How do you pass view parameters when navigating from an action in JSF2

Question

From an action in my bean  I m trying to redirect to another page expecting a view parameter  What is the recommended way to do this in JSF2   E g   say my source page is  http   localhost page1 xhtml  it has a commandButton that calls an action    lt h commandButton value  submit  action    myBean submit     gt    where my bean looks like    ManagedBean  RequestScoped public class MyBean    private int id   public String submit           Does stuff     id   setID        return  success       And now  I want the  submit  action s return to navigate to http   localhost page2 xhtml id 2  I ve tried to do this with a view-param in my navigation case  but with odd results  The faces-config snippet looks like the following    lt navigation-rule gt       lt from-view-id gt  page1 xhtml lt  from-view-id gt       lt navigation-case gt           lt from-outcome gt success lt  from-outcome gt           lt to-view-id gt  page2 xhtml lt  to-view-id gt           lt redirect gt               lt view-param gt                   lt name gt id lt  name gt                   lt value gt   myBean id  lt  value gt               lt  view-param gt           lt  redirect gt       lt  navigation-case gt   lt  navigation-rule gt    The weird behaviour being  even though myBean is set to request scoped  it only calls myBean getId   the first time I load my application  and reuses that same value for all subsequent calls  producing incorrect view parameters for page2   So I m looking for either a better way to do this  or a reason solution for why the view-param is not being requested from my bean each time

User · Answer

Without a nicer solution  what I found to work is simply building my query string in the bean return   public String submit            Do something     return   page2 xhtml faces-redirect true amp id     id      Not the most flexible of solutions  but seems to work how I want it to   Also using this approach to clean up the process of building the query string  http   www warski org blog  p 185

User · Answer

The unintuitive thing about passing parameters in JSF is that you do not decide what to send  in the action   but rather what you wish to receive  in the target page    When you do an action that ends with a redirect  the target page metadata is loaded and all required parameters are read and appended to the url as params   Note that this is exactly the same mechanism as with any other JSF binding  you cannot read inputText s value from one place and have it write somewhere else  The value expression defined in viewParam is used both for reading  before the redirect  and for writing  after the redirect    With your bean you just do    ManagedBean  RequestScoped public class MyBean    private int id   public String submit           Does stuff     id   setID        return  success faces-redirect true amp includeViewParams true         setter and getter for id   If the receiving side has        lt f metadata gt           lt f viewParam name  id  value    myBean id     gt       lt  f metadata gt    It will do exactly what you want

User · Answer

You can do it using Primefaces like this     lt p button        outcome   page2 xhtml faces-redirect true amp amp id   myBean id   gt   lt  p button gt

User · Answer

Just add the seen attribute to redirect tag as below    lt redirect include-view-params  true  gt       lt view-param gt           lt name gt id lt  name gt           lt value gt   myBean id  lt  value gt       lt  view-param gt   lt  redirect gt

User · Answer

A solution without reference to a Bean    lt h button value  login           outcome  content configuration xhtml i 1    gt    In my project I needed this approach    lt h commandButton value  login           action  content configuration xhtml faces-redirect true amp amp i 1     gt

User · Answer

Check out these    http   andyschwartz wordpress com 2009 07 31 whats-new-in-jsf-2  get http   mkblog exadel com 2010 07 learning-jsf2-page-params-and-page-actions    You re gonna need something like    lt h link outcome  success  gt     lt f param name  foo  value  bar   gt   lt  h link gt       and      lt f metadata gt     lt f viewParam name  foo  value    bean foo    gt   lt  f metadata gt    Judging from this page  something like this might be easier     lt managed-bean gt      lt managed-bean-name gt blog lt  managed-bean-name gt      lt managed-bean-class gt com acme Blog lt  managed-bean-class gt      lt managed-property gt         lt property-name gt entryId lt  property-name gt         lt value gt   param  id    lt  value gt      lt  managed-property gt    lt  managed-bean gt

[jsf] How do you pass view parameters when navigating from an action in JSF2?

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