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https://issues.apache.org/cayenne/browse/CAY-1195?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Andrey Razumovsky closed CAY-1195.
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Resolution: Won't Fix
Sorry, there's no fix avaliable. This one can also be reproduced with normal
contexts, and much easier:
ClientMtTable4 parentMt = context.newObject(ClientMtTable4.class);
ClientMtTable4 parentMtCopy = (ClientMtTable4)
context2.localObject(parentMt.getObjectId(), null);
parentMtCopy.getTable5s();
"parentMtCopy" object, which is created using localObject(..., *null*) is
HOLLOW. As you didn't specify any info in second parameter, there's no way to
resolve the object! And parentMt is not commited, so fetch from DB also fails.
I first thought we could forbid creating localObject(...) copy from NEW object.
But this is also not good, because I could write something like this:
ClientMtTable4 parentMt = context.newObject(ClientMtTable4.class);
ClientMtTable4 parentMtCopy = (ClientMtTable4)
context2.localObject(parentMt.getObjectId(), null);
context.commitChanges();
parentMtCopy.getTable5s();
And it would work!
> cannot access a many to many relationship before commit
> -------------------------------------------------------
>
> Key: CAY-1195
> URL: https://issues.apache.org/cayenne/browse/CAY-1195
> Project: Cayenne
> Issue Type: Bug
> Components: Cayenne Core Library
> Affects Versions: 3.0M6
> Environment: ROP
> Reporter: Marcin Skladaniec
> Assignee: Andrey Razumovsky
>
> the many to many relationship cannot be accessed from the other side that it
> was set.
> test case (sorry not as a patch, to much other modifications to be able to
> create a diff)
> public void testCAY1195() throws Exception {
> deleteTestData();
>
> ClientMtTable4 parentMt = context.newObject(ClientMtTable4.class);
> ClientMtTable5 childMt5 = context2.newObject(ClientMtTable5.class);
> // I added context2 to the RemoteCayenneCase. it is created the same way as
> the original context
>
> assertEquals(0,parentMt.getTable5s().size());
> assertEquals(0,childMt5.getTable4s().size());
>
> ClientMtTable4 parentMtCopy =
> (ClientMtTable4)context2.localObject(parentMt.getObjectId(), null);
> childMt5.addToTable4s(parentMtCopy);
>
> assertEquals(1,parentMtCopy.getTable5s().size());
> assertEquals(1,childMt5.getTable4s().size());
> }
> this test throws a following exception:
> Tests run: 17, Failures: 1, Errors: 1, Skipped: 0, Time elapsed: 0.415 sec
> <<< FAILURE!
> testCAY1195(org.apache.cayenne.remote.NestedObjectContextTest) Time elapsed:
> 0.016 sec <<< ERROR!
> org.apache.cayenne.CayenneRuntimeException: [v.3.0-SNAPSHOT
> ${project.build.date} ${project.build.time}] Can't build a query for
> temporary id: <ObjectId:MtTable4, TEMP:0191B517AE610004>
> at
> org.apache.cayenne.query.ObjectIdQuery.createReplacementQuery(ObjectIdQuery.java:124)
> at
> org.apache.cayenne.query.IndirectQuery.getReplacementQuery(IndirectQuery.java:74)
> at org.apache.cayenne.query.IndirectQuery.route(IndirectQuery.java:57)
> at
> org.apache.cayenne.access.DataDomainQueryAction.runQuery(DataDomainQueryAction.java:414)
> at
> org.apache.cayenne.access.DataDomainQueryAction.access$0(DataDomainQueryAction.java:401)
> at
> org.apache.cayenne.access.DataDomainQueryAction$2.transform(DataDomainQueryAction.java:395)
> at
> org.apache.cayenne.access.DataDomain.runInTransaction(DataDomain.java:846)
> at
> org.apache.cayenne.access.DataDomainQueryAction.runQueryInTransaction(DataDomainQueryAction.java:392)
> at
> org.apache.cayenne.access.UnitTestDomainQueryAction.runQueryInTransaction(UnitTestDomainQueryAction.java:54)
> at
> org.apache.cayenne.access.DataDomainQueryAction.interceptOIDQuery(DataDomainQueryAction.java:156)
> at
> org.apache.cayenne.access.DataDomainQueryAction.execute(DataDomainQueryAction.java:113)
> at
> org.apache.cayenne.access.UnitTestDomainQueryAction.execute(UnitTestDomainQueryAction.java:48)
> at
> org.apache.cayenne.access.UnitTestDomain.onQuery(UnitTestDomain.java:63)
> at
> org.apache.cayenne.util.ObjectContextQueryAction.runQuery(ObjectContextQueryAction.java:333)
> at
> org.apache.cayenne.util.ObjectContextQueryAction.execute(ObjectContextQueryAction.java:96)
> at org.apache.cayenne.access.DataContext.onQuery(DataContext.java:1268)
> at
> org.apache.cayenne.access.ClientServerChannelQueryAction.runQuery(ClientServerChannelQueryAction.java:119)
> at
> org.apache.cayenne.access.ClientServerChannelQueryAction.execute(ClientServerChannelQueryAction.java:65)
> at
> org.apache.cayenne.access.ClientServerChannel.onQuery(ClientServerChannel.java:81)
> at
> org.apache.cayenne.remote.service.DispatchHelper.dispatch(DispatchHelper.java:39)
> at
> org.apache.cayenne.remote.service.LocalConnection.doSendMessage(LocalConnection.java:125)
> at
> org.apache.cayenne.remote.BaseConnection.sendMessage(BaseConnection.java:72)
> at
> org.apache.cayenne.unit.UnitLocalConnection.sendMessage(UnitLocalConnection.java:49)
> at org.apache.cayenne.remote.ClientChannel.send(ClientChannel.java:280)
> at
> org.apache.cayenne.remote.ClientChannel.onQuery(ClientChannel.java:112)
> at
> org.apache.cayenne.util.ObjectContextQueryAction.runQuery(ObjectContextQueryAction.java:333)
> at
> org.apache.cayenne.util.ObjectContextQueryAction.execute(ObjectContextQueryAction.java:96)
> at org.apache.cayenne.CayenneContext.onQuery(CayenneContext.java:348)
> at
> org.apache.cayenne.CayenneContext.performQuery(CayenneContext.java:338)
> at org.apache.cayenne.BaseContext.prepareForAccess(BaseContext.java:144)
> at
> org.apache.cayenne.testdo.mt.auto._ClientMtTable4.getTable5s(_ClientMtTable4.java:21)
> at
> org.apache.cayenne.remote.NestedObjectContextTest.testCAY1(NestedObjectContextTest.java:642)
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