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From: Hugi Thordarson <hugi@karlmenn.is>
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Subject: Re: Exception when adding a new object to two different relationships
Date: Fri, 8 Sep 2017 14:30:28 +0000
References: <DCF0ADA9-502E-408F-84CA-51191CB17C2A@karlmenn.is>
 <EEEAB82F-EB45-4F9A-A300-6EED8BCEA4ED@me.com>
To: user@cayenne.apache.org
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Message-Id: <2B5B5531-F27B-4701-A337-48B6A6D5B2F3@karlmenn.is>
archived-at: Fri, 08 Sep 2017 14:30:43 -0000

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Hi Amadeo,
thanks for the pointer. No, the reverse relationship doesn't matter (and =
removing it doesn't help). I have now removed it in the github repo.

And this is reproducible in different projects, I just created this =
smalll project to serve as an isolated runnable example.

- hugi


> On 8 Sep 2017, at 14:20, Amedeo Mantica <amedeomantica@me.com> wrote:
>=20
> I see an untitledRel in the Model, it looks like to be a stub inverse =
relationship... have you tried to remove it ?
>=20
> Amedeo
>=20
>> On 8 Sep 2017, at 14:05, Hugi Thordarson <hugi@karlmenn.is> wrote:
>>=20
>> Hi all,
>> I'm encountering what I believe to be a bug, that someone more =
familiar with Cayenne's internals than me might want to take a look at =
:)
>>=20
>> In short: If I create a new DataObject, add it to two different =
relationships on another object and then attempt to commit the whole =
thing=E2=80=94it fails.
>>=20
>> Consider the following code:
>>=20
>> ObjectContext oc =3D createContext();
>> Person person =3D oc.newObject( Person.class );
>> Address address =3D oc.newObject( Address.class );
>> person.addToAddresses( address );
>> person.setLatestAddress( address );
>>=20
>> oc.commitChanges();
>>=20
>> This will result in the following exception:
>>=20
>> Exception in thread "main" =
org.apache.cayenne.CayenneRuntimeException: [v.4.1.M1-SNAPSHOT Aug 31 =
2017 12:03:09] Can't extract a master key. Missing key (id), master ID =
(<ObjectId:Person, TEMP:00000058A5520119>)
>> 	at =
org.apache.cayenne.access.DataDomainSyncBucket$PropagatedValueFactory.get(=
DataDomainSyncBucket.java:290)
>> 	at =
org.apache.cayenne.query.BatchQueryRow.getValue(BatchQueryRow.java:64)
>> 	at =
org.apache.cayenne.query.InsertBatchQuery$1.getValue(InsertBatchQuery.java=
:63)
>> 	at =
org.apache.cayenne.access.translator.batch.InsertBatchTranslator.doUpdateB=
indings(InsertBatchTranslator.java:121)
>> 	at =
org.apache.cayenne.access.translator.batch.DefaultBatchTranslator.updateBi=
ndings(DefaultBatchTranslator.java:78)
>> 	at =
org.apache.cayenne.access.jdbc.BatchAction.runAsIndividualQueries(BatchAct=
ion.java:163)
>> 	at =
org.apache.cayenne.access.jdbc.BatchAction.performAction(BatchAction.java:=
87)
>> 	at =
org.apache.cayenne.access.DataNodeQueryAction.runQuery(DataNodeQueryAction=
.java:97)
>> 	at =
org.apache.cayenne.access.DataNode.performQueries(DataNode.java:293)
>> 	at =
org.apache.cayenne.access.DataDomainFlushAction.runQueries(DataDomainFlush=
Action.java:233)
>> 	at =
org.apache.cayenne.access.DataDomainFlushAction.flush(DataDomainFlushActio=
n.java:153)
>> 	at =
org.apache.cayenne.access.DataDomain.onSyncFlush(DataDomain.java:633)
>> 	at =
org.apache.cayenne.access.DataDomain.onSyncNoFilters(DataDomain.java:603)
>> 	at =
org.apache.cayenne.access.DataDomain$DataDomainSyncFilterChain.onSync(Data=
Domain.java:764)
>> 	at =
org.apache.cayenne.tx.TransactionFilter$1.perform(TransactionFilter.java:7=
3)
>> 	at =
org.apache.cayenne.tx.TransactionFilter$1.perform(TransactionFilter.java:7=
0)
>> 	at =
org.apache.cayenne.tx.DefaultTransactionManager.performInTransaction(Defau=
ltTransactionManager.java:87)
>> 	at =
org.apache.cayenne.tx.DefaultTransactionManager.performInLocalTransaction(=
DefaultTransactionManager.java:59)
>> 	at =
org.apache.cayenne.tx.DefaultTransactionManager.performInTransaction(Defau=
ltTransactionManager.java:52)
>> 	at =
org.apache.cayenne.tx.DefaultTransactionManager.performInTransaction(Defau=
ltTransactionManager.java:40)
>> 	at =
org.apache.cayenne.tx.TransactionFilter.onSync(TransactionFilter.java:70)
>> 	at =
org.apache.cayenne.access.DataDomain$DataDomainSyncFilterChain.onSync(Data=
Domain.java:764)
>> 	at =
org.apache.cayenne.access.DataDomain.onSync(DataDomain.java:590)
>> 	at =
org.apache.cayenne.access.DataContext.flushToParent(DataContext.java:742)
>> 	at =
org.apache.cayenne.access.DataContext.commitChanges(DataContext.java:691)
>> 	at pktest.Main.main(Main.java:28)
>>=20
>>=20
>>=20
>> If someone would like to have a look, I've created a project that =
replicates the problem=E2=80=94just build it and run pktest.Main
>>=20
>> https://github.com/hugith/pktest <https://github.com/hugith/pktest>
>>=20
>> Cheers,
>> - hugi
>=20


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