Re: NPE in AbstractSingleSelectChoice
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 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 > > > >
Re: NPE in AbstractSingleSelectChoice
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 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 >
Re: NPE in AbstractSingleSelectChoice
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
NPE in AbstractSingleSelectChoice
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
