Simple question from an not-noob developer

[beligum]

Hi all,

Quick question I've been stuggling with for a day now:

I have a page that uses an outjected variable/bean.
That variable is set by an action bean after selection from a list.
However, when a user accesses the target page directly, without going through the selection page, that variable will be null (normal behaviour indeed).

Now, is there a way to redirect the user to the selection-page when this happens?
I could do this in a page-action method, but the problem is that the target page is restricted (in pages.xml) :

<page view-id="/showSpace.xhtml">
 <restrict>#{s:hasPermission('space', 'view', selectedSpaceInstance)}</restrict>
</page>

The outjected variable in question here is selectedSpaceInstance, and the restriction-check crashes when it is null, throwing this exception:

javax.el.PropertyNotFoundException: ELResolver cannot handle a null base Object with identifier 'selectedSpaceInstance'

even before any page-action is invoked.

Seems like something simple to me, usually done in pages.xml, but I can't seem to find a solution.

any help is, of course, welcome.

b.

[delphi'sghost]

As a really big stab in the dark, how about :

<page view-id="/showSpace.xhtml">
 <restrict>#{not selectedSpaceInstance = null}</restrict>
</page>

I'm not even sure if this is the correct syntax, but I'm sure you get the idea. If this doesn't work, you could always have a bean method called hasSelectedSpaceInstance which checks if the seam var is null

[beligum]

Yeah, I thought that too, but it doesn't work at all, same exception.
I moved everything (including security) to a page-action, but it's a shame, because, if you ask me, it doesn't belong there.

[gavin.king]

Try "not empty selectedSpaceInstance"

[beligum]

This worked, thanks Gavin.
But is there no possibility to do the redirect from the page if the variable is empty?

[gavin.king]

I dont understand the question.