Sounds like another of the infamous NSPropertyListSerialization bugs.
NSDictionary.class.isInstance(NSPropertyListSerialization.
propertyListFromString("12345")) == true
Chuck
On Feb 26, 2010, at 3:42 PM, Kieran Kelleher wrote:
Surprize, surprize, it turns out that you need some other characters
in the expression if you make a derived attribute and the expression
is simply another attribute name ..... for example to expose a PK as
a readonly "uniqueID" attribute ( don't ask - I don't care about
"PKs are a database artifact" theory ;-) ... besides Read-Only is
checked on the attr. anyway)
Even a simple SPACE before the expression will make it work...
otherwise WO fails to parse the derived expression - sounds like a
bug to me - but at least we know the workaround. If you don't like a
space, just surround it with brackets ..... like this "(oid)" ...
and that works too - great!
http://idisk.me.com/kelleherk/Public/Pictures/Skitch/spaceneeded-20100226-175822.jpg
-Kieran
PS. John, I did try your suggestion of entering columnName = "" in
the plist directly first - that was not the solution to this
particular problem.
On Feb 26, 2010, at 3:33 PM, John Huss wrote:
My model also has:
columnName = "";
for my derived attributes - maybe that matters?
John
On Fri, Feb 26, 2010 at 1:51 PM, Kieran Kelleher <[email protected]
> wrote:
Hi all,
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)
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.WOAssociation.booleanValueInComponent(WOAssociation.java:
278)
at
er
.extensions
.components
.conditionals
.ERXWOConditional.conditionInComponent(ERXWOConditional.java:47)
at
er
.extensions
.components
.conditionals
.ERXWOConditional.meetsConditionInComponent(ERXWOConditional.java:52)
at
er
.extensions
.components
.conditionals
.ERXWOConditional.appendToResponse(ERXWOConditional.java:120)
at
com
.webobjects
.appserver
._private
.WODynamicGroup.appendChildrenToResponse(WODynamicGroup.java:121)
at
com
.webobjects
.appserver
._private.WODynamicGroup.appendToResponse(WODynamicGroup.java:130)
at
com
.webobjects.appserver.WOComponent.appendToResponse(WOComponent.java:
992)
at
er
.extensions
.components.ERXComponent.appendToResponse(ERXComponent.java:107)
at
com
.webobjects
.appserver
._private
.WOComponentReference.appendToResponse(WOComponentReference.java:111)
at
com
.webobjects
.appserver
._private
.WODynamicGroup.appendChildrenToResponse(WODynamicGroup.java:121)
at
com
.webobjects
.appserver
._private.WODynamicGroup.appendToResponse(WODynamicGroup.java:130)
at
com
.webobjects
.appserver
._private
.WOComponentContent.appendToResponse(WOComponentContent.java:43)
at
com
.webobjects
.appserver
._private
.WODynamicGroup.appendChildrenToResponse(WODynamicGroup.java:121)
at
com
.webobjects
.appserver
._private
.WOGenericContainer.appendToResponse(WOGenericContainer.java:32)
at
com
.webobjects
.appserver
._private
.WODynamicGroup.appendChildrenToResponse(WODynamicGroup.java:121)
at
com
.webobjects
.appserver
._private.WODynamicGroup.appendToResponse(WODynamicGroup.java:130)
at
com
.webobjects.appserver.WOComponent.appendToResponse(WOComponent.java:
992)
at
er
.extensions
.components.ERXComponent.appendToResponse(ERXComponent.java:107)
at
wk
.webobjects
.appserver
.WKAbstractComponent.appendToResponse(WKAbstractComponent.java:487)
at
wk
.cheetah.wocomponents.PageWrapper.appendToResponse(PageWrapper.java:
247)
at
com
.webobjects
.appserver
._private
.WOComponentReference.appendToResponse(WOComponentReference.java:111)
at
com
.webobjects
.appserver
._private
.WODynamicGroup.appendChildrenToResponse(WODynamicGroup.java:121)
at
com
.webobjects
.appserver
._private.WODynamicGroup.appendToResponse(WODynamicGroup.java:130)
at
com
.webobjects.appserver.WOComponent.appendToResponse(WOComponent.java:
992)
at
er
.extensions
.components.ERXComponent.appendToResponse(ERXComponent.java:107)
at
wk
.webobjects
.appserver
.WKAbstractComponent.appendToResponse(WKAbstractComponent.java:487)
at
com.webobjects.appserver.WOSession.appendToResponse(WOSession.java:
1200)
at
er.extensions.appserver.ERXSession.appendToResponse(ERXSession.java:
540)
at
wk.webobjects.appserver.WKSession.appendToResponse(WKSession.java:
211)
at wk.cheetah.Session.appendToResponse(Session.java:442)
at
com
.webobjects
.appserver.WOApplication.appendToResponse(WOApplication.java:1418)
at
er
.extensions
.appserver.ERXApplication.appendToResponse(ERXApplication.java:1817)
at
com
.webobjects
.appserver
._private
.WOComponentRequestHandler
._dispatchWithPreparedPage(WOComponentRequestHandler.java:230)
at
com
.webobjects
.appserver
._private
.WOComponentRequestHandler
._dispatchWithPreparedSession(WOComponentRequestHandler.java:287)
at
com
.webobjects
.appserver
._private
.WOComponentRequestHandler
._dispatchWithPreparedApplication(WOComponentRequestHandler.java:322)
at
com
.webobjects
.appserver
._private
.WOComponentRequestHandler
._handleRequest(WOComponentRequestHandler.java:358)
at
com
.webobjects
.appserver
._private
.WOComponentRequestHandler
.handleRequest(WOComponentRequestHandler.java:435)
at
com
.webobjects
.appserver.WOApplication.dispatchRequest(WOApplication.java:1306)
at
er
.extensions
.appserver
.ERXApplication.dispatchRequestImmediately(ERXApplication.java:1915)
at
er
.extensions
.appserver.ERXApplication.dispatchRequest(ERXApplication.java:1880)
at
wk
.webobjects
.appserver.WKApplication.dispatchRequest(WKApplication.java:276)
at
com
.webobjects
.appserver._private.WOWorkerThread.runOnce(WOWorkerThread.java:173)
at
com
.webobjects
.appserver._private.WOWorkerThread.run(WOWorkerThread.java:254)
at java.lang.Thread.run(Thread.java:613)
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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/products/practical_webobjects
_______________________________________________
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