can navigation from-action method have parameters?

[shin0135]

Hi,

I have the following navigation block in my pages.xml

        <navigation from-action="#{someBean.showDetails}">
            <redirect view-id="/details.xhtml" />
        </navigation>

The above works fine.

However, when I changed the method showDetails to take a parameter like

        <navigation from-action="#{someBean.showDetails(rowIndex)}">
            <redirect view-id="/details.xhtml" />
        </navigation>

the redirect doesn't work. To get around this, I changed the method showDetails to return a string like

    public String showDetails(final String rowIndex) {

        // do something here

        return "/details.xhtml";
    }

Can this be done in navigation from-action?

Thanks for your help in advance!

[pjot]

Hi James, normlly it works perfectly, if you use parameters in the action expression. One can even call the action method dynamically on some SEAM/JSF component:

call the action

<a4j:commandLink action="#{actionHandler[actionHandler.selectedAction]}"/>

and navigate with

<navigation from-action="#{actionHandler[actionHandler.selectedAction]}">
..
</navigation>

In your case the question is rather: are you sure the rowIndex is of type String? I guess, the EL expression

#{someBean.showDetails(rowIndex)}

doesnt get evaluated to the method

showDetails(final String rowIndex) 

And by the way, i would recommend a very nice book Seam In Action by Dan Allen, Chapter 2.5.1, where u can find very usefull info about drill downs.

[shin0135]

Pjot,

Yes, I'm positive the rowIndex is type String. I have a rich:dataTable like

<rich:dataTable id="d1" rowKeyVar="rowIndex">
...
</rich:dataTable>

I could have used @DataModelSelection for a selected row from the rich:dataTable, but I'm trying to not use @DataModelSelection. To achieve that, I came up with an idea of passing a row index when a user clicks an a4j:commandLink 'showDetails'. So, my a4j:commandLink looks like

<a4j:commandLink id="l1" action="#{someBean.showDetails(rowIndex)}" value="Details" />

In my showDetails method, I could see rowIndex is passed correctly.

Odd, why the navigation doesn't work in pages.xml.