[jbossseam-issues] [JBoss JIRA] Commented: (JBSEAM-2469) add postback flag to page actions
[ http://jira.jboss.com/jira/browse/JBSEAM-2469?page=comments#action_12414253 ]
Dan Allen commented on JBSEAM-2469:
-----------------------------------
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?!
Only if you use <redirect>. If you use <render>, then it is still a postback.
However, the page action will not be invoked on the view ID that you <render>. The
page action will only be executed at the start of the postback (so the current view ID).
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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