Sorry, I will try to be a bit less laconic this time :). You should be
creating a blank Employee to set as the model object. It could be
created from scratch upon each incoming request using a detachable
model (for example, if Employee is not Serializable), or just be a
simple Serializable field of your page or form class with a value
other than null, of course. In the second case you can instantiate the
Employee just once, during page creation, and it will be stored into
the wicket session.
Regards,
Carlos
On 9/10/07, Carlos Pita <[EMAIL PROTECTED]> wrote:
> > private Employee e;
> [...]
> > public LoginForm(final String id) {
> > super(id);
> > setModel(new CompoundPropertyModel(e));
>
> Notice that your model is null.
>
> Regards,
> Carlos
>
> On 9/10/07, Cristina <[EMAIL PROTECTED]> wrote:
> >
> > Hello,
> >
> > I'm trying to set up a simple login page where the password is retrieved
> > from the DB if the username exists. The page is rendered as it should but I
> > get a *WicketMessage: Null object setting value: bsouza with expression:
> > login* when I enter a valid login (bsouza) and his password.
> >
> > Since the code is quite short I'll reproduce it below:
> >
> > public class LoginPage extends JDJStaticPage {
> >
> > private Employee e;
> > private TextField login;
> > private PasswordTextField pword;
> >
> > public LoginPage() {
> > add(new FeedbackPanel("feedback"));
> > add(new LoginForm("form"));
> > }
> >
> > private class LoginForm extends Form {
> >
> > public LoginForm(final String id) {
> > super(id);
> > setModel(new CompoundPropertyModel(e));
> > add(login = new TextField("login"));
> > add(pword = new PasswordTextField("pword"));
> > login.setRequired(true);
> > }
> >
> > protected void onSubmit() {
> > e = (Employee) SERVICE.findEmployeeByLogin(userLogin());
> > if (e != null) {
> > // login is valid...
> > if (userPword().equalsIgnoreCase(e.getPword())) {
> > // password is correct...
> > // setResponsePage(Home.class); // doesn't exist yet...
> > }
> > } else {
> > error("Unable to sign you in."); // shows up in
> > FeedbackPanel?
> > }
> > }
> >
> > private String userLogin() {
> > return (login.getModelObjectAsString());
> > }
> >
> > private String userPword() {
> > return(pword.getModelObjectAsString());
> > }
> > }
> > }
> >
> > Thanks for your help,
> >
> > Cristina
> >
> > --
> > View this message in context:
> > http://www.nabble.com/Setting-up-a-very-simple-login-page-tf4419382.html#a12605286
> > Sent from the Wicket - User mailing list archive at Nabble.com.
> >
> >
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> >
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