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Re: Many to Many Grief
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Re: Many to Many Grief

  • Subject: Re: Many to Many Grief
  • From: Chuck Hill <email@hidden>
  • Date: Tue, 5 Apr 2005 17:36:33 -0700
It looks like something is wrong in your model, with the relationship. Double check it to make sure that every thing is connected and there are no missing parts.

Chuck


On Apr 5, 2005, at 5:08 PM, Greg wrote:

Hi,
I have an Entity name ProUser and another call ProService. ProService is a list of services that the user can select that they offer via checkboxes. I used the Create Many to many menu option in EOModeller to create the relationship which flattens it into ProUser. I created a component that I wanted to have a list of all the checkboxes so that the user can select which ones they want. I used a WOCheckBoxList and hooked everything up and it throws an Exception (see below). I thought this might have been me misusing the WOCheckBoxList component so I changed it to a CheckBoxMatrix with a maxColumns of 1 to effectively give the same display behaviour, but the SAME exception occurs, so I'm at a loss as to why.

I had a search through the archives and looked for previous problems and made sure that I was following the commandments of EOF (you know the ones I recite when go to bed at night and when I wake up in the morning :-)). I was trying to see if I can actually turn on debugging of the raw rows returned from the db, but couldn't seem to find anything in NSLog's javadoc.

Does anyone have any suggestions on trying to figure what is a miss?

Any help is greatly appreciated.

Regards,
Greg

2005-04-06 09:59:42,002 DEBUG ShoeBox[-:50212 2] NSLog (ERXNSLogLog4jBridge.java:44) - === Begin Internal Transaction
2005-04-06 09:59:42,007 DEBUG ShoeBox[-:50212 2] NSLog (ERXNSLogLog4jBridge.java:44) - evaluateExpression: <com.webobjects.jdbcadaptor.PostgresqlExpression: "SELECT t0.name, t0.serviceID FROM ProService t0">
2005-04-06 09:59:42,015 DEBUG ShoeBox[-:50212 2] NSLog (ERXNSLogLog4jBridge.java:44) - 8 row(s) processed
2005-04-06 09:59:42,020 DEBUG ShoeBox[-:50212 2] NSLog (ERXNSLogLog4jBridge.java:44) - === Commit Internal Transaction
2005-04-06 09:59:42,126 WARN ShoeBox[-:50212 2] NSLog (ERXNSLogLog4jBridge.java:41) - <com.webobjects.appserver._private.WOComponentRequestHandler>: Exception occurred while handling request:
java.lang.NullPointerException
[2005-04-06 09:59:42 EST] <WorkerThread1> java.lang.NullPointerException
at com.webobjects.foundation._NSStringUtilities.concat(_NSStringUtilities. java:213)
at com.webobjects.eoaccess.EOSQLExpression._aliasForRelatedAttributeRelati onshipPath(EOSQLExpression.java:264)
at com.webobjects.eoaccess.EOSQLExpression.joinExpression(EOSQLExpression. java:1169)
at com.webobjects.eoaccess.EOSQLExpression.prepareSelectExpressionWithAttr ibutes(EOSQLExpression.java:1033)
at com.webobjects.jdbcadaptor.JDBCExpression.prepareSelectExpressionWithAt tributes(JDBCExpression.java:273)
at com.webobjects.eoaccess.EOSQLExpressionFactory.selectStatementForAttrib utes(EOSQLExpressionFactory.java:219)
at com.webobjects.jdbcadaptor.JDBCChannel.selectAttributes(JDBCChannel.jav a:178)
at com.webobjects.eoaccess.EODatabaseChannel._selectWithFetchSpecification EditingContext(EODatabaseChannel.java:879)
at com.webobjects.eoaccess.EODatabaseChannel.selectObjectsWithFetchSpecifi cation(EODatabaseChannel.java:216)
at com.webobjects.eoaccess.EODatabaseContext._objectsWithFetchSpecificatio nEditingContext(EODatabaseContext.java:3196)
at com.webobjects.eoaccess.EODatabaseContext.objectsWithFetchSpecification (EODatabaseContext.java:3337)
at com.webobjects.eocontrol.EOObjectStoreCoordinator.objectsWithFetchSpeci fication(EOObjectStoreCoordinator.java:539)
at com.webobjects.eocontrol.EOEditingContext.objectsWithFetchSpecification (EOEditingContext.java:4053)
at er.extensions.ERXEC.objectsWithFetchSpecification(ERXEC.java:547)
at com.webobjects.eoaccess.EODatabaseContext.objectsForSourceGlobalID(EODa tabaseContext.java:4251)
at com.webobjects.eocontrol.EOObjectStoreCoordinator.objectsForSourceGloba lID(EOObjectStoreCoordinator.java:682)
at com.webobjects.eocontrol.EOEditingContext.objectsForSourceGlobalID(EOEd itingContext.java:3904)
at er.extensions.ERXEC.objectsForSourceGlobalID(ERXEC.java:517)
at com.webobjects.eoaccess.EODatabaseContext._fireArrayFault(EODatabaseCon text.java:4418)
at com.webobjects.eoaccess.EOAccessArrayFaultHandler.completeInitializatio nOfObject(EOAccessArrayFaultHandler.java:70)
at com.webobjects.eocontrol._EOCheapCopyMutableArray.willRead(_EOCheapCopy MutableArray.java:38)
at com.webobjects.eocontrol._EOCheapCopyMutableArray.count(_EOCheapCopyMut ableArray.java:92)
at com.webobjects.foundation.NSArray.containsObject(NSArray.java:601)
at com.webobjects.appserver._private.WOCheckBoxList.appendToResponse(WOChe ckBoxList.java:254)
at er.extensions.ERXPatcher$DynamicElementsPatches$CheckBoxList.appendToRe sponse(ERXPatcher.java:397)
at com.webobjects.appserver._private.WODynamicGroup.appendChildrenToRespon se(WODynamicGroup.java:121)
at com.webobjects.appserver._private.WOForm.appendChildrenToResponse(WOFor m.java:124)
at er.extensions.ERXWOForm.appendToResponse(ERXWOForm.java:68)
at com.webobjects.appserver._private.WOComponentContent.appendToResponse(W OComponentContent.java:43)
at com.webobjects.appserver._private.WODynamicGroup.appendChildrenToRespon se(WODynamicGroup.java:121)
at com.webobjects.appserver._private.WODynamicGroup.appendToResponse(WODyn amicGroup.java:130)
at com.webobjects.appserver.WOComponent.appendToResponse(WOComponent.java: 992)
at com.webobjects.appserver._private.WOComponentReference.appendToResponse (WOComponentReference.java:111)
at com.webobjects.appserver._private.WODynamicGroup.appendChildrenToRespon se(WODynamicGroup.java:121)
at com.webobjects.appserver._private.WODynamicGroup.appendToResponse(WODyn amicGroup.java:130)
at com.webobjects.appserver.WOComponent.appendToResponse(WOComponent.java: 992)
at au.com.shoebox.woapplication.ShoeBoxComponent.appendToResponse(ShoeBoxC omponent.java:67)
at com.webobjects.appserver.WOSession.appendToResponse(WOSession.java: 1198)
at er.extensions.ERXSession.appendToResponse(ERXSession.java:510)
at com.webobjects.appserver.WOApplication.appendToResponse(WOApplication.j ava:1418)
at er.extensions.ERXApplication.appendToResponse(ERXApplication.java:606)
at com.webobjects.appserver._private.WOComponentRequestHandler._dispatchWi thPreparedPage(WOComponentRequestHandler.java:230)
at com.webobjects.appserver._private.WOComponentRequestHandler._dispatchWi thPreparedSession(WOComponentRequestHandler.java:287)
at com.webobjects.appserver._private.WOComponentRequestHandler._dispatchWi thPreparedApplication(WOComponentRequestHandler.java:322)
at com.webobjects.appserver._private.WOComponentRequestHandler._handleRequ est(WOComponentRequestHandler.java:358)
at com.webobjects.appserver._private.WOComponentRequestHandler.handleReque st(WOComponentRequestHandler.java:432)
at com.webobjects.appserver.WOApplication.dispatchRequest(WOApplication.ja va:1306)
at er.extensions.ERXApplication.dispatchRequest(ERXApplication.java:638)
at com.webobjects.appserver._private.WOWorkerThread.runOnce(WOWorkerThread .java:173)
at com.webobjects.appserver._private.WOWorkerThread.run(WOWorkerThread.jav a:254)
at java.lang.Thread.run(Thread.java:552)

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 >Many to Many Grief (From: Greg <email@hidden>)






    

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