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https://issues.apache.org/jira/browse/WICKET-2864?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12908475#action_12908475
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Martin Hubert commented on WICKET-2864:
---------------------------------------
Hi Igor,
now i found out that the onDetach() method of the FileUploadField class is the
source of this problem. Unlike other Form Components it removes itself from the
Model.
if (getModel() != null)
{
getModel().setObject(null);
}
if this is a bug we should file a new ticket.
if it is a feature, it should be well documented.
> FileUpload and Wizard
> ---------------------
>
> Key: WICKET-2864
> URL: https://issues.apache.org/jira/browse/WICKET-2864
> Project: Wicket
> Issue Type: Bug
> Components: wicket-extensions
> Affects Versions: 1.4.8
> Environment: ubuntu10.4 / jdk1.6.0_20 / tomcat-6.0.20 / Eclipse 3.5.2
> Reporter: Martin Hubert
> Assignee: Igor Vaynberg
> Attachments: WicketWizardTest.tgz
>
>
> FileUploadField is always null if not in last WizardStep.
> public TestWizard() {
> ...
> model.add(new StepFu());
> model.add(new StepTxt());
> ...
> }
> works, but for
> public TestWizard() {
> ...
> model.add(new StepTxt());
> model.add(new StepFu());
> ...
> }
> the FileUpload ist always null.
> ===
> import java.io.Serializable;
> import org.apache.wicket.extensions.wizard.Wizard;
> import org.apache.wicket.extensions.wizard.WizardModel;
> import org.apache.wicket.extensions.wizard.WizardStep;
> import org.apache.wicket.markup.html.form.TextField;
> import org.apache.wicket.markup.html.form.upload.FileUpload;
> import org.apache.wicket.markup.html.form.upload.FileUploadField;
> import org.apache.wicket.model.CompoundPropertyModel;
> public class TestWizard extends Wizard {
> private static final long serialVersionUID = 1L;
> public TestWizard(String id) {
> super(id);
> TestBean bean = new TestBean();
> setDefaultModel(new CompoundPropertyModel<TestBean>(bean));
> WizardModel model = new WizardModel();
> model.add(new StepFu());
> model.add(new StepTxt());
> init(model);
> getForm().setMultiPart(true);
> }
> public class TestBean implements Serializable {
> private static final long serialVersionUID = 1L;
> private String _text1;
> private FileUpload _fu;
> public String getText1() {
> return _text1;
> }
> public void setText1(String text1) {
> _text1 = text1;
> }
> public FileUpload getFu() {
> return _fu;
> }
> public void setFu(FileUpload fu) {
> _fu = fu;
> }
> }
>
> private final class StepTxt extends WizardStep {
> private static final long serialVersionUID = 1L;
> public StepTxt() {
> add(new TextField<String>("text1"));
> }
> }
>
> private final class StepFu extends WizardStep {
> private static final long serialVersionUID = 1L;
> public StepFu() {
> add(new FileUploadField("fu"));
> }
> }
>
> @Override
> public void onFinish() {
> TestBean bean = (TestBean) getDefaultModelObject();
>
> System.out.println("*******************************************");
> System.out.println("text1: " + bean.getText1());
> System.out.println("fu: " + bean.getFu());
>
> System.out.println("*******************************************");
> setResponsePage(getApplication().getHomePage());
> }
> }
> ===
> Tested with wicket-1.4.7 and wicket-1.4.8
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