Something is wrong with your model or how you are creating this new object.  
Are you setting the relationship both ways?


On 2012-05-31, at 6:04 AM, Raghavender Bokka wrote:

> Hi Team,
> 
> I have created an enterprise object with one-to-many relationship objects 
> associating.  Then in the search page searched for these enterprise objects 
> (that has WODisplayGroup), I am able to view the newly created object, but 
> when I try to select that object to view the details it is generating the 
> following exception.   If I restart the application then I am able to view 
> the details of the newly created object without any error, or If we try 
> accessing the newly created object after sometime (around half an hour later) 
> then without error able to view the object details.  Otherwise the enterprise 
> object is getting null.
> 
> This enterprise object's super class has the database table, and this object 
> does not has the database table, it points to the same database table of the 
> super class.  And the to-many relationship is existing with this enterprise 
> object (sub-class), not the super class.
> 
> Any help would be appreciated.
> 
> ------------------------EXCEPTION--------------------------------------------------
> [2012-5-31 8:25:4 EDT] <WorkerThread7> java.lang.NullPointerException
>        at 
> com.webobjects.eoaccess.EODatabaseContext.arrayFaultWithSourceGlobalID(EODatabaseContext.java:3510)
>        at 
> com.webobjects.eoaccess.EODatabaseContext._fireDeferredFaultWithSourceObject(EODatabaseContext.java:2377)
>        at 
> com.webobjects.eoaccess.EOAccessDeferredFaultHandler.createFaultForDeferredFault(EOAccessDeferredFaultHandler.java:49)
>        at 
> com.webobjects.eocontrol.EOCustomObject.willReadRelationship(EOCustomObject.java:1279)
>        at 
> com.webobjects.eocontrol._EOMutableKnownKeyDictionary$Initializer$_LazyGenericRecordBinding.valueInObject(_EOMutableKnownKeyDictionary.java:614)
>        at 
> com.webobjects.eocontrol.EOCustomObject.storedValueForKey(EOCustomObject.java:1634)
>        at _StoredDistrictTest.storedTestItems(_StoredDistrictTest.java:33)
>        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>        at 
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
>        at 
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>        at java.lang.reflect.Method.invoke(Method.java:597)
>        at 
> KeyValueCodingProtectedAccessor.methodValue(KeyValueCodingProtectedAccessor.java:60)
>        at 
> com.webobjects.foundation.NSKeyValueCoding$_MethodBinding.valueInObject(NSKeyValueCoding.java:1134)
>        at 
> com.webobjects.eocontrol.EOCustomObject.valueForKey(EOCustomObject.java:1498)
>        at 
> com.webobjects.eocontrol.EOCustomObject.eoDescription(EOCustomObject.java:793)
>        at 
> com.webobjects.eocontrol.EOCustomObject.toString(EOCustomObject.java:299)
>        at java.lang.String.valueOf(String.java:2826)
>        at java.lang.StringBuilder.append(StringBuilder.java:115)
>        at StoredTestListPage.printTestSession(StoredTestListPage.java:276)
>        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>        at 
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
>        at 
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>        at java.lang.reflect.Method.invoke(Method.java:597)
>        at 
> KeyValueCodingProtectedAccessor.methodValue(KeyValueCodingProtectedAccessor.java:60)
>        at 
> com.webobjects.foundation.NSKeyValueCoding$_MethodBinding.valueInObject(NSKeyValueCoding.java:1134)
>        at 
> com.webobjects.foundation.NSKeyValueCoding$DefaultImplementation.valueForKey(NSKeyValueCoding.java:1324)
>        at 
> com.webobjects.appserver.WOComponent.valueForKey(WOComponent.java:1736)
>        at 
> com.webobjects.foundation.NSKeyValueCoding$Utility.valueForKey(NSKeyValueCoding.java:447)
>        at 
> com.webobjects.foundation.NSKeyValueCodingAdditions$DefaultImplementation.valueForKeyPath(NSKeyValueCodingAdditions.java:212)
>        at 
> com.webobjects.appserver.WOComponent.valueForKeyPath(WOComponent.java:1804)
>        at 
> com.webobjects.appserver._private.WOKeyValueAssociation.valueInComponent(WOKeyValueAssociation.java:50)
>        at 
> com.webobjects.appserver._private.WOHyperlink.invokeAction(WOHyperlink.java:98)
>        at 
> er.extensions.components._private.ERXHyperlink.invokeAction(ERXHyperlink.java:66)
>        at 
> com.webobjects.appserver._private.WODynamicGroup.invokeChildrenAction(WODynamicGroup.java:105)
>        at 
> com.webobjects.appserver._private.WODynamicGroup.invokeAction(WODynamicGroup.java:115)
>        at 
> er.extensions.components._private.ERXWORepetition.invokeAction(ERXWORepetition.java:496)
>        at 
> com.webobjects.appserver._private.WODynamicGroup.invokeChildrenAction(WODynamicGroup.java:105)
>        at 
> com.webobjects.appserver._private.WODynamicGroup.invokeAction(WODynamicGroup.java:115)
>        at 
> com.webobjects.appserver._private.WOConditional.invokeAction(WOConditional.java:86)
>        at 
> com.webobjects.appserver._private.WODynamicGroup.invokeChildrenAction(WODynamicGroup.java:105)
>        at 
> com.webobjects.appserver._private.WODynamicGroup.invokeAction(WODynamicGroup.java:115)
>        at 
> com.webobjects.appserver._private.WOConditional.invokeAction(WOConditional.java:86)
>        at 
> com.webobjects.appserver._private.WODynamicGroup.invokeChildrenAction(WODynamicGroup.java:105)
>        at 
> com.webobjects.appserver._private.WODynamicGroup.invokeAction(WODynamicGroup.java:115)
>        at 
> er.extensions.components._private.ERXWOForm.invokeAction(ERXWOForm.java:219)
>        at 
> com.webobjects.appserver._private.WODynamicGroup.invokeChildrenAction(WODynamicGroup.java:105)
>        at 
> com.webobjects.appserver._private.WODynamicGroup.invokeAction(WODynamicGroup.java:115)
>        at 
> com.webobjects.appserver._private.WOConditional.invokeAction(WOConditional.java:86)
>        at 
> com.webobjects.appserver._private.WODynamicGroup.invokeChildrenAction(WODynamicGroup.java:105)
>        at 
> com.webobjects.appserver._private.WODynamicGroup.invokeAction(WODynamicGroup.java:115)
>        at 
> com.webobjects.appserver._private.WOComponentContent.invokeAction(WOComponentContent.java:38)
>        at 
> com.webobjects.appserver._private.WODynamicGroup.invokeChildrenAction(WODynamicGroup.java:105)
>        at 
> com.webobjects.appserver._private.WODynamicGroup.invokeAction(WODynamicGroup.java:115)
>        at 
> com.webobjects.appserver._private.WOConditional.invokeAction(WOConditional.java:86)
>        at 
> com.webobjects.appserver._private.WODynamicGroup.invokeChildrenAction(WODynamicGroup.java:105)
>        at 
> com.webobjects.appserver._private.WODynamicGroup.invokeAction(WODynamicGroup.java:115)
>        at 
> com.webobjects.appserver._private.WOHTMLURLValuedElement.invokeAction(WOHTMLURLValuedElement.java:149)
>        at 
> com.webobjects.appserver._private.WODynamicGroup.invokeChildrenAction(WODynamicGroup.java:105)
>        at 
> com.webobjects.appserver._private.WODynamicGroup.invokeAction(WODynamicGroup.java:115)
>        at 
> com.webobjects.appserver.WOComponent.invokeAction(WOComponent.java:1079)
>        at 
> er.extensions.components.ERXComponent.invokeAction(ERXComponent.java:102)
>        at 
> com.webobjects.appserver._private.WOComponentReference.invokeAction(WOComponentReference.java:127)
>        at 
> com.webobjects.appserver._private.WODynamicGroup.invokeChildrenAction(WODynamicGroup.java:105)
>        at 
> com.webobjects.appserver._private.WODynamicGroup.invokeAction(WODynamicGroup.java:115)
>        at 
> com.webobjects.appserver.WOComponent.invokeAction(WOComponent.java:1079)
>        at 
> er.extensions.components.ERXComponent.invokeAction(ERXComponent.java:102)
>        at com.webobjects.appserver.WOSession.invokeAction(WOSession.java:1357)
>        at Session.invokeAction(Session.java:179)
>        at 
> com.webobjects.appserver.WOApplication.invokeAction(WOApplication.java:1745)
>        at 
> er.extensions.appserver.ajax.ERXAjaxApplication.invokeAction(ERXAjaxApplication.java:93)
>        at 
> er.extensions.appserver.ERXApplication.invokeAction(ERXApplication.java:1869)
>        at 
> com.webobjects.appserver._private.WOComponentRequestHandler._dispatchWithPreparedPage(WOComponentRequestHandler.java:206)
>        at 
> com.webobjects.appserver._private.WOComponentRequestHandler._dispatchWithPreparedSession(WOComponentRequestHandler.java:298)
>        at 
> com.webobjects.appserver._private.WOComponentRequestHandler._dispatchWithPreparedApplication(WOComponentRequestHandler.java:332)
>        at 
> com.webobjects.appserver._private.WOComponentRequestHandler._handleRequest(WOComponentRequestHandler.java:369)
>        at 
> com.webobjects.appserver._private.WOComponentRequestHandler.handleRequest(WOComponentRequestHandler.java:442)
>        at 
> com.webobjects.appserver.WOApplication.dispatchRequest(WOApplication.java:1687)
>        at 
> er.extensions.appserver.ERXApplication.dispatchRequestImmediately(ERXApplication.java:1984)
>        at 
> er.extensions.appserver.ERXApplication.dispatchRequest(ERXApplication.java:1949)
>        at Application.dispatchRequest(Application.java:742)
>        at 
> com.webobjects.appserver._private.WOWorkerThread.runOnce(WOWorkerThread.java:144)
>        at 
> com.webobjects.appserver._private.WOWorkerThread.run(WOWorkerThread.java:226)
>        at java.lang.Thread.run(Thread.java:619)
> -------------------- 
> 
> Regards,
> Raghu.
> 
> 
> 
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-- 
Chuck Hill             Senior Consultant / VP Development

Practical WebObjects - for developers who want to increase their overall 
knowledge of WebObjects or who are trying to solve specific problems.    
http://www.global-village.net/gvc/practical_webobjects








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