Apple

Display Board: null

Its more than clear that there is no displayDoard where to work at, so there is some problem with he constructor no?

Gus

On Mar 12, 2008, at 6:33 PM, David LeBer wrote:

On 12-Mar-08, at 6:02 PM, Gustavo Pizano wrote:

aha ok...

you will kill me but this time i swear i google it.
Im having this
<WorkerThread0> <com.webobjects.appserver._private.WOComponentRequestHandler>: Exception occurred while handling request:
java.lang.NullPointerException
[2008-3-12 16:58:45 COT] <WorkerThread0> java.lang.NullPointerException
at com.nhlpm.pages.AddEdit.saveChanges(AddEdit.java:47)
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:585)
at com.webobjects.foundation.NSKeyValueCoding$ValueAccessor$1.methodValue(NSKeyValueCoding.java:636)
at com.webobjects.foundation.NSKeyValueCoding$_MethodBinding.valueInObject(NSKeyValueCoding.java:1134)
at com.webobjects.foundation.NSKeyValueCoding$DefaultImplementation.valueForKey(NSKeyValueCoding.java:1293)
at com.webobjects.appserver.WOComponent.valueForKey(WOComponent.java:1686)
at com.webobjects.foundation.NSKeyValueCoding$Utility.valueForKey(NSKeyValueCoding.java:447)
at com.webobjects.foundation.NSKeyValueCodingAdditions$DefaultImplementation.valueForKeyPath(NSKeyValueCodingAdditions.java:212)
at com.webobjects.appserver.WOComponent.valueForKeyPath(WOComponent.java:1754)
at com.webobjects.appserver._private.WOKeyValueAssociation.valueInComponent(WOKeyValueAssociation.java:50)
at com.webobjects.appserver._private.WOSubmitButton.invokeAction(WOSubmitButton.java:81)
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.WOForm.invokeAction(WOForm.java:141)
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:1078)
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:1078)
at com.webobjects.appserver.WOSession.invokeAction(WOSession.java:1357)
at com.webobjects.appserver.WOApplication.invokeAction(WOApplication.java:1736)
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:1678)
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:613)

when I pusch the save changes....
it pointein to this line of code
displayBoard().setBigImage(uploadedImageData());

Well. Something there is null that shouldn't be.

Try adding this before that line:

NSLog.out.appendln("Display Board: " + displayBoard());
NSLog.out.appendln("Image Data: " + uploadedImageData());

And then work back from there.

in the AddEddit.java in the saveChanges() method.

I am following the tutorial...

Gus

On Mar 12, 2008, at 4:57 PM, David LeBer wrote:

On 12-Mar-08, at 5:40 PM, Gustavo Pizano wrote:

Ok i dunno if I understand good, but as for teh 7 tips you post I think I following them, as for the line... well the veogen generated this

public DisplayBoard localInstanceIn(EOEditingContext editingContext) {
  DisplayBoard localInstance = (DisplayBoard)EOUtilities.localInstanceOfObject(editingContext, this);
  if (localInstance == null) {
    throw new IllegalStateException("You attempted to localInstance " + this + ", which has not yet committed.");
  }
  return localInstance;
}

and I guess if I put the new line you suggest I must implement the newDisplayBoard (EOEditingContext) and formt here call the localInstanceIn()method which resieds int he _DisplayBoard class, which it looks for me like a singleton pattern.??

My mistake, in the stock Veogen templates only generate a factory method that takes all of the required attributes:

public static DisplayBoard createDisplayBoard(EOEditingContext editingContext, ...required attributes... ) {
...
}

Just follow the tutorial.

The EOF Commandments are for reference only at this point, just be aware they exist. Both the Veogen templates and Janine's tutorial do the right thing.

;david

--
David LeBer
Codeferous Software
'co-def-er-ous' adj. Literally 'code-bearing'
site:   http://codeferous.com
blog: http://davidleber.net
profile: http://www.linkedin.com/in/davidleber
--
Toronto Area Cocoa / WebObjects developers group:
http://tacow.org

;david

--
David LeBer
Codeferous Software
'co-def-er-ous' adj. Literally 'code-bearing'
site:   http://codeferous.com
blog: http://davidleber.net
profile: http://www.linkedin.com/in/davidleber
--
Toronto Area Cocoa / WebObjects developers group:
http://tacow.org

References:
	>Tutorial (From: Gustavo Pizano <email@hidden>)
	>Re: Tutorial (From: David LeBer <email@hidden>)
	>Re: Tutorial (From: David LeBer <email@hidden>)
	>Re: Tutorial (From: Gustavo Pizano <email@hidden>)
	>Re: Tutorial (From: David LeBer <email@hidden>)