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What is wrong with this code?

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What is wrong with this code?

Subject: What is wrong with this code?
From: Kevin Windham <email@hidden>
Date: Thu, 12 Apr 2007 16:07:26 -0500

I have a user class in my session class. I also have a club class. I am trying to add a new club to my user and am using the following code.

		Session session = (Session)session();
		EOEditingContext ec = session.defaultEditingContext();
		Club club = new Club();
		ec.insertObject(club);
		club.setApproved(false);
		club.setClubName(clubName);
		club.setWebsite(clubWebsite);
		session.user.addToClubs(club);
		ec.saveChanges();

The code causes an exception at the addToClubs(club) line. I am unsure as to why this is. I have used similar code before. My guess is that it has something to do with the eomodel and the way many to manys work versus one to manys. The other code I've written like this before deals with one to many relationships. In this case, the user- clubs is a many to many. From what I've read in the docs, WO should be able to handle the linking table automatically, but it doesn't seem to be working that way. Did I miss something, or does this just not work this way?

Thanks,
Kevin

Here is the exception and trace.

Error: java.lang.ClassCastException: com.webobjects.foundation.NSArray Reason: com.webobjects.foundation.NSArray Stack trace: File Line# Method Package NSArray.java 1167 _mutableComponentsSeparatedByString com.webobjects.foundation EOSQLExpression.java 1885 sqlStringForSchemaObjectName com.webobjects.eoaccess EOSQLExpression.java 264 _aliasForRelatedAttributeRelationshipPath com.webobjects.eoaccess EOSQLExpression.java 1168 joinExpression com.webobjects.eoaccess EOSQLExpression.java 1033 prepareSelectExpressionWithAttributes com.webobjects.eoaccess JDBCExpression.java 273 prepareSelectExpressionWithAttributes com.webobjects.jdbcadaptor EOSQLExpressionFactory.java 226 selectStatementForAttributes com.webobjects.eoaccess JDBCChannel.java 178 selectAttributes com.webobjects.jdbcadaptor EODatabaseChannel.java 878 _selectWithFetchSpecificationEditingContext com.webobjects.eoaccess EODatabaseChannel.java 215 selectObjectsWithFetchSpecification com.webobjects.eoaccess EODatabaseContext.java 3205 _objectsWithFetchSpecificationEditingContext com.webobjects.eoaccess EODatabaseContext.java 3346 objectsWithFetchSpecification com.webobjects.eoaccess EOObjectStoreCoordinator.java 539 objectsWithFetchSpecification com.webobjects.eocontrol EOEditingContext.java 4114 objectsWithFetchSpecification com.webobjects.eocontrol ERXEC.java 1075 objectsWithFetchSpecification er.extensions EODatabaseContext.java 4260 objectsForSourceGlobalID com.webobjects.eoaccess EOObjectStoreCoordinator.java 682 objectsForSourceGlobalID com.webobjects.eocontrol EOEditingContext.java 3965 objectsForSourceGlobalID com.webobjects.eocontrol ERXEC.java 1036 objectsForSourceGlobalID er.extensions EODatabaseContext.java 4427 _fireArrayFault com.webobjects.eoaccess EOAccessArrayFaultHandler.java 70 completeInitializationOfObject com.webobjects.eoaccess _EOCheapCopyMutableArray.java 38 willRead com.webobjects.eocontrol _EOCheapCopyMutableArray.java 92 count com.webobjects.eocontrol NSArray.java 639 containsObject com.webobjects.foundation EOCustomObject.java 907 includeObjectIntoPropertyWithKey com.webobjects.eocontrol User.java 212 addToClubs User MyClubs_AddClubRequest.java 32 submitAction MyClubs_AddClubRequest NativeMethodAccessorImpl.java NA invoke0 sun.reflect NativeMethodAccessorImpl.java 39 invoke sun.reflect DelegatingMethodAccessorImpl.java 25 invoke sun.reflect Method.java 585 invoke java.lang.reflect KeyValueCodingProtectedAccessor.java 54 methodValue KeyValueCodingProtectedAccessor NSKeyValueCoding.java 1160 valueInObject com.webobjects.foundation NSKeyValueCoding.java 1268 valueForKey com.webobjects.foundation WOComponent.java 1539 valueForKey com.webobjects.appserver NSKeyValueCoding.java 498 valueForKey com.webobjects.foundation NSKeyValueCodingAdditions.java 212 valueForKeyPath com.webobjects.foundation WOComponent.java 1600 valueForKeyPath com.webobjects.appserver WOKeyValueAssociation.java 46 valueInComponent com.webobjects.appserver._private WOSubmitButton.java 70 invokeAction com.webobjects.appserver._private ERXPatcher.java 159 invokeAction er.extensions WODynamicGroup.java 101 invokeChildrenAction com.webobjects.appserver._private WODynamicGroup.java 110 invokeAction com.webobjects.appserver._private ERXWOForm.java 127 invokeAction er.extensions WODynamicGroup.java 101 invokeChildrenAction com.webobjects.appserver._private WODynamicGroup.java 110 invokeAction com.webobjects.appserver._private WOComponentContent.java 31 invokeAction com.webobjects.appserver._private WODynamicGroup.java 101 invokeChildrenAction com.webobjects.appserver._private WODynamicGroup.java 110 invokeAction com.webobjects.appserver._private WOComponent.java 945 invokeAction com.webobjects.appserver WOComponentReference.java 104 invokeAction com.webobjects.appserver._private WODynamicGroup.java 101 invokeChildrenAction com.webobjects.appserver._private WODynamicGroup.java 110 invokeAction com.webobjects.appserver._private WOComponent.java 945 invokeAction com.webobjects.appserver WOSession.java 1168 invokeAction com.webobjects.appserver WOApplication.java 1375 invokeAction com.webobjects.appserver ERXAjaxApplication.java 74 invokeAction er.extensions ERXApplication.java 1053 invokeAction er.extensions WOComponentRequestHandler.java 196 _dispatchWithPreparedPage com.webobjects.appserver._private WOComponentRequestHandler.java 287 _dispatchWithPreparedSession com.webobjects.appserver._private WOComponentRequestHandler.java 322 _dispatchWithPreparedApplication com.webobjects.appserver._private WOComponentRequestHandler.java 358 _handleRequest com.webobjects.appserver._private WOComponentRequestHandler.java 432 handleRequest com.webobjects.appserver._private WOApplication.java 1306 dispatchRequest com.webobjects.appserver ERXApplication.java 1102 dispatchRequest er.extensions WOWorkerThread.java 173 runOnce com.webobjects.appserver._private WOWorkerThread.java 254 run com.webobjects.appserver._private Thread.java 613 run java.lang


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