If you can try something like this to get a fresh instance of the desired page.
@InjectPage("NameOfMyPage")
public abstract MyPage getMyPage();
With the instance acquired by this method you can do something like this
(pseudo code):
IPage page = getMyPage();
....
Use the page instance to get the validation delegate of it and register your
error against it.
....
getRequestCylce.activate( page );
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-----Ursprüngliche Nachricht-----
Von: Kolesnikov, Alexander GNI [mailto:[EMAIL PROTECTED]
Gesendet: Donnerstag, 22. März 2007 13:32
An: Tapestry users
Betreff: [T4] PageRedirectException
I am using contrib:Table to display the results of a search. If a search
returns zero results, I want to treat this as an error and to show the search
form again with this error in the same way as if it was a faulty user input
validation.
It seems to me that a good solution to throw a PageRedirectException at the
moment when the Table component receives a source with 0 records in it. I have
tried to do this in the method that provides the model for the page, like so:
public IBasicTableModel getModel() {
// some code to prepare the model
if (model.getRowCount() == 0) {
throw new PageRedirectException("Search");
}
return model;
}
But in this case the PageRedirectException was not caught by Tapestry but
propagated.
Another attempt was to override the renderComponent() method of the Table
component, like so:
protected void renderComponent(IMarkupWriter writer, IRequestCycle
cycle) {
if (getSource().getRowCount() == 0) {
throw new PageRedirectException("Search");
}
super.renderComponent(writer, cycle);
}
This seems to work when redirecting to a different page. However, I want to
redirect to the same page because the search form and the table of results are
simply two views of the same page, shown or hidden by If components as needed.
And when I am trying to redirect to the same page, again, PageRedirectException
is not caught but propagated, and the application crashes.
Does anybody know, why PageRedirectException is sometimes caught but at other
times propagated and what to do about this? Or maybe you can see a different
solution for my problem?
Thanks,
Alex
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