SetPropertyListener Problem when using with af:commandButton in oracle adf - oracle-adf

Question

Hi I want to set a pageflowScope using setPropertyListener and when I use that in h:commandButton it works but when I use that in af:commandButton and when I hit the button it does not work but the second time I hit the button it works ... when I hit the button at the first time it should put the method result into a pageflowScope variable but it always do that in the second click ... I don't know why
here is my code
<af:panelFormLayout id="pfl2">
<af:inputText value="#{bindings.usrname.inputValue}" label="نام کاربری"
required="#{bindings.usrname.hints.mandatory}"
columns="#{bindings.usrname.hints.displayWidth}"
maximumLength="#{bindings.usrname.hints.precision}"
shortDesc="#{bindings.usrname.hints.tooltip}" id="it1">
<f:validator binding="#{bindings.usrname.validator}"/>
</af:inputText>
<af:inputText value="#{bindings.passwrd.inputValue}" label="رمزعبور"
required="#{bindings.passwrd.hints.mandatory}"
columns="#{bindings.passwrd.hints.displayWidth}"
maximumLength="#{bindings.passwrd.hints.precision}"
shortDesc="#{bindings.passwrd.hints.tooltip}" id="it2">
<f:validator binding="#{bindings.passwrd.validator}"/>
</af:inputText>
<af:button actionListener="#{bindings.execPLSQLProcedure.execute}" text="execPLSQLProcedure"
disabled="#{!bindings.execPLSQLProcedure.enabled}" id="b1">
<af:setPropertyListener from="#{bindings['return'].inputValue}"
to="#{pageFlowScope.Result}" type="action"/>
</af:button>
</af:panelFormLayout>
how can I fix it or please tell me an alternative way ...thanks

Answer 1

If you have to click two times for the action to trigger it is because on your first click your form hit data validation issues.
1) If you don't see it, you first need to add a partialTrigger to your button :
<af:commandButton partialTriggers="pfl2" partialSubmit="true" actionListener="#{bindings.execPLSQLProcedure.execute}" text="execPLSQLProcedure" disabled="#{!bindings.execPLSQLProcedure.enabled}" id="b1" >
<af:setPropertyListener from="#{bindings['return'].inputValue}" to="#{pageFlowScope.Result}" type="action"/>
</af:button>
whether the action should be done through a partial page submit or
not. Default is false: no partial page submit; the full page will be
refreshed. When set to true, the full page will not be refreshed. To
re-render specific components on your page in response to the partial
page submit, you have to tell ADF Faces. The easiest way to do this is
with the partialTriggers attribute.
2) If you want to bypass validation you can also add an immediate="true" attribute. In your case it doesn't look like you should as you want to validate the password length and requirement. See 1)
<af:commandButton immediate="true" partialTriggers="pfl2" partialSubmit="true" actionListener="#{bindings.execPLSQLProcedure.execute}" text="execPLSQLProcedure" disabled="#{!bindings.execPLSQLProcedure.enabled}" id="b1" >
<af:setPropertyListener from="#{bindings['return'].inputValue}" to="#{pageFlowScope.Result}" type="action"/>
</af:button>
see docs : https://docs.oracle.com/cd/E12839_01/apirefs.1111/e12419/tagdoc/af_commandButton.html
whether data validation - client-side or server-side - will be skipped
when events are generated by this component. When immediate is true,
the command's action and ActionListeners, including the default
ActionListener provided by the JavaServer Faces implementation, will
be executed during Apply Request Values phase of the request
processing lifecycle, rather than waiting until the Invoke Application
phase. Because validation runs during Process Validators (after Apply
Request Values, but before Invoke Application), setting immediate to
true will skip validation.