[jbossseam-issues] [JBoss JIRA] Commented: (JBSEAM-2469) add postback flag to page actions
Stephen Friedrich (JIRA)
jira-events at lists.jboss.org
Tue May 27 02:29:52 EDT 2008
[ http://jira.jboss.com/jira/browse/JBSEAM-2469?page=comments#action_12414249 ]
Stephen Friedrich commented on JBSEAM-2469:
-------------------------------------------
Thanks Dan.
> Now, if you were to navigate after a postback, either to the same page (redirect) or another page, then it ceases to be classified as a postback at that point.
That was the point I did not understand, but ok, I'll trust you here.
...
Hm, I'd like to understand it, though.
Why is a postback-request suddenly no longer a postback request if it results in rendering of a new page? AFAICS there is no initial request involved either?!
All my pages have a <redirect> in their navigation rules. Will it work in spite of that?
> add postback flag to page actions
> ---------------------------------
>
> Key: JBSEAM-2469
> URL: http://jira.jboss.com/jira/browse/JBSEAM-2469
> Project: Seam
> Issue Type: Feature Request
> Components: Core
> Affects Versions: 2.0.1.CR1
> Reporter: Dan Allen
> Assigned To: Dan Allen
> Fix For: 2.1.0.BETA2
>
> Original Estimate: 1 hour
> Remaining Estimate: 1 hour
>
> Page actions are incredibly useful, but sometimes they can get in the way during a postback. I would like to see a postback attribute added to the <action> tag that can be used to disable the action on postback. It's possible using a conditional, but it is ugly and a lot of typing.
> Here is the logic that would go into Pages.java
> private boolean isPostBack(FacesContext facesContext)
> {
> return facesContext.getExternalContext().getRequestParameterMap().
> containsKey(ResponseStateManager.VIEW_STATE_PARAM);
> }
> The conditional alternative would be:
> <action execute="#{component.action}" if="#{empty param['javax.faces.ViewState']}"/>
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