ZK ComboBox onchange changes all comboboxes in the listbox

Question

I have an issue with a listbox and the combobox behaviour. I have a listbox with a group of rows and I try to edit inline and change the value of a field based on the values of a combobox. But when I select one value in the combo of one row then all the values of the comboboxes of the other rows change to the same value. Please, let me know what I am doing wrong. Thanks for your help!

Here is my code:

            <template name="model" var="item">
                <listitem >
                    <listcell label="@load(item.id)"/>  
                    <listcell label="@load(item.descCodigoTrafico)"/>              
                    <listcell label="@load(item.descAmbitoDeTrafico)"/>
                    <listcell>
                        <combobox 
                            model="@load(vm.listaPrecioEspecial)" 
                            onChange="@command('addToUpdate', entry=item)"
                            selectedItem="@load(item.precioEspecial) @save(item.precioEspecial, before='updateItems')">
                            <template name="model" var="el">
                                <comboitem label="@load(el)"/>
                            </template>
                        </combobox>
                    </listcell>
                    <listcell label="@load(item.tipoDescuento)" />
                    <listcell>
                        <decimalbox inplace="true" 
                        value="@load(item.ppm) @save(item.ppm, before='updateItems')"
                        onChange="@command('addToUpdate', entry=item)" 
                        format="#.0000"/>
                    </listcell>
                </listitem>
            </template>

And the code of the two methods in de VM:

    @Command
public void addToUpdate(@BindingParam("entry") TblEscenarioCondTrafico item){
    itemsToUpdate.add(item);
    LOGGER.info(item.toString());
    for(TblEscenarioCondTrafico i : itemsToUpdate){
        LOGGER.info("Item a guardar " + i.toString());
        //LOGGER.info("Elemento...");
    }
}

@NotifyChange("listaTraficos")
@Command
public void updateItems() throws Exception{
    EscenarioCondTraficoService ects = new EscenarioCondTraficoService(em);
    for (TblEscenarioCondTrafico i : itemsToUpdate){
        LOGGER.info("Guardando " + i.toString());
        ects.save(i);
    }
    itemsToUpdate.clear();
    listaTraficos = getListaTraficos();
}

Answer 1

The problem should be that

model="@load(vm.listaPrecioEspecial)"

sets the same Collection to every Combobox as its model and so it is bound to all Combobox instances.