Can I update a JSF component from a JSF backing bean method

Question

Is there a way to have a JSF Backing bean cause an update of a component on the page  I am not looking to use an ajax component with update attribute to update a component on the page  I need to trigger an update from within a JSF backing bean method  Note the update on the page can happen after this method completes or prior to its completion  I am using PrimeFaces  if there is a solution that can be had from using PrimeFaces

User · Answer

Everything is possible only if there is enough time to research :)

What I got to do is like having people that I iterate into a ui:repeat and display names and other fields in inputs. But one of fields was singleSelect - A and depending on it value update another input - B. even ui:repeat do not have id I put and it appeared in the DOM tree

<ui:repeat id="peopleRepeat"
value="#{myBean.people}"
var="person" varStatus="status">

Than the ids in the html were something like:

myForm:peopleRepeat:0:personType
myForm:peopleRepeat:1:personType

Than in the view I got one method like:

<p:ajax event="change"
listener="#{myBean.onPersonTypeChange(person, status.index)}"/>

And its implementation was in the bean like:

String componentId = "myForm:peopleRepeat" + idx + "personType";
PrimeFaces.current().ajax().update(componentId);

So this way I updated the element from the bean with no issues. PF version 6.2

Good luck and happy coding :)

User · Answer

Using standard JSF API  add the client ID to PartialViewContext getRenderIds     FacesContext getCurrentInstance   getPartialViewContext   getRenderIds   add  foo bar      Using PrimeFaces specific API  use PrimeFaces Ajax update     PrimeFaces current   ajax   update  foo bar      Or if you re not on PrimeFaces 6 2  yet  use RequestContext update     RequestContext getCurrentInstance   update  foo bar      If you happen to use JSF utility library OmniFaces  use Ajax update     Ajax update  foo bar      Regardless of the way  note that those client IDs should represent absolute client IDs which are not prefixed with the NamingContainer separator character like as you would do from the view side on

User · Answer

The RequestContext is deprecated from Primefaces 6 2  From this version use the following   if  componentID    null  amp  amp  PrimeFaces current   isAjaxRequest          PrimeFaces current   ajax   update componentID       And to execute javascript from the backbean use this way   PrimeFaces current   executeScript jsCommand     Reference    https   github com primefaces primefaces wiki Migration-Guide https   forum primefaces org viewtopic php t 53129

User · Answer

I also tried to update a component from a jsf backing bean class  You need to do the following after manipulating the UI component   FacesContext getCurrentInstance   getPartialViewContext   getRenderIds   add componentToBeRerendered getClientId      It is important to use the clientId instead of the  server-side  componentId

[jsf-2] Can I update a JSF component from a JSF backing bean method?

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