Apple

I tried adding a simple derived attribute to a model, as shown here:

http://idisk.me.com/kelleherk/Public/Pictures/Skitch/derived_attribute-20100226-125124.jpg

However EOF falls over as soon as I touch that entity with an error like the following. This is WO 5.3.3 btw. Looking at the source in EOSQLExpression, it would seem that the attribute_definitionArray is null, because if it is null, then the method tries to get a column name and throws this exception when there is no column name.. The eomodel itself shows the attribute like this in the plist:

{

allowsNull = Y;

definition = oid;

externalType = INT;

name = uniqueID;

valueClassName = NSNumber;

valueType = i;

}

So now I put a few statements in didFinishLaunhcing to grab that EOAttribute and check in the debugger and I find that the _definitionArray is empty. That does not seem right, does it?

http://idisk.me.com/kelleherk/Public/Pictures/Skitch/emptydefinitionarray-20100226-131150.jpg

Any ideas why this would not work, or how to troubleshoot it if it should work?

I know Wonder uses programmatically created derived attributes for COUNT(*) and aggregate functions, but is there anyone out there using model-defined derived attributes successfully?

java.lang.IllegalStateException: sqlStringForAttribute: attempt to generate SQL for attribute 'uniqueID' on entity 'CTMessage' with undefined column name. You must define a column name for this attribute before attempting a database operation.

at com.webobjects.eoaccess.EOSQLExpression.sqlStringForAttribute(EOSQLExpression.java:2064)

at com.webobjects.jdbcadaptor.JDBCExpression.addSelectListAttribute(JDBCExpression.java:362)

at com.webobjects.eoaccess.EOSQLExpression.prepareSelectExpressionWithAttributes(EOSQLExpression.java:1006)

at com.webobjects.jdbcadaptor.JDBCExpression.prepareSelectExpressionWithAttributes(JDBCExpression.java:273)

at com.webobjects.eoaccess.EOSQLExpressionFactory.selectStatementForAttributes(EOSQLExpressionFactory.java:226)

at er.extensions.jdbc.ERXSQLHelper.sqlExpressionForFetchSpecification(ERXSQLHelper.java:635)

at er.extensions.jdbc.ERXSQLHelper.sqlExpressionForFetchSpecification(ERXSQLHelper.java:569)

at er.extensions.jdbc.ERXSQLHelper.rowCountForFetchSpecification(ERXSQLHelper.java:1110)

at er.extensions.eof.ERXEOAccessUtilities.rowCountForFetchSpecification(ERXEOAccessUtilities.java:458)

at er.extensions.batching.ERXBatchingDisplayGroup.rowCount(ERXBatchingDisplayGroup.java:292)

at er.extensions.batching.ERXBatchingDisplayGroup.refetch(ERXBatchingDisplayGroup.java:362)

at er.extensions.batching.ERXBatchingDisplayGroup.fetch(ERXBatchingDisplayGroup.java:438)

at wk.eofextensions.WKEOUtils.displayGroupWithFetchSpecification(WKEOUtils.java:1061)

at wk.cheetah.wocomponents.MessagesPage.dg(MessagesPage.java:52)

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:592)

at com.webobjects.foundation.NSKeyValueCoding$ValueAccessor$1.methodValue(NSKeyValueCoding.java:684)

at com.webobjects.foundation.NSKeyValueCoding$_MethodBinding.valueInObject(NSKeyValueCoding.java:1160)

at com.webobjects.foundation.NSKeyValueCoding$DefaultImplementation.valueForKey(NSKeyValueCoding.java:1268)

at com.webobjects.appserver.WOComponent.valueForKey(WOComponent.java:1539)

at com.webobjects.foundation.NSKeyValueCoding$Utility.valueForKey(NSKeyValueCoding.java:498)

at com.webobjects.foundation.NSKeyValueCodingAdditions$DefaultImplementation.valueForKeyPath(NSKeyValueCodingAdditions.java:212)

at com.webobjects.appserver.WOComponent.valueForKeyPath(WOComponent.java:1600)

at com.webobjects.appserver._private.WOKeyValueAssociation.valueInComponent(WOKeyValueAssociation.java:46)

at com.webobjects.appserver.WOComponent.valueForBinding(WOComponent.java:735)

at er.extensions.batching.ERXFlickrBatchNavigation.displayGroup(ERXFlickrBatchNavigation.java:82)

at er.extensions.batching.ERXFlickrBatchNavigation.batchCount(ERXFlickrBatchNavigation.java:285)

at er.extensions.batching.ERXFlickrBatchNavigation.hasMultiplePages(ERXFlickrBatchNavigation.java:94)