I am basing my example on the PrimeFaces showcase example for the p:dataTableContextMenu example
The difference being I am trying to delete via a p:confirmDialog but the selected item is always null.
Here's a cut down example
The XHTML
<!DOCTYPE html>
<html xmlns="http://www.w3c.org/1999/xhtml"
xmlns:f="http://java.sun.com/jsf/core"
xmlns:h="http://xmlns.jcp.org/jsf/html"
xmlns:p="http://primefaces.org/ui"
xmlns:ui="http://java.sun.com/jsf/facelets">
<h:head>
<title>Example</title>s
</h:head>
<h:body>
<h:form>
<p:confirmDialog widgetVar="cd" severity="alert" header="Confirmation"
message="Are you sure you wish to delete this car?">
<p:commandButton value="Yes" action="#{carTableView.deleteCar}"
update=":dataForm" oncomplete="PF('cd').hide();" />
<p:commandButton value="No" onclick="PF('cd').hide();" type="button" />
</p:confirmDialog>
</h:form>
<h:form id="dataForm">
<p:contextMenu for="cars">
<p:menuitem value="Delete" icon="ui-icon-close"
onclick="PF('cd').show(); return false;" />
<!-- action="#{formsView.deleteForm}" update=":dataForm" /> -->
</p:contextMenu>
<p:dataTable id="cars" var="car" value="#{carTableView.cars}"
rowKey="#{car.id}" selection="#{carTableView.selectedCar}"
selectionMode="single">
<f:facet name="header">
RightClick to View Options
</f:facet>
<p:column headerText="Id">
<h:outputText value="#{car.id}" />
</p:column>
<p:column headerText="Name">
<h:outputText value="#{car.name}" />
</p:column>
</p:dataTable>
</h:form>
</h:body>
</html>
The Model
public class Car
{
private String id;
private String name;
public Car(String id, String name)
{
this.id = id;
this.name = name;
}
public String getId()
{
return id;
}
public void setId(String id)
{
this.id = id;
}
public String getName()
{
return name;
}
public void setName(String name)
{
this.name = name;
}
}
And the bean
import java.io.Serializable;
import java.util.ArrayList;
import java.util.List;
import java.util.UUID;
import javax.annotation.PostConstruct;
import javax.faces.bean.ManagedBean;
import javax.faces.bean.ViewScoped;
#SuppressWarnings("serial")
#ManagedBean
#ViewScoped
public class CarTableView implements Serializable
{
private List<Car> cars;
private Car selectedCar;
#PostConstruct
public void init()
{
cars = createCars();
}
private List<Car> createCars()
{
List<Car> list = new ArrayList<Car>();
for (int i = 0; i < 10; i++)
{
list.add(new Car(UUID.randomUUID().toString().substring(0, 8), "Car " + String.valueOf(i + 1)));
}
return list;
}
public void deleteCar()
{
cars.remove(selectedCar);
selectedCar = null;
}
public List<Car> getCars()
{
return cars;
}
public void setCars(List<Car> cars)
{
this.cars = cars;
}
public Car getSelectedCar()
{
return selectedCar;
}
public void setSelectedCar(Car selectedCar)
{
this.selectedCar = selectedCar;
}
}
Now it seems to me that it's the involvement of running the deleteCar action from the p:confirmDialog that is the issue.
I say this as if I change
<p:menuitem value="Delete" icon="ui-icon-close"
onclick="PF('cd').show(); return false;" />
To
<p:menuitem value="Delete" icon="ui-icon-close"
action="#{formsView.deleteForm}" update=":dataForm" />
Then it works. In the p:confirmDialog example the selectedCar in the deleteCar method is always null. Despite specifying a rowKey attribute in p:dataTable
Since you have two forms, enclose <h:setPropertyActionListener > to your <p:menuitem>
Answer: The p:confirmDialog needs to be part of the same h:form as the p:dataTable
Related
I have two dropdowns: One is implemented using a selectOneMenu component and the other is implemented with selectCheckboxMenu.
When selecting an option in the selectOneMenu, the option values of the selectCheckboxMenu are updated depending of what option was selected in the selectOneMenu.
The following scenario happens:
I select an option of the selectOneMenu, the selectCheckboxMenu gets populated
I select/check some options of the selectCheckboxMenu
I select another option of the selectOneMenu, the selectCheckboxMenu gets populated with other values
I select some of the new values
I select the option in step 1 of the selectOneMenu
The values I selected in step 2 are no longer selected
I believe this is because the list value bound to the selectCheckboxMenu is getting reset by the setter method.
What I would like is for the state of the selectCheckboxMenu to be globally saved. What would be the best strategy for doing this?
EDIT:
Here's the relevant code that duplicates the previous behavior:
Bean:
import javax.annotation.PostConstruct;
import javax.faces.bean.ManagedBean;
import javax.faces.bean.ViewScoped;
import javax.inject.Inject;
import java.util.ArrayList;
import java.util.List;
#ManagedBean
#ViewScoped
public class BackingBean {
private List<Parent> parents = new ArrayList<>();
private List<Child> children = new ArrayList<>();
private List<Child> selectedChildren = new ArrayList<>();
private Parent selectedParent = new Parent();
#Inject
FamilyService service;
#PostConstruct
public void init(){
parents = service.findParents();
}
public void parentChanged(){
children = new ArrayList<>();
if(getSelectedParent() == null){
return;
}
children = service.findChildrenByParent(getSelectedParent());
}
public void selectedSonChanged(){
System.out.println(selectedChildren.size());
}
public List<Parent> getParents() {
return parents;
}
public void setParents(List<Parent> parents) {
this.parents = parents;
}
public List<Child> getChildren() {
return children;
}
public void setChildren(List<Child> children) {
this.children = children;
}
public List<Child> getSelectedChildren() {
return selectedChildren;
}
public void setSelectedChildren(List<Child> selectedChildren) {
this.selectedChildren = selectedChildren;
}
public Parent getSelectedParent() {
return selectedParent;
}
public void setSelectedParent(Parent selectedParent) {
this.selectedParent = selectedParent;
}
}
XHTML:
<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:f="http://java.sun.com/jsf/core"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:p="http://primefaces.org/ui">
<h:head></h:head>
<h:body>
<h:form id="selectOne">
<p:messages autoUpdate="true" />
<h:outputLabel for="parents" value="Parents:" />
<p:selectOneMenu converter="#{parentConverter}" id="parents" value="#{backingBean.selectedParent}">
<p:ajax update="children" listener="#{backingBean.parentChanged}" />
<f:selectItem noSelectionOption="true" value="#{null}" itemLabel="None" />
<f:selectItems value="#{backingBean.parents}" var="p" itemLabel="#{p.name}" itemValue="#{p}" />
</p:selectOneMenu>
<h:outputLabel for="children" value="Children:" />
<p:selectCheckboxMenu converter="#{childConverter}" id="children"
value="#{backingBean.selectedChildren}"
label="Children" filter="true" filterMatchMode="startsWith">
<p:ajax update="display" listener="#{backingBean.selectedSonChanged}" />
<f:selectItems value="#{backingBean.children}" var="c" itemLabel="#{c.name}" itemValue="#{c}" />
</p:selectCheckboxMenu>
<p:outputPanel id="display">
<p:dataList value="#{backingBean.selectedChildren}" var="sn" emptyMessage="No children selected">
#{sn.name}
</p:dataList>
</p:outputPanel>
<p:commandButton value="Submit" update="display, selectOne" />
</h:form>
</h:body>
</html>
The complete project is here: https://github.com/cenobyte321/jsfsamples/tree/master/selectcheckboxmenu
You can find a video of the interaction mentioned previously here:
https://github.com/cenobyte321/jsfsamples/blob/master/selectcheckboxmenu/example1.mp4?raw=true
As you can see when choosing another "Parent" and then selecting their children the previous children list gets substituted. How can I properly modify this behavior so the previously selected elements get persisted and shown as checked in the selectCheckboxMenu?
EDIT 2:
One solution I found was introducing another variable which will hold the global values and will be modified in the listener method "selectedSonChanged". Here's the relevant code:
import javax.annotation.PostConstruct;
import javax.faces.bean.ManagedBean;
import javax.faces.bean.ViewScoped;
import javax.inject.Inject;
import java.util.ArrayList;
import java.util.List;
import java.util.stream.Collectors;
#ManagedBean
#ViewScoped
public class BackingBean {
private List<Parent> parents = new ArrayList<>();
private List<Child> children = new ArrayList<>();
private List<Child> selectedChildren = new ArrayList<>();
private List<Child> globalSelectedChildren = new ArrayList<>();
private Parent selectedParent = new Parent();
#Inject
FamilyService service;
#PostConstruct
public void init(){
parents = service.findParents();
}
public void parentChanged(){
children = new ArrayList<>();
if(getSelectedParent() == null){
return;
}
children = service.findChildrenByParent(getSelectedParent());
selectedChildren = globalSelectedChildren.stream().filter(c -> c.getParent().equals(selectedParent)).collect(Collectors.toList());
System.out.println(selectedChildren.size());
}
public void selectedSonChanged(){
System.out.println(selectedChildren.size());
globalSelectedChildren = globalSelectedChildren.stream().filter(c -> !c.getParent().equals(selectedParent)).collect(Collectors.toList());
globalSelectedChildren.addAll(selectedChildren);
}
public List<Parent> getParents() {
return parents;
}
public void setParents(List<Parent> parents) {
this.parents = parents;
}
public List<Child> getChildren() {
return children;
}
public void setChildren(List<Child> children) {
this.children = children;
}
public List<Child> getSelectedChildren() {
return selectedChildren;
}
public void setSelectedChildren(List<Child> selectedChildren) {
this.selectedChildren = selectedChildren;
}
public Parent getSelectedParent() {
return selectedParent;
}
public void setSelectedParent(Parent selectedParent) {
this.selectedParent = selectedParent;
}
public List<Child> getGlobalSelectedChildren() {
return globalSelectedChildren;
}
public void setGlobalSelectedChildren(List<Child> globalSelectedChildren) {
this.globalSelectedChildren = globalSelectedChildren;
}
}
XHTML:
<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:f="http://java.sun.com/jsf/core"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:p="http://primefaces.org/ui">
<h:head></h:head>
<h:body>
<h:form id="selectOne">
<p:messages autoUpdate="true" />
<h:outputLabel for="parents" value="Parents:" />
<p:selectOneMenu converter="#{parentConverter}" id="parents" value="#{backingBean.selectedParent}">
<p:ajax update="children" listener="#{backingBean.parentChanged}" />
<f:selectItem noSelectionOption="true" value="#{null}" itemLabel="None" />
<f:selectItems value="#{backingBean.parents}" var="p" itemLabel="#{p.name}" itemValue="#{p}" />
</p:selectOneMenu>
<h:outputLabel for="children" value="Children:" />
<p:selectCheckboxMenu converter="#{childConverter}" id="children"
value="#{backingBean.selectedChildren}"
label="Children" filter="true" filterMatchMode="startsWith">
<p:ajax update="display" listener="#{backingBean.selectedSonChanged}" />
<f:selectItems value="#{backingBean.children}" var="c" itemLabel="#{c.name}" itemValue="#{c}" />
</p:selectCheckboxMenu>
<p:outputPanel id="display">
<p:dataList value="#{backingBean.globalSelectedChildren}" var="sn" emptyMessage="No children selected">
#{sn.name}
</p:dataList>
</p:outputPanel>
<p:commandButton value="Submit" update="display, selectOne" />
</h:form>
</h:body>
</html>
Here's the branch with this solution: https://github.com/cenobyte321/jsfsamples/tree/solution-1/selectcheckboxmenu
Hi trying to call the method on button click, but it doesnt work i also tried onclick instead action it also doesnt work. i couldnt understand where is the mistake please help me
here is my managed bean
package com.primefaces.managedbean;
import java.io.Serializable;
import java.util.ArrayList;
import java.util.List;
import javax.annotation.PostConstruct;
import javax.faces.bean.ManagedBean;
import javax.faces.bean.ManagedProperty;
import javax.faces.bean.ViewScoped;
import com.primefaces.domain.KenLocation;
import com.primefaces.service.ILocationService;
#ManagedBean(name = "locationbean")
#ViewScoped
public class LocationBean implements Serializable {
/**
*
*/
private static final long serialVersionUID = 1101264226039168006L;
/**
*
*/
#ManagedProperty(value = "#{LocationService}")
private ILocationService locationService;
private List<KenLocation> locationList = new ArrayList<KenLocation>();
KenLocation kenLocation;
private String locationName;
private String address1;
private String address2;
private String city;
private String pincode;
private String state;
private String contactNo;
private String organisationName;
#PostConstruct
private void init() {
locationList = locationService.onLoad();
}
public void addnewlocation() {
System.out.println("I am inside newlocation");
kenLocation = new KenLocation();
kenLocation.setLocationName(locationName);
kenLocation.setAddress1(address1);
kenLocation.setAddress2(address2);
kenLocation.setCity(city);
kenLocation.setPincode(Integer.parseInt(pincode));
kenLocation.setPhone(contactNo);
System.out.println(kenLocation);
}
public String getLocationName() {
return locationName;
}
public void setLocationName(String locationName) {
this.locationName = locationName;
}
public String getAddress1() {
return address1;
}
public void setAddress1(String address1) {
this.address1 = address1;
}
public String getAddress2() {
return address2;
}
public void setAddress2(String address2) {
this.address2 = address2;
}
public String getCity() {
return city;
}
public void setCity(String city) {
this.city = city;
}
public String getPincode() {
return pincode;
}
public void setPincode(String pincode) {
this.pincode = pincode;
}
public String getState() {
return state;
}
public void setState(String state) {
this.state = state;
}
public String getContactNo() {
return contactNo;
}
public void setContactNo(String contactNo) {
this.contactNo = contactNo;
}
public String getOrganisationName() {
return organisationName;
}
public void setOrganisationName(String organisationName) {
this.organisationName = organisationName;
}
public ILocationService getLocationService() {
return locationService;
}
public void setLocationService(ILocationService locationservice) {
this.locationService = locationservice;
}
public List<KenLocation> getLocationList() {
return locationList;
}
public void setLocationList(List<KenLocation> a_locationList) {
locationList = a_locationList;
}
}
and JSF
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<ui:composition xmlns="http://www.w3.org/1999/xhtml"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:f="http://java.sun.com/jsf/core"
xmlns:p="http://primefaces.org/ui"
xmlns:ui="http://java.sun.com/jsf/facelets">
<h5>Product List {9 Products can be added per mail}</h5>
<p:separator></p:separator>
<p:growl id="growlLocationtable"></p:growl>
<p:commandButton id="new_location" title="CreateLocation" type="button"
icon="ui-icon-document" onclick="PF('dlg1').show()" />
<p:commandButton id="edit_location" title="EditLocation"
icon=" ui-icon-pencil" />
<p:commandButton id="delete_location" title="DeleteLocation"
icon="ui-icon-trash" />
<h:form id="Locationdataform">
<h:panelGrid columns="2" id="Locationdatatablepanel" resizable="false"
size="600">
<p:dataTable id="Locationdatatable" var="odt"
value="#{locationbean.locationList}">
<p:column headerText="Location Name">
<h:outputText value="#{odt.locationName}" />
</p:column>
<p:column headerText="Address Line1">
<h:outputText value="#{odt.address1}" />
</p:column>
<p:column headerText="Address Line2">
<h:outputText value="#{odt.address2}" />
</p:column>
<p:column headerText="City">
<h:outputText value="#{odt.city}" />
</p:column>
<p:column headerText="Pincode">
<h:outputText value="#{odt.pincode}" />
</p:column>
<p:column headerText="State">
<h:outputText value="#{odt.state}" />
</p:column>
<p:column headerText="Contact No">
<h:outputText value="#{odt.phone}" />
</p:column>
<p:column headerText="Organisation Name">
<h:outputText value="#{odt.ken_Org_ID.name}" />
</p:column>
</p:dataTable>
</h:panelGrid>
</h:form>
<!-- dialog -->
<p:dialog header="Add Location" widgetVar="dlg1" minHeight="40"
modal="true">
<h:form id="addLocationForm">
<h:panelGrid columns="2" id="grid">
<h:outputLabel value="Location Name"></h:outputLabel>
<p:inputText id="txt_Name" value="#{locationbean.locationName}" />
<h:outputLabel value="Address1"></h:outputLabel>
<p:inputText id="txt_address1" value="#{locationbean.address1}" />
<h:outputLabel value="Address2"></h:outputLabel>
<p:inputText id="txt_address2" value="#{locationbean.address2}" />
<h:outputLabel value="City"></h:outputLabel>
<p:inputText id="txt_city" value="#{locationbean.city}" />
<h:outputLabel value="Pincode"></h:outputLabel>
<p:inputText id="txt_pincode" value="#{locationbean.pincode}" />
<h:outputLabel value="State"></h:outputLabel>
<p:inputText id="txt_state" value="#{locationbean.state}" />
<h:outputLabel value="Contactno"></h:outputLabel>
<p:inputText id="txt_contactno" value="#{locationbean.contactNo}" />
<h:outputLabel value="Organistaion name"></h:outputLabel>
<p:inputText id="txt_orgname"
value="#{locationbean.organisationName}" />
<p:commandButton id="addlocatin_btn" value="Save"
action="#{locationbean.addnewlocation}" type="submit" />
</h:panelGrid>
</h:form>
</p:dialog>
I would like to limit the number of rows a user can select to 4 and require a minimum of 1 one to be selected. Can this be done with a Primefaces DataTable?
This can easily be done using Primefaces Datatable. I've done an example for you below
XHTML Code:
<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:f="http://java.sun.com/jsf/core"
xmlns:p="http://primefaces.org/ui">
<h:head>
<title>Test</title>
</h:head>
<h:body>
<h:form id="form">
<p:dataTable value="#{tBean.availablePersonList}" var="person" id="table"
selection="#{tBean.selectedPersonList}" selectionMode="multi"
rowKey="#{person.name}">
<p:ajax event="rowSelect" listener="#{tBean.rowSelect}" update=":form:table"/>
<p:column headerText="Name">
#{person.name}
</p:column>
<p:column headerText="Address">
#{person.address}
</p:column>
</p:dataTable>
<p:commandButton value="Submit" actionListener="#{tBean.submit}"></p:commandButton>
</h:form>
</h:body>
</html>
Person Class
public class Person {
private String name;
private String address;
public Person(String name, String address) {
super();
this.name = name;
this.address = address;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getAddress() {
return address;
}
public void setAddress(String address) {
this.address = address;
}
}
ManagedBean Code:
import java.io.Serializable;
import java.util.ArrayList;
import java.util.List;
import javax.faces.application.FacesMessage;
import javax.faces.bean.ManagedBean;
import javax.faces.bean.ViewScoped;
import javax.faces.event.ActionEvent;
import org.primefaces.context.RequestContext;
import org.primefaces.event.SelectEvent;
#ManagedBean(name = "tBean")
#ViewScoped
public class TestBean implements Serializable {
private List<Person> availablePersonList;
private List<Person> selectedPersonList;
public TestBean() {
availablePersonList = new ArrayList<Person>();
availablePersonList.add(new Person("John", "London"));
availablePersonList.add(new Person("Pat", "London"));
availablePersonList.add(new Person("Meerkut", "Houston"));
availablePersonList.add(new Person("Ali", "London"));
availablePersonList.add(new Person("Parker", "Edinburgh"));
availablePersonList.add(new Person("Laurent", "Paris"));
}
public void submit(ActionEvent e) {
if (selectedPersonList.size() < 1) {
RequestContext.getCurrentInstance().showMessageInDialog(new FacesMessage("Select at least one item"));
return;
}
}
public void rowSelect(SelectEvent event) {
System.out.println(selectedPersonList.size());
if (selectedPersonList.size() > 3) {
selectedPersonList.remove(event.getObject());
RequestContext.getCurrentInstance().showMessageInDialog(new FacesMessage("You cannot selected more than 3"));
return;
}
}
public List<Person> getAvailablePersonList() {
return availablePersonList;
}
public void setAvailablePersonList(List<Person> availablePersonList) {
this.availablePersonList = availablePersonList;
}
public List<Person> getSelectedPersonList() {
return selectedPersonList;
}
public void setSelectedPersonList(List<Person> selectedPersonList) {
this.selectedPersonList = selectedPersonList;
}
}
Outcome:
in this example, we iterate all checkboxes and add a click event listener to each one. if checkbox is clicked then we check selected row count.
<h:form id="form">
<p:dataTable var="car" value="#{listBean.cars}"
selection="#{listBean.selectedCars}"
rowKey="#{car.id}"
paginator="true" rows="10"
widgetVar="myDataTable">
<p:column selectionMode="multiple" style="width:2%;text-align:center"/>
<p:column headerText="Id">
<h:outputText value="#{car.id}"/>
</p:column>
<p:column headerText="Year">
<h:outputText value="#{car.year}"/>
</p:column>
<p:column headerText="Manufacturer">
<h:outputText value="#{car.manufacturer}"/>
</p:column>
<p:column headerText="Model">
<h:outputText value="#{car.model}"/>
</p:column>
<p:column headerText="Color">
<h:outputText value="#{car.color}"/>
</p:column>
</p:dataTable>
<script type="text/javascript">
var MAX_ROW_SELECTION_COUNT = 4;
$(function () {
if (myDataTable.isSelectionEnabled()) {
var dataTableId = myDataTable.jqId;
// hide check all button
$(dataTableId + ' thead:first > tr > th.ui-selection-column .ui-chkbox-all').hide();
var checkboxes = $(dataTableId + ' tbody.ui-datatable-data:first > tr > td.ui-selection-column .ui-chkbox-box');
checkboxes.each(function (index, element) {
var chckbx = $(element);
console.log(chckbx);
chckbx.on("click", function (e) {
var disabled = chckbx.hasClass('ui-state-disabled'),
checked = chckbx.hasClass('ui-state-active');
if (!(checked || disabled)) {
if (myDataTable.getSelectedRowsCount() >= MAX_ROW_SELECTION_COUNT) {
alert('You cannot select more than ' + MAX_ROW_SELECTION_COUNT +' rows.');
return false;
}
}
});
});
}
});
</script>
</h:form>
I have a problem that i can't solve. I have my xhtml page:
The problem is that i have a form where i insert the name and select the location of a travel. It renders an external panel "Volo" where the selectionMenu is updated with some values got from DB based on location selected. Next i want to get a value from Volo selection and update the another panel with ID="HE"(is the one called HotelEsc).
I'm in trouble with the selectionMenu in "Volo" because i can't get the value into it. Always gives an NullPointException error. Probably the problem is that i'm trying to understand how Update and render work and i am mistaking something about these operations. Hope on your help thank you.
Code of xhtml:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:f="http://java.sun.com/jsf/core"
xmlns:ui="http://java.sun.com/jsf/facelets"
xmlns:p="http://primefaces.org/ui">
<h:head>
<title>Add a Default Package</title>
</h:head>
<h:body>
<h:form id="form">
<p:panel header="DefaultPackage Form">
<h:panelGrid columns="3" id="regGrid">
<h:outputLabel for="Name">Name:</h:outputLabel>
<p:inputText id="Name"
value="#{addDefaultPackageBean.defpackDTO.name}" />
<p:message for="Name" />
<h:outputLabel for="location">Locations Available:</h:outputLabel>
<h:selectOneMenu for="location"
value="#{addDefaultPackageBean.defpackDTO.location}">
<f:ajax listener="#{addDefaultPackageBean.Search()}" render="Volo" />
<f:selectItems id="location"
value="#{addDefaultPackageBean.availableLocations}" />
</h:selectOneMenu>
</h:panelGrid>
</p:panel>
<p:panel header="Voli Disponibili per la location selezionata"
id="Volo">
<h:outputLabel for="Fly">Volo:</h:outputLabel>
<h:selectOneMenu for="Fly" value="#{addDefaultPackageBean.fly}">
<f:selectItems id="Fly" value="#{addDefaultPackageBean.elelisfly}"
var="ElementDTO" itemValue="#{ElementDTO.name}"
itemLabel="#{ElementDTO.name}" />
</h:selectOneMenu>
<p:commandButton action="#{addDefaultPackageBean.sel()}" value="HE" render=":form,:form:regularGrid,:form:Volo" update=":form:Volo" process="form:regGrid,#this"></p:commandButton>
</p:panel>
<p:panel header="HotelEsc" id="HotelEscursioni">
<h:panelGrid columns="3" id="regularGrid">
<h:outputLabel for="Hotel">Hotel:</h:outputLabel>
<h:selectOneMenu for="Hotel" value="#{addDefaultPackageBean.hotel}">
<f:selectItems id="Hotel"
value="#{addDefaultPackageBean.elelishotel}" var="ElementDTO"
itemValue="#{ElementDTO.name}" itemLabel="#{ElementDTO.name}" />
</h:selectOneMenu>
<p:message for="Hotel" />
<h:outputLabel for="Escursion">Escursioni:</h:outputLabel>
<f:facet name="header">Clicca su view per vedere i dettagli</f:facet>
<p:dataTable id="Escursion" var="esc"
value="#{addDefaultPackageBean.elelisescursion}"
rowKey="#{esc.name}"
selection="#{addDefaultPackageBean.selectedEscursions}"
selectionMode="multiple">
<p:column headerText="Nome"> #{esc.name} </p:column>
<p:column headerText="Costo"> #{esc.cost} </p:column>
<p:column headerText="Data Iniziale"> #{esc.startingDate} </p:column>
<p:column headerText="Data Fine"> #{esc.endingDate} </p:column>
<f:facet name="footer">
</f:facet>
</p:dataTable>
</h:panelGrid>
</p:panel>
</h:form>
</h:body>
</html>
Code of related bean:
package beans;
import java.awt.Event;
import java.io.Serializable;
import java.util.ArrayList;
import javax.annotation.PostConstruct;
import javax.ejb.EJB;
import javax.enterprise.context.SessionScoped;
import javax.faces.bean.ManagedBean;
import javax.faces.bean.RequestScoped;
import javax.faces.view.ViewScoped;
import elementManagement.ElementMgr;
import elementManagementDTO.ElementDTO;
import DefaultPackageManagement.DefaultPackageMgr;
import DefaultPackageManagementDTO.DefaultPackageDTO;
#ManagedBean(name="addDefaultPackageBean") //come viene richiamato
#ViewScoped
public class AddDefaultPackageBean{
/**
*
*/
#EJB
private DefaultPackageMgr defpackMgr;
private DefaultPackageDTO defpackDTO;
private ArrayList<ElementDTO> elelisfly;
private ArrayList<ElementDTO> elelishotel;
private ArrayList<ElementDTO> elelisescursion;
private ArrayList<ElementDTO> elelis;
private ElementDTO[] selectedEscursions;
private String fly;
private String hotel;
private boolean flag=true;
private boolean flagdopo=true;
private ArrayList<String> availableLocations;
private ElementDTO flyElem;
#EJB
private ElementMgr elemMgr;
public ElementDTO[] getSelectedEscursions() {
return selectedEscursions;
}
public void setSelectedEscursions(ElementDTO[] selectedEscursions) {
this.selectedEscursions = selectedEscursions;
}
public AddDefaultPackageBean() {
defpackDTO = new DefaultPackageDTO();
}
#PostConstruct
public void init()
{
this.elelisfly=new ArrayList<ElementDTO>();
this.elelishotel=new ArrayList<ElementDTO>();
this.elelisescursion=new ArrayList<ElementDTO>();
this.setElelis(elemMgr.getAllElements());
this.availableLocations=new ArrayList<String>();
this.flyElem=new ElementDTO();
for(ElementDTO e:elelis)
{
if (this.availableLocations.contains(e.getLocation())==false)
{
this.availableLocations.add(e.getLocation());
}
}
}
public String add() {
this.AssignElemFlyFromSelection();
this.AssignElemHotelFromSelection();
this.AssignElemEscursionFromSelection();
defpackMgr.save(defpackDTO);
return "/employee/index?faces-redirect=true";
}
public void sel()
{
System.out.print("ehila" );
this.setElelis(this.elemMgr.getAllElementsByLocation(this.defpackDTO.getLocation()));
for(ElementDTO e:elelis)
{
System.out.print("elemento della location Haiti "+e.getName());
}
this.AssignElemFlyFromSelection();
System.out.print(this.fly+"Il volo selezionato per la location รจ "+this.getFlyElem().getName() );
this.elelisescursion.clear();
this.elelishotel.clear();
for(ElementDTO e:elelis)
{
if(e.getType().equals("Hotel"))
{
System.out.print("ho un hotel tra gli elementi "+e.getName() );
if(e.getStartingDate().after(this.flyElem.getStartingDate())&&((e.getEndingDate().before(this.flyElem.getEndingDate()))))
{
System.out.print("ho un hotel tra gli elementi con le date giuste"+e.getName());
this.getElelishotel().add(e);
}
}
else
{
if(e.getType().equals("Escursion"))
{
if(e.getStartingDate().after(this.flyElem.getStartingDate())&&(e.getEndingDate().before(this.flyElem.getEndingDate())))
{
this.getElelishotel().add(e);
}
}
}
}
this.setFlag(true);
this.setFlagdopo(true);
}
public DefaultPackageDTO getDefpackDTO() {
return defpackDTO;
}
public void setDefpackDTO(DefaultPackageDTO defpackDTO) {
this.defpackDTO = defpackDTO;
}
public ArrayList<ElementDTO> getElelisfly() {
return elelisfly;
}
public void setElelisfly(ArrayList<ElementDTO> elelisfly) {
this.elelisfly = elelisfly;
}
public ArrayList<ElementDTO> getElelishotel() {
return elelishotel;
}
public void setElelishotel(ArrayList<ElementDTO> elelishotel) {
this.elelishotel = elelishotel;
}
public ArrayList<ElementDTO> getElelisescursion() {
return elelisescursion;
}
public void setElelisescursion(ArrayList<ElementDTO> elelisescursion) {
this.elelisescursion = elelisescursion;
}
public String getFly() {
return fly;
}
public void setFly(String fly) {
this.fly = fly;
}
public String getHotel() {
return hotel;
}
public void setHotel(String hotel) {
this.hotel = hotel;
}
private void AssignElemFlyFromSelection()
{
for (ElementDTO elem:this.elelisfly)
{
if(elem.getName().equals(this.fly))
{
this.flyElem=elem;
}
}
}
private void AssignElemHotelFromSelection()
{
for (ElementDTO elem:this.elelishotel)
{
if(elem.getName().equals(this.hotel))
{
this.defpackDTO.getElem().add(elem);
}
}
}
private void AssignElemEscursionFromSelection()
{
for(int i=0;i<selectedEscursions.length;i++)
{
this.defpackDTO.getElem().add(selectedEscursions[i]);
}
}
public void Search(){
String s=defpackDTO.getLocation();
System.out.print("luogo scelto "+s);
this.setElelis(this.elemMgr.getAllElementsByLocation(s));
for(ElementDTO e:elelis)
{
System.out.print("aggiungo volo "+e.getName());
if(e.getType().equals("Flight"))
{
this.getElelisfly().add(e);
System.out.print("aggiungo volo "+e.getName());
}
}
this.setFlag(true);
}
public ArrayList<ElementDTO> getElelis() {
return elelis;
}
public void setElelis(ArrayList<ElementDTO> elelis) {
this.elelis = elelis;
}
public ArrayList<String> getAvailableLocations() {
return availableLocations;
}
public void setAvailableLocations(ArrayList<String> availableLocations) {
this.availableLocations = availableLocations;
}
public Boolean getFlag() {
return flag;
}
public void setFlag(Boolean flag) {
this.flag = flag;
}
public boolean isFlagdopo() {
return flagdopo;
}
public void setFlagdopo(boolean flagdopo) {
this.flagdopo = flagdopo;
}
public ElementDTO getFlyElem() {
return flyElem;
}
public void setFlyElem(ElementDTO flyElem) {
this.flyElem = flyElem;
}
}
You are somehow misunderstood the use of some attributes.
I'll post my notes on your code.
The p:commandButton inside Volo section is confusing
it doesn't have a render attribute, it's the update instead, you should remove render.
The update you have is updating the current section Volo is that what you need ?
it's processing only the first section which is regGrid, which means that the values inside Volo section won't be updated to the model inside the managedBean (causing the NullPointer), is that what you want ? don't think so.
Your "HE" button should be link this (If I understood what you want correctly)
<p:commandButton action="#{addDefaultPackageBean.sel()}"
value="HE"
update="HotelEscursioni" process="#parent">
</p:commandButton>
Hope this Helps...
After lots of attempts, i understood how render/update works. I hope the solution with the xhtml here down helps other people with the same problem:
The updates have to be done on the components that you want to refresh(for example in my situation the targets of the updates given from chosen values in selections); process has to be used to specificate which components are used to implement the action.
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:f="http://java.sun.com/jsf/core"
xmlns:ui="http://java.sun.com/jsf/facelets"
xmlns:p="http://primefaces.org/ui">
<h:head>
<title>Add a Default Package</title>
</h:head>
<h:body>
<h:form id="form">
<p:outputLabel for="Name">Name:</p:outputLabel>
<p:inputText id="Name"
value="#{addDefaultPackageBean.defpackDTO.name}" />
<p:message for="Name" />
<p:outputLabel for="Location">Locations Available:</p:outputLabel>
<p:selectOneMenu id="Location"
value="#{addDefaultPackageBean.defpackDTO.location}">
<f:selectItems
value="#{addDefaultPackageBean.availableLocations}" />
</p:selectOneMenu>
<p:commandButton action="#{addDefaultPackageBean.Search()}" value="Ciao" render=":form:Volo" update=":form:Volo :form"></p:commandButton>
<p:panel header="Voli Disponibili per la location selezionata"
id="Volo" rendered="#{addDefaultPackageBean.flag}">
<h:panelGrid columns="3" id="voloGrid">
<p:outputLabel for="Volare">Volo:</p:outputLabel>
<p:selectOneMenu for="Volare" value="#{addDefaultPackageBean.fly}">
<f:selectItems id="Volare" value="#{addDefaultPackageBean.elelisfly}"
var="Ciao" itemValue="#{Ciao.name}"
itemLabel="#{Ciao.name}" />
</p:selectOneMenu>
<p:commandButton actionListener="#{addDefaultPackageBean.sel()}" value="hesef" update=":form:voloGrid :form:HotelEscursioni" process=":form:Location,:form:voloGrid,#this"/>
</h:panelGrid>
</p:panel>
<p:panel header="HotelEscurs" id="HotelEscursioni" rendered="#{addDefaultPackageBean.flagdopo}">
<p:outputLabel for="Hotel">Hotel:</p:outputLabel>
<p:selectOneMenu for="Hotel" value="#{addDefaultPackageBean.hotel}">
<f:selectItems id="Hotel"
value="#{addDefaultPackageBean.elelishotel}" var="ElementDTO"
itemValue="#{ElementDTO.name}" itemLabel="#{ElementDTO.name}" />
</p:selectOneMenu>
<p:message for="Hotel" />
<p:dataTable id="Escursion" var="esc"
value="#{addDefaultPackageBean.elelisescursion}"
rowKey="#{esc.name}"
selection="#{addDefaultPackageBean.selectedEscursions}"
selectionMode="multiple">
<p:column headerText="Nome"> #{esc.name} </p:column>
<p:column headerText="Costo"> #{esc.cost} </p:column>
<p:column headerText="Data Iniziale"> #{esc.startingDate} </p:column>
<p:column headerText="Data Fine"> #{esc.endingDate} </p:column>
</p:dataTable>
</p:panel>
</h:form>
</h:body>
</html>
I have the following files in my application but I can't get the values from the selectOneMenu on file elementoUpdateDialog.xhtml to update the dataTable on gerirElementos.xhtml and sql table.
Where is my error?
elementoUpdateDialog.xhtml
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:ui="http://java.sun.com/jsf/facelets"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:f="http://java.sun.com/jsf/core"
xmlns:p="http://primefaces.org/ui">
<h:body>
<p:dialog widgetVar="elementoUpdateDialogWidget"
id="elementoUpdateDialogId" height="300" width="500" modal="true"
closable="true" draggable="false" resizable="false">
<h:form id="elementoUpdateDialogForm" prependId="false">
<h:panelGrid columns="2">
<h:outputText value="elementoID" />
<h:inputText value="#{elementoMB.elemento.elementoId}"
required="true" label="elementoID" />
<h:outputText value="Posto" />
<h:outputText value="#{elementoMB.elemento.posto.postoId}" />
<h:selectOneMenu value="#{postoMB.posto.postoId}">
<f:selectItems value="#{postoMB.allPostos}" var ="posto"
itemLabel="#{postoMB.posto.posto}" itemValue="# {elementoMB.elemento.posto.postoId}"/>
</h:selectOneMenu>
<br />
<h:outputText value="Classe" />
<h:outputText value="#{elementoMB.elemento.classe.classeId}" />
<h:selectOneMenu value="# {elementoMB.elemento.classe.classeId}">
<f:selectItems value="#{classeMB.allClasses}"/>
<f:selectItem itemValue="# {elementoMB.elemento.classe.classeId}" itemLabel="#{elementoMB.elemento.classe.classeId}"/>
</h:selectOneMenu>
<br/>
<h:outputText value="Nome" />
<h:inputText value="#{elementoMB.elemento.nome}" required="true"
label="Nome" />
<h:outputText value="NII" />
<h:inputText value="#{elementoMB.elemento.NII}" required="true"
label="NII" />
<p:commandButton value="Gravar" icon="ui-icon-plus"
action="#{elementoMB.updateElemento()}"
update=":messageGrowl :elementosForm:elementosTable"
oncomplete="closeDialogIfSucess(xhr, status, args, elementoUpdateDialogWidget, 'elementoUpdateDialogId')" />
<p:commandButton value="Cancelar" icon="ui-icon-cancel"
actionListener="#{elementoMB.resetElemento()}"
onclick="elementoUpdateDialogWidget.hide();" type="button" />
</h:panelGrid>
</h:form>
</p:dialog>
</h:body>
</html>
gerirElementos.xhtml
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:ui="http://java.sun.com/jsf/facelets"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:f="http://java.sun.com/jsf/core"
xmlns:p="http://primefaces.org/ui">
<h:head>
</h:head>
<h:body>
<ui:composition template="/pages/protected/templates/master.xhtml">
<ui:define name="divMain">
<p:menubar>
<p:submenu label="Elementos" icon="ui-icon-contact">
<p:menuitem value="Listar"
url="/pages/protected/defaultUser/gerirElementos.xhtml" />
</p:submenu>
<p:submenu label="Classes" icon="ui-icon-contact">
<p:menuitem value="Listar"
url="/pages/protected/admin/gerirClasses.xhtml" />
</p:submenu>
<p:submenu label="Postos" icon="ui-icon-contact">
<p:menuitem value="Listar"
url="/pages/protected/admin/gerirPostos.xhtml" />
</p:submenu>
<p:submenu label="RegistoSarPerm" icon="ui-icon-contact">
<p:menuitem value="Listar"
url="/pages/protected/defaultUser/gerirRegistoSarPerm.xhtml" />
</p:submenu>
</p:menubar>
<h:form id="elementosForm">
<p:dataTable id="elementosTable" var="elemento"
value="#{elementoMB.allElementos}" paginator="true" rows="10"
selepaginatorTemplate="{CurrentPageReport} {FirstPageLink} {PreviousPageLink} {PageLinks} {NextPageLink} {LastPageLink} {RowsPerPageDropdown}"
rowsPerPageTemplate="1,5,10">
<f:facet name="header">
Lista de Elementos
</f:facet>
<p:column headerText="NII" sortBy="nii" id="nii">
#{elemento.NII}
</p:column>
<p:column headerText="Posto" sortBy="posto" id="posto">
#{elemento.posto.posto}
</p:column>
<p:column headerText="Classe" sortBy="classe" id="classe">
#{elemento.classe.classe}
</p:column>
<p:column headerText="Nome" sortBy="nome" id="nome">
#{elemento.nome}
</p:column>
<p:column>
<p:spacer width="10px" />
<p:commandButton value="Editar" icon="ui-icon-pencil"
update=":elementoUpdateDialogForm"
onclick="elementoUpdateDialogWidget.show();">
<f:setPropertyActionListener target="#{elementoMB.elemento}"
value="#{elemento}" />
</p:commandButton>
<p:spacer width="10px" />
<p:commandButton value="Eliminar" icon="ui-icon-trash"
update=":elementoDeleteDialogForm"
onclick="elementoDeleteDialogWidget.show();">
<f:setPropertyActionListener target="#{elementoMB.elemento}"
value="#{elemento}" />
</p:commandButton>
<p:spacer width="10px" />
</p:column>
</p:dataTable>
<p:commandButton value="Novo Elemento" icon="ui-icon-plus"
actionListener="#{elementoMB.resetElemento()}"
onclick="elementoCreateDialogWidget.show();" />
</h:form>
<ui:include
src="/pages/protected/defaultUser/dialogs/elementoCreateDialog.xhtml" />
<ui:include
src="/pages/protected/defaultUser/dialogs/elementoUpdateDialog.xhtml" />
<ui:include
src="/pages/protected/defaultUser/dialogs/elementoDeleteDialog.xhtml" />
</ui:define>
</ui:composition>
</h:body>
</html>
Elemento.java
package com.model;
import java.io.Serializable;
import java.util.List;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.ManyToMany;
import javax.persistence.ManyToOne;
import javax.persistence.NamedQuery;
import javax.persistence.OneToMany;
import javax.persistence.OneToOne;
import javax.persistence.Table;
#Entity
#Table(name="Elemento")
public class Elemento implements Serializable {
private static final long serialVersionUID = 1L;
#Id
#GeneratedValue(strategy = GenerationType.AUTO)
#Column(name="elementoId")
private int elementoId;
#ManyToOne
#JoinColumn(name = "classeId")
private Classe classe;
#ManyToOne
#JoinColumn(name="postoID")
private Posto posto;
#Column(name="NII")
private String NII;
#Column(name="nome")
private String nome;
public Elemento(){
}
public Elemento(String NII, String nome){
this.NII = NII;
this.nome = nome;
}
//Getters and Setters
public int getElementoId() {
return elementoId;
}
public void setElementoId(int elementoId) {
this.elementoId = elementoId;
}
public String getNII() {
return NII;
}
public void setNII(String nII) {
NII = nII;
}
public String getNome() {
return nome;
}
public void setNome(String nome) {
this.nome = nome;
}
public Classe getClasse() {
return classe;
}
public void setClasse(Classe classe) {
this.classe = classe;
}
public Posto getPosto() {
return posto;
}
public void setPosto(Posto posto) {
this.posto = posto;
}
#Override
public int hashCode() {
return elementoId;
}
#Override
public boolean equals(Object obj) {
if (obj instanceof Elemento) {
Elemento elemento = (Elemento) obj;
return elemento.getElementoId() == elementoId;
}
return false;
}
}
ElementoMB.java
package com.mb;
import java.io.Serializable;
import java.util.List;
import javax.faces.bean.ManagedBean;
import javax.faces.bean.ViewScoped;
import com.facade.ElementoFacade;
import com.model.Classe;
import com.model.Elemento;
import com.model.Posto;
#ViewScoped
#ManagedBean
public class ElementoMB extends AbstractMB implements Serializable {
private static final long serialVersionUID = 1L;
private Posto posto;
private Classe classe;
private Elemento elemento;
private List<Elemento> elementos;
private ElementoFacade elementoFacade;
public void createElemento() {
try {
getElementoFacade().createElemento(elemento);;
closeDialog();
displayInfoMessageToUser("Created With Sucess");
loadElementos();
resetElemento();
} catch (Exception e) {
keepDialogOpen();
displayErrorMessageToUser("Ops, we could not create. Try again later");
e.printStackTrace();
}
}
public void updateElemento() {
try {
getElementoFacade().updateElemento(elemento);
closeDialog();
displayInfoMessageToUser("Updated With Sucess");
loadElementos();
resetElemento();
} catch (Exception e) {
keepDialogOpen();
displayErrorMessageToUser("Ops, we could not create. Try again later");
e.printStackTrace();
}
}
public void deleteElemento() {
try {
getElementoFacade().deleteElemento(elemento);
closeDialog();
displayInfoMessageToUser("Deleted With Sucess");
loadElementos();
resetElemento();
} catch (Exception e) {
keepDialogOpen();
displayErrorMessageToUser("Ops, we could not create. Try again later");
e.printStackTrace();
}
}
public List<Elemento> getAllElementos(){
if (elementos == null){
loadElementos();
}
return elementos;
}
public ElementoFacade getElementoFacade() {
if (elementoFacade == null) {
elementoFacade = new ElementoFacade();
}
return elementoFacade;
}
public Elemento getElemento() {
if (elemento == null) {
elemento = new Elemento();
}
return elemento;
}
public void setElemento(Elemento elemento) {
this.elemento = elemento;
}
private void loadElementos() {
elementos = getElementoFacade().listAll();
}
public void resetElemento() {
elemento = new Elemento();
}
public Posto getPosto() {
if (posto == null){
posto = new Posto();
}
return posto;
}
public void setPosto(Posto posto) {
this.posto = posto;
}
public Classe getClasse() {
if (classe == null) {
classe = new Classe();
}
return classe;
}
public void setClasse(Classe classe) {
this.classe = classe;
}
public void resetClasse() {
classe = new Classe();
}
}
ElementoFacade.java
package com.facade;
import java.io.Serializable;
import java.util.List;
import com.dao.ElementoDAO;
import com.model.Elemento;
public class ElementoFacade implements Serializable {
private static final long serialVersionUID = 1L;
private ElementoDAO elementoDAO = new ElementoDAO();
public void createElemento(Elemento elemento) {
elementoDAO.beginTransaction();
elementoDAO.save(elemento);
elementoDAO.commitAndCloseTransaction();
}
public void updateElemento(Elemento elemento) {
elementoDAO.beginTransaction();
Elemento persistedElemento = elementoDAO.find(elemento.getElementoId());
persistedElemento.setNome(elemento.getNome());
persistedElemento.setNII(elemento.getNII());
elementoDAO.commitAndCloseTransaction();
}
public void deleteElemento(Elemento elemento){
elementoDAO.beginTransaction();
Elemento persistedElementoWithIdOnly = elementoDAO.findReferenceOnly(elemento.getElementoId());
elementoDAO.delete(persistedElementoWithIdOnly);
elementoDAO.commitAndCloseTransaction();
}
public Elemento findElemento(int elementoId) {
elementoDAO.beginTransaction();
Elemento elemento = elementoDAO.find(elementoId);
elementoDAO.closeTransaction();
return elemento;
}
public List<Elemento> listAll() {
elementoDAO.beginTransaction();
List<Elemento> result = elementoDAO.findAll();
elementoDAO.closeTransaction();
return result;
}
}
Here,
<f:selectItems value="#{postoMB.allPostos}" var="posto"
itemLabel="#{postoMB.posto.posto}" itemValue="#{elementoMB.elemento.posto.postoId}"/>
Your itemLabel and itemValue attributes, representing the current option label and value, are wrong. They're for some unclear reason referencing a backing bean property instead of the currently iterated option object as definied in var="posto".
Fix it accordingly:
<f:selectItems value="#{postoMB.allPostos}" var="posto"
itemLabel="#{posto.postoId}" itemValue="#{posto}"/>
This should display the items correctly.
And here,
<h:selectOneMenu value="#{postoMB.posto.postoId}">
the selected item is wrong. This would only cause problems during submitting and during displaying a preselected item. You should refer the very same type as itemValue itself, not some ID (otherwise you're changing only the id of an entity instead of the entity itself, resulting in major potential trouble as those are references):
<h:selectOneMenu value="#{postoMB.posto}">
Supply if necessary a converter in case you don't have a #FacesConverter(forClass=Posto.class).
Apply the same lesson learnt on the other <h:selectOneMenu> you've there.
See also:
Our <h:selectOneMenu> wiki page
How to populate options of h:selectOneMenu from database?