Max Katz

I have seen this question more than once now, how do you add/delete a row in a table? Turns out it’s pretty simple. Although you can’t do partial table update which RichFaces supports, when adding or deleting a row, jut render the entire table. This will also work with a standard JSF table. Also, a related post is How to delete a row in JSF. RichFaces 3.3.3 is used.

The page looks like this:

JSF page:

Managed bean:

@KeepAlive
public class Bean {
   private List list;

   @PostConstruct
   public void init() {
      list = new ArrayList();
      list.add(1);
      list.add(2);
      list.add(3);
   }
   public void remove() {
      // remove last
      if (!list.isEmpty()) {
         list.remove(list.size() - 1);
      }
   }
   public List getList() {
      return list;
   }
   public void add() {
      list.add(list.size()+1);
   }
}

The only thing to mention is that @KeepAlive gives us view scope. This way we can keep the same bean between requests. More on view scope in RichFaces.

JSF configuration file:

  bean
  org.richfaces.example.Bean
  request

That’s it.