What is the best way to pass an object to another view in JSF?
I have two pages one query and another with the data to edit an object, the query page has a list of objects and each object has the edit button that causes it to redirect to the editing page, I can not send the object and load the edit page. My Bean I'm using ViewScoped.
In other languages it is possible to pass through POST but in java it is a bit complicated I can not adapt. If possible, put a snippet of code.
View Scope ) is dropped whenever navigation from one screen to another occurs.
An alternative is to store the object in the Session scope ( Session Scope ).
You can also pass the object ID a URL parameter or Flash Scope and then load it again on the destination page.
Setting the object in Flash Scope
String str = "teste";
FacesContext.getCurrentInstance().getExternalContext().getFlash().put("teste", str);
In the other Bean create a method and use @PostConstruct annotation.
@PostConstruct
public void init() {
String strAux = (String) FacesContext.getCurrentInstance().getExternalContext().getFlash().get("teste");
}
You can pass a List.
FacesContext.getCurrentInstance().getExternalContext().getFlash().put(LISTA_STRING, listaString);
@PostConstruct
public void init() {
List<String> listaString = (List<String>) FacesContext.getCurrentInstance().getExternalContext().getFlash().get(LISTA_STRING);
}