4 Replies Latest reply on Mar 18, 2008 9:55 PM by keithnaas

Constructing s:link or s:button action dynamically

brombie.wanch.akewan.com Mar 18, 2008 6:16 PM

Hi everyone,

Is there a way to construct the action inside an s:button or s:link dynamically?

For example, I want to do something like the code below to create a new Fruit based on a Seed. The code doesn't work since seedHome.instance.id is not getting evaluated and have its value rendered.

<s:button   
    action="#{fruitHome.createNew(seedHome.instance.id)}"
    id="createFruit" 
    view="/Fruit.xhtml"
    value="Create New Fruit Based">          
</s:button>

Is there a way to construct the action for a link/button either during render time, or through a javascript on the browser side?

thanks!

1. Re: Constructing s:link or s:button action dynamically

keithnaas Mar 18, 2008 6:52 PM (in response to brombie.wanch.akewan.com)

See FaceletsParamForActionMethod for the same question yesterday.
Actions
2. Re: Constructing s:link or s:button action dynamically

keithnaas Mar 18, 2008 7:00 PM (in response to brombie.wanch.akewan.com)
That was the wrong topic, I'm trying to find the right one....but
in the meantime.

The action string

#{fruitHome.createNew(seedHome.instance.id)}

is not evaluated and rendered in the page as a string of the form fruitHome.createNew(10). Instead the raw action expression is checked against raw action expressions defined in navigation rules. So if you have a navigation rule that says

<navigation from-action="#{fruitHome.createNew(seedHome.instance.id)}"/>

then that navigation rule will be executed.
Actions
3. Re: Constructing s:link or s:button action dynamically

brombie.wanch.akewan.com Mar 18, 2008 9:45 PM (in response to brombie.wanch.akewan.com)

Thanks for the pointer. I found some JIRA tickets dated back in 2006 about seam supporting passing object as parameters on action but looks like it's dropped now. I've changed the s:link approach and opted for the more traditional approach through conditional action in the page.xml.
Actions
4. Re: Constructing s:link or s:button action dynamically

keithnaas Mar 18, 2008 9:55 PM (in response to brombie.wanch.akewan.com)

It is still possible to pass objects as parameters to actions. The issue is that the navigation rule has to 100% match the same string action expression in the views.

There is an FAQ entry as well.
Actions

Go to original post