Hi Pedro, with your condition inside the renderer you've beaten me by originality ;).
But I doubt that the choice will be able to store the selected DTO in the entity's String property.
Sven Pedro Santos wrote:
Hi Sven, he stell can write some specialized render... but I think the best way is you have your depid property of type Department. Than all this thread would not have started :) class YourCustomRender { @Override public String getIdValue(Object object, int index) { if (object instanceof DTO) { return ((DTO)object).getDeptId() } else { return (String)object;//already is the depid string } } @Override public Object getDisplayValue(Object object) { if (object instanceof DTO) { return ((DTO)object).getDescription(); } else { return contextData.getDTOBasedOnDepid(object); } } } On Wed, Nov 4, 2009 at 1:29 PM, Xavier López <xavil...@gmail.com> wrote:Hi, I have a question regarding the use of RadioChoice and ChoiceRenderer's in conjunction with CompoundPropertyModel. I'm new to Wicket (but already a convinced user ;) ), so maybe my approach on this one is not at all as it should be... Any comments are welcome ! I'll get into details. Let's say I have a class in my domain model named Person. This entity has a property named 'deptId' of type String. The Person entity is the backing for a CompundPropertyModel applied to the whole form. The 'deptId' field is inputted by the user, let's say, by means of a RadioChoice (I guess it makes no difference from a DropDownChoice taking into account the point of the question). The choice list for the RadioChoice component is a List made up of DTO objects with properties "id" and "description". To ensure proper rendering of labels, I use a suitable ChoiceRenderer. Now, problems come when the 'deptId' property has a value in the Person entity used in the CompoundPropertyModel. I get an error saying that class String does not have any property called 'id' (I suppose this error comes from having a ModelObject of type String and also having a ChoiceRenderer refering to 'id' property). I'll provide some sample code: markup ------------- ... <form wicket:id="form"> ... <span valign="top" wicket:id="deptId"></span> ... </form> ... Java ------------- ... List<SimpleElementDTO> choices = contextData.getChoices(); Person p = new Person(...); Form f = new Form("form"){...}; f.setModel(new CompoundPropertyModel(p)); ChoiceRenderer cr = new ChoiceRenderer("deptId", choices, new ChoiceRenderer("id", "description")); f.add(cr); ... I suppose the 'normal' way of doing things would be providing a custom Model to 'cr', but I'd like to know if there is a possibility to achieve this point still using CompoundPropertyModel... The stack trace I get is the following: WicketMessage: No get method defined for class: class java.lang.String expression: id Root cause: org.apache.wicket.WicketRuntimeException: No get method defined for class: class java.lang.String expression: id at org.apache.wicket.util.lang.PropertyResolver.getGetAndSetter(PropertyResolver.java:440) at org.apache.wicket.util.lang.PropertyResolver.getObjectAndGetSetter(PropertyResolver.java:282) at org.apache.wicket.util.lang.PropertyResolver.getValue(PropertyResolver.java:91) at org.apache.wicket.markup.html.form.ChoiceRenderer.getIdValue(ChoiceRenderer.java:140) at org.apache.wicket.markup.html.form.AbstractSingleSelectChoice.getModelValue(AbstractSingleSelectChoice.java:144) at org.apache.wicket.markup.html.form.FormComponent.getValue(FormComponent.java:797) at org.apache.wicket.markup.html.form.RadioChoice.onComponentTagBody(RadioChoice.java:407) at org.apache.wicket.Component.renderComponent(Component.java:2480) at org.apache.wicket.MarkupContainer.onRender(MarkupContainer.java:1411) at org.apache.wicket.Component.render(Component.java:2317) at org.apache.wicket.MarkupContainer.renderNext(MarkupContainer.java:1297) ...
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