Re: NullPointerEx on adding @Persist to property for parameter "selected" for palette
Hi, The equals() method in Crop was missing alltogether. Implementing it was doing the trick. Thanks a mil! Elisabeth Thiago H. de Paula Figueiredo wrote: Em Thu, 12 Nov 2009 21:26:46 -0200, Elisabeth Adler escreveu: Hi, Hi! I am trying to get a palette working with simple pojos to be displayed in the "available" list. I am working with Tapestry 5.0.11. That's a very old version . . . I get the following NullPointerException: Caused by: java.lang.NullPointerException at org.apache.tapestry.internal.util.SelectModelRenderer.option(SelectModelRenderer.java:49) I've seen this error before when there's some value in the selected list that isn't available in the model. Also make sure the Crop class has a good equals() method. - To unsubscribe, e-mail: users-unsubscr...@tapestry.apache.org For additional commands, e-mail: users-h...@tapestry.apache.org
Re: NullPointerEx on adding @Persist to property for parameter "selected" for palette
Em Thu, 12 Nov 2009 21:26:46 -0200, Elisabeth Adler escreveu: Hi, Hi! I am trying to get a palette working with simple pojos to be displayed in the "available" list. I am working with Tapestry 5.0.11. That's a very old version . . . I get the following NullPointerException: Caused by: java.lang.NullPointerException at org.apache.tapestry.internal.util.SelectModelRenderer.option(SelectModelRenderer.java:49) I've seen this error before when there's some value in the selected list that isn't available in the model. Also make sure the Crop class has a good equals() method. -- Thiago H. de Paula Figueiredo Independent Java, Apache Tapestry 5 and Hibernate consultant, developer, and instructor Owner, software architect and developer, Ars Machina Tecnologia da Informação Ltda. http://www.arsmachina.com.br - To unsubscribe, e-mail: users-unsubscr...@tapestry.apache.org For additional commands, e-mail: users-h...@tapestry.apache.org
NullPointerEx on adding @Persist to property for parameter "selected" for palette
Hi, I am trying to get a palette working with simple pojos to be displayed in the "available" list. I am working with Tapestry 5.0.11. I defined my palette in the tml: selected="selectedCrops"/> I implemented the encoder and model: public Object getCropsEncoder() { return new GenericValueEncoder(manager.getAllCrops(), "name", propertyAccess); } public Object getCropsModel() { return new GenericSelectModel(manager.getAllCrops(), Crop.class, "name", "id", propertyAccess); } I added the property for the selected values: @Property private List selectedCrops; This is working fine. As soon as I now try to actually keep the selected values in the "selected" list by adding @Persist to the property: @Property @Persist private List selectedCrops; I get the following NullPointerException: Caused by: java.lang.NullPointerException at org.apache.tapestry.internal.util.SelectModelRenderer.option(SelectModelRenderer.java:49) at org.apache.tapestry.corelib.components.Palette$SelectedRenderer.render(Palette.java:145) The "available" list is displayed correctly, and the error occurs only when I select some items and move them over to the "selected" list. Any ideas what I am missing? thanks in advance, Elisabeth