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https://issues.apache.org/jira/browse/ISIS-691?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Dan Haywood resolved ISIS-691.
------------------------------
Resolution: Fixed
> In Wicket viewer, improve drop-down list's handling of null entity or values
> ----------------------------------------------------------------------------
>
> Key: ISIS-691
> URL: https://issues.apache.org/jira/browse/ISIS-691
> Project: Isis
> Issue Type: Bug
> Components: Archetype: ToDoApp WRJ, Core, Viewer: Wicket
> Affects Versions: archtype-quickstart-wrj-1.3.1, viewer-wicket-1.3.1,
> core-1.3.0
> Reporter: Dan Haywood
> Assignee: Dan Haywood
> Fix For: archetype-quickstart-wrj-1.4.0, viewer-wicket-1.4.0,
> core-1.4.0
>
>
> Several issues:
> 1. for entities, if the reference is null, the drop-down
> (EntityLinkSelect2Panel) always shows the first object in edit mode
> 2. for value types (eg enums), it is not possible to set a null value (!)
> ~~~
> To replicate (1) add the following property to the simple archetype's
> SimpleObject class:
> // //////////////////////////////////////
> // other (property)
> // //////////////////////////////////////
> private SimpleObject other;
> @Column(allowsNull="true")
> @MemberOrder(sequence = "1")
> // @Mandatory
> public SimpleObject getOther() {
> return other;
> }
> public void setOther(final SimpleObject other) {
> this.other = other;
> }
> public List<SimpleObject> choicesOther() {
> List<SimpleObject> list = container.allInstances(SimpleObject.class);
> return list;
> }
> ~~~
> To replicate (2),
> ToDoItem
> @javax.jdo.annotations.Column(allowsNull="true")
> public Subcategory getSubcategory() {
> and
> ToDoItemContributions
> public ToDoItem updateCategory(
> final ToDoItem item,
> final @Named("Category") Category category,
> final @Optional @Named("Subcategory") Subcategory subcategory) {
> ...
> }
> and
> public static enum Category {
> Professional {
> @Override
> public List<Subcategory> subcategories() {
> return Arrays.asList(null, Subcategory.OpenSource,
> Subcategory.Consulting, Subcategory.Education);
> }
> }, Domestic {
> @Override
> public List<Subcategory> subcategories() {
> return Arrays.asList(null, Subcategory.Shopping,
> Subcategory.Housework, Subcategory.Garden, Subcategory.Chores);
> }
> }, Other {
> @Override
> public List<Subcategory> subcategories() {
> return Arrays.asList(null, Subcategory.Other);
> }
> };
>
> public abstract List<Subcategory> subcategories();
> }
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