Improved to not fail with NPE with https://issues.apache.org/jira/browse/WICKET-5601
I think Wicket should warn you somehow when the returned idValue is null though. Because now it sets null as a model object and the client choice is being lost. @Sven, @Igor: what do you think ? Martin Grigorov Wicket Training and Consulting On Sun, May 25, 2014 at 10:29 PM, Francois Meillet < francois.meil...@gmail.com> wrote: > When the DropDownChoice try to convert the submitted choice id back to the > choice object > there is an iteration over the choices. > You get the NPE in this iteration because nullItem has no id. > > Have a look to AbstractSingleSelectChoice's setNullValid(true) method to > include a null value. > > http://ci.apache.org/projects/wicket/apidocs/6.x/org/apache/wicket/markup/html/form/AbstractSingleSelectChoice.html#setNullValid(boolean) > > > > François Meillet > Formation Wicket - Développement Wicket > > > > > > Le 25 mai 2014 à 21:18, Marco Springer <ma...@glitchbox.nl> a écrit : > > > Haven't run the code but my guess is that the idValue returns a null > instead > > of "0". > > Take a look at > AbstractSingleSelectChoice.convertChoiceIdToChoice(String) line > > 281. (Wicket 6.15.0) > > "if(renderer.getIdValue(choice, index).equals(id)" > > This would trigger a NPE if a null is returned, which would be the case > with > > your "nullItem". > > > > Cheers, > > Marco > > > > On Sunday 25 May 2014 21:06:41 Lucio Crusca wrote: > >> I'm pretty sure it's my fault, but I can't spot it. I'm trying to use a > >> DropDownChoice with custom renderer and a PropertyModel, without a Form. > >> > >> I get a NullPointerException in AbstractSingleSelectChoice, here is the > >> quickstart: > >> > >> http://www.sulweb.org/download/sparsi/quickstart.zip > >> > >> --------------------------------------------------------------------- > >> To unsubscribe, e-mail: users-unsubscr...@wicket.apache.org > >> For additional commands, e-mail: users-h...@wicket.apache.org > > > > --------------------------------------------------------------------- > > To unsubscribe, e-mail: users-unsubscr...@wicket.apache.org > > For additional commands, e-mail: users-h...@wicket.apache.org > > > >
