Form submit in conditionally rendered component is not processed

Question

I have a custom tagfile with a form:

Answer 1

Your concrete problem is caused by 2 facts:

1. When JSF needs to decode a form submit action or a submitted input value, then it also checks if the component is rendered or not (as safeguard against hacked/tampered requests).
2. Request scoped beans are recreated on every HTTP request (an ajax request counts also as one request!).

In your specific case, the rendered condition has evaluated false while JSF needs to decode the form submit action and therefore the non-rendered input/command components are never processed.

Putting the bean in view scope should fix it. Below example assumes JSF 2.x.

import javax.faces.bean.ManagedBean;
import javax.faces.bean.ViewScoped;

@ManagedBean
@ViewScoped

And below example assumes JSF 2.2+ with CDI:

import javax.inject.Named;
import javax.faces.view.ViewScoped;

@Named
@ViewScoped

Or, if the techncial requirement is to keep the bean in request scope, then carry around the condition behind rendered attribute in a <o:inputHidden>. Adjust your snippet to include it in the <h:form>.

<o:inputHidden value="#{backingTest.flag}" />

See also:

• commandButton/commandLink/ajax action/listener method not invoked or input value not set/updated - point 6
• How to choose the right bean scope?