Diference between h:commandButton and s:button?

[sachin.parnami]

Hi All,

Would like to know in detail about the functionality, how h:commandButton and s:button works?

have seen the details here

http://docs.jboss.com/seam/2.0.1.GA/reference/en/html_single/#d0e4817

but i am facing some problem while persisting and merging JPA data while using s:button where as if i change s: button to h: commandButton everything works fine.

i get below mentioned error when i use s: button

javax.ejb.EJBTransactionRolledbackException: org.hibernate.PropertyValueException: not-null property references a null or transient value:

where as i tried passing same values which i had passed with h:commandButton

i want to pass some value from my form to action class which i am getting from another form2 by using

#{param.myValue}

now i read h:commandbutton doesn't sopports f:param value so is there any other work around to pass such value

Please guide.

[nickarls]

s:button doesn't submit. Tried using a commandlink with params?

[sachin.parnami]

Thanks for responding Nicklas,

It helps.

[faffinito]

Hi,
if I use a h:commandLink with parameters it seems like no parameters are passed to the page.

This is my personEdit.xhtml

<h:commandButton id="save" value="Salva"
     action="#{personHome.persist}"  styleClass="green left" >
          <f:param name="comeBack" value="#{personHome.comeBack}"/>
</h:commandButton>

In personHome.java i put

@RequestParameter("comeBack")
private String comeBack;

with getters and setters;

In pages.xml

     <page view-id="/personEdit.xhtml" conversation-required="true" no-conversation-view-id="/errorConversationExpired.xhtml">
          <navigation from-action="#{personHome.persist}">
               <rule if-outcome="success">
                    <end-conversation if="#{conversation.nested}" before-redirect="true"/>
                    <redirect view-id="/visitEdit.xhtml" />
               </rule>
          </navigation>
...
</page>

If I use the s:button the redirection is working fine, but I got validation errors since the form is not correctly submitted.
Anyone can help giving some hint?

[daxxy]

You didn't use h:commandLink you used h:commandButton.

f:param does not work with h:commandButton, but don't ask me about passing parameter using h:commandButton because I'm still trying to figure it out!

I read somewhere that h:commandButton can use f:param in JSF 2.0.