attribute is being added in > org.apache.cayenne.access.DataDomainUpdateBucket.updatedAttributes. The > method is called first with the dbEntity Entity and the an updatedSnapshot > containing parentEntity, which is what I would expect. However, after this > updatedAttributes is called with Company and an updatedSnapshot containing > parentEntity, so the following line > > attributes.add(entityAttributes.get(name)) > > will return a null attribute when trying to get the name “parentEntity” off > Company’s attributes; that attribute only exists on Entity. I’d appreciate > any help on preventing it from trying to add invalid attributes. > > I’m not sure if this is the root cause, but > DataDomainUpdateBucket.appendQueriesInternal calls updatedAttributes based > off the bucket’s dbEntities, which in this case are set in > DataDomainSyncBucket.groupObjEntitiesBySpannedDbEntities; this method is only > adding Company as a “secondary DbEntity” (as referred to in the comments) > because Company has a flattened attribute “name" that does not exist on the > Entity. > > Here’s the stack trace: > > java.lang.NullPointerException > at > org.apache.cayenne.dba.DefaultQuotingStrategy.quotedName(DefaultQuotingStrategy.java:62) > at > org.apache.cayenne.access.translator.batch.UpdateBatchTranslator.createSql(UpdateBatchTranslator.java:60) > at > org.apache.cayenne.access.translator.batch.DefaultBatchTranslator.ensureTranslated(DefaultBatchTranslator.java:52) > at > org.apache.cayenne.access.translator.batch.DefaultBatchTranslator.getSql(DefaultBatchTranslator.java:64) > at > org.apache.cayenne.access.jdbc.BatchAction.runAsBatch(BatchAction.java:103) > at > org.apache.cayenne.access.jdbc.BatchAction.performAction(BatchAction.java:90) > at > org.apache.cayenne.access.DataNodeQueryAction.runQuery(DataNodeQueryAction.java:97) > at org.apache.cayenne.access.DataNode.performQueries(DataNode.java:293) > at > org.apache.cayenne.access.DataDomainFlushAction.runQueries(DataDomainFlushAction.java:233) > at > org.apache.cayenne.access.DataDomainFlushAction.flush(DataDomainFlushAction.java:154) > at org.apache.cayenne.access.DataDomain.onSyncFlush(DataDomain.java:693) > at org.apache.cayenne.access.DataDomain$2.transform(DataDomain.java:659) > at > org.apache.cayenne.access.DataDomain.runInTransaction(DataDomain.java:720) > at > org.apache.cayenne.access.DataDomain.onSyncNoFilters(DataDomain.java:655) > at > org.apache.cayenne.access.DataDomain$DataDomainSyncFilterChain.onSync(DataDomain.java:863) > at org.apache.cayenne.access.DataDomain.onSync(DataDomain.java:636) > at > org.apache.cayenne.access.DataContext.flushToParent(DataContext.java:727) > at > org.apache.cayenne.access.DataContext.commitChanges(DataContext.java:676) > > Thanks, > Doug >
