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Posted to users@wicket.apache.org by rpalacios <ro...@gmail.com> on 2013/06/01 21:54:00 UTC
A child with id 'XXXX' already exist AND class constructor called
twice issue
Hi everyone.
I am a little new on Wicket, and I have googling this problem a lot of time.
I have 3 or 4h try to solve this exception:
java.lang.IllegalArgumentException: A child with id 'eventos' already exists
But as you can see on code below, I am adding just a ListView component.
I ran this code step by step and I am noting that class constructor is
called twice. I don't know why, I am guess that the problem have to be with
that behaviour.
I am using wicket 6.7.0 on tomcat 7. Running on Windows 8.
Could you help me to solve this problem?
*This is the HTML code:*
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en"
xmlns:wicket="http://wicket.apache.org/dtds.data/wicket-xhtml1.4-strict.dtd">
<wicket:head>
<link rel="stylesheet" type="text/css" href="tables.css"/>
<link rel="stylesheet" type="text/css" href="correos.css"/>
<link rel="stylesheet" type="text/css" href="ofertasPage.css"/>
</wicket:head>
<body>
<wicket:extend>
<div id="main">
<div id="leftside">
<div class="grupo">
Eventos
<wicket:link> Nueva evento <EventoPage.html>
</wicket:link>
Nombre
Tipo
Correo
Inicio de recepción
Cierre de recepción
Cierre de recepción
Pedro Marcano
Pedro Marcano
0412/342-30-58
0412/342-30-58
0412/342-30-58
<images/preview-5.png>
<images/edit-9.png>
<wicket:link> Nuevo evento <EventoPage.html>
</wicket:link>
</div>
</div>
</div>
</wicket:extend>
</body>
</html>
*And this is the class constructor*
public EventosPage() {
LoadableDetachableModel<List<Evento>> ldm = new
LoadableDetachableModel<List<Evento>>() {
@Override
protected List<Evento> load() {
return Evento.getAll();
}
};
add(new ListView<Evento>("eventos", ldm) {
@Override
protected void populateItem(ListItem<Evento> item) {
Evento ev = item.getModelObject();
CompoundPropertyModel<Evento> cpm = new
CompoundPropertyModel<>(ev);
item.add(new Label("nombre", cpm));
item.add(new Label("tipo.nombre", cpm));
item.add(new Label("correo", cpm));
item.add(new Label("inicioRecepcion", cpm));
item.add(new Label("finRecepcion", cpm));
item.add(new BookmarkablePageLink("ver", EventoPage.class));
item.add(new BookmarkablePageLink("editar",
EventoPage.class));
}
});
Thanks in advance,
Roger
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Re: A child with id 'XXXX' already exist AND class constructor
called twice issue
Posted by Paul Bors <pa...@bors.ws>.
See the Wicket free guide section section 11.2 Component ListView
http://wicket.apache.org/learn/books/freeguide.html
I also don't see your HTML markup for the wicket:id="eventos" so I'm not
sure how you got to add it at least once?
-----
~ Thank you,
Paul@Bors.ws
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