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A new issue has been created in JIRA.
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View the issue:
http://objectstyle.org/jira/secure/ViewIssue.jspa?key=CAY-88
Here is an overview of the issue:
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Key: CAY-88
Summary: Unable to see why my flattened toMany is read-only
Type: Bug
Status: Assigned
Priority: Major
Project: Cayenne
Components:
Cayenne Core Library
Versions:
1.0 [STABLE]
Assignee: Andrus Adamchik
Reporter: Scott Ellsworth
Created: Thu, 29 Jan 2004 8:16 PM
Updated: Thu, 29 Jan 2004 8:16 PM
Environment: MacOS X/Cayenne 1.0.6
Description:
Duplicate of email message, supplied as an issue so I can attach the map.
I have a PlayerDBEntity, a SystemDbEntity, and a PlayerSystemLinkDbEntity, with toMany relationships going from the Link to the Player and System.
I have a PlayerObjEntity and a SystemObjEntity. They each have toMany relationships that use flattening, such as linkPlayers.players.
When I tried to add a Player to a System using
StarSystem system = systems[i];
system.addToPlayers(players[thisPlayer++]);
I got the error
Exception in thread "main" org.objectstyle.cayenne.CayenneRuntimeException: [v.1.0.6 January 26 2004] Cannot modify (add to) the read-only relationship players
at org.objectstyle.cayenne.CayenneDataObject.addToManyTarget(CayenneDataObject.java:298)
at com.alodar.starmap.persist.StarSystem.addToPlayers(StarSystem.java:81)
at com.alodar.starmap.DatabasePopulator.addPlayersToSytem(DatabasePopulator.java:176)
at com.alodar.starmap.DatabasePopulator.populateByNumber(DatabasePopulator.java:76)
at com.alodar.starmap.DatabasePopulator.main(DatabasePopulator.java:42)
The systems and the players are recently created, so this is not a prefetch issue like my previous ones.
I note in the docs that many-many is supposed to work, so I suspect that something about my data model makes it not fit the many-many requirement. If it would help, I will send the data model about, as it is only 2k zipped.
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