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POJSF + Primefaces: Ajax CRUD-Actions in Master-Detail-View only work once per page-load
 

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    <p>I'm using Mojarra 2.0.3 on JBoss AS 6 with Primefaces 2.2.1 + Hibernate.</p> <p>I've got a master-detail-view with p:datatable and p:dialog for Person (prename, lastname).</p> <p>Code of Person.java:</p> <pre><code>@Entity public class Person implements Serializable { private static final long serialVersionUID = 279906432340876832L; @Id @GeneratedValue(strategy = javax.persistence.GenerationType.AUTO) private Long id; private String prename; private String lastname; // getter and setter... } </code></pre> <p>With a "create"-button a new instance can be created, with the "edit"-button, a selected item can be edited.</p> <p>Code of .xhtml:</p> <pre><code>&lt;h:form id="personForm"&gt; &lt;!-- 2 Buttons to open create/edit Dialog --&gt; &lt;p:panel id="tableButtons"&gt; &lt;p:commandButton value="create" action="#{personBean.showCreateView}" update="personForm:detailPanel" oncomplete="personDialog.show()" /&gt; &lt;p:commandButton value="edit" action="#{personBean.showEditView}" update="personForm:detailPanel" oncomplete="personDialog.show()" rendered="#{personBean.rowSelected}" /&gt; &lt;/p:panel&gt; &lt;!-- DataTable for list-View --&gt; &lt;p:dataTable var="item" styleClass="table" value="#{personBean.personList}" id="personTable" paginator="true" selectionMode="single" selection="#{personBean.selectedPerson}" rowSelectListener="#{personBean.select}" onRowSelectUpdate="personForm:tableButtons" rowUnselectListener="#{personBean.unselect}" onRowUnselectUpdate="personForm:tableButtons" rows="10"&gt; &lt;p:column sortBy="#{item.prename}"&gt; &lt;f:facet name="header"&gt; &lt;h:outputText value="prename" /&gt; &lt;/f:facet&gt; &lt;h:outputText value="#{item.prename}" /&gt; &lt;/p:column&gt; &lt;p:column sortBy="#{item.lastname}"&gt; &lt;f:facet name="header"&gt; &lt;h:outputText value="lastname" /&gt; &lt;/f:facet&gt; &lt;h:outputText value="#{item.lastname}" /&gt; &lt;/p:column&gt; &lt;/p:dataTable&gt; &lt;!-- Dialog for detailed-View --&gt; &lt;p:dialog id="personDialog" widgetVar="personDialog"&gt; &lt;p:panel id="detailPanel"&gt; &lt;h:panelGrid cellpadding="4"&gt; &lt;h:outputText value="prename: " /&gt; &lt;h:inputText value="#{personBean.selectedPerson.prename}" /&gt; &lt;h:outputText value="lastname: " /&gt; &lt;h:inputText value="#{personBean.selectedPerson.lastname}" /&gt; &lt;/h:panelGrid&gt; &lt;p:commandButton value="persist" actionListener="#{personBean.persist}" rendered="#{personBean.createView}" update="personForm" oncomplete="personDialog.hide()" /&gt; &lt;p:commandButton value="save" actionListener="#{personBean.merge}" update="personForm" rendered="#{personBean.editView}" oncomplete="personDialog.hide()" /&gt; &lt;/p:panel&gt; &lt;/p:dialog&gt; &lt;/h:form&gt; </code></pre> <p>The managedBean holds 2 boolean attributes createView/editView which appear in the render-attribute of the dialogs commandbuttons, a List for the DataTable, "selectedPerson" for Detail-View and another boolean to trigger edit-Button in case of row-selection in the DataTable.</p> <p>Code of Managed-Bean:</p> <pre><code>@ManagedBean(name = "personBean") @ViewScoped public class PersonMBean { private List&lt;Person&gt; personList; private Person selectedPerson; // row in the table has been selected private boolean rowSelected; // only render the active View private boolean createView; private boolean editView; // ... displayView and more possible @EJB private CRUDService crudService; public PersonMBean() { personList = new ArrayList&lt;Person&gt;(); selectedPerson = new Person(); } // CRUD-options public String persist(ActionEvent actionEvent) { crudService.persist(selectedPerson); return null; } public String merge(ActionEvent actionEvent) { selectedPerson = crudService.merge(selectedPerson); return null; } // switch between Views public String showCreateView() { selectedPerson = new Person(); createView = true; editView = false; return null; } public String showEditView() { createView = false; editView = true; return null; } public List&lt;Person&gt; getPersonList() { return crudService.getAllPerson(); } public Person getSelectedPerson() { if (selectedPerson == null) { selectedPerson = new Person(); } return selectedPerson; } public String select(SelectEvent event) { setRowSelected(true); return null; } public String unselect(UnselectEvent event) { setRowSelected(false); return null; } // getter + setter public void setPersonList(List&lt;Person&gt; personList) {this.personList = personList;} public void setSelectedPerson(Person selectedPerson) {this.selectedPerson = selectedPerson;} public boolean isRowSelected() {return rowSelected;} public void setRowSelected(boolean rowSelected) {this.rowSelected = rowSelected;} public void setCreateView(boolean createView) {this.createView = createView;} public boolean isCreateView() {return createView;} public void setEditView(boolean editView) {this.editView = editView;} public boolean isEditView() {return editView;} } </code></pre> <p>The problem is that while a single create/edit Person is successfull, after that a create-Action inserts an empty row and an edit-Action inserts a row with wrong values. When I reload the page, again the first action is ok, the second one fails... :(</p> <p>I suppose that the PersonMBean.selectedPerson has got an obsolete state but I can not figure it out nor can I find a solution to solve it.</p> <p>p.s. crudService just calls em.persist + em.merge</p> <p>Code of CRUDService:</p> <pre><code>@Stateless public class CRUDService { @PersistenceContext EntityManager em; public &lt;T&gt; T persist(T t) { this.em.persist(t); return t; } public &lt;T&gt; T merge(T t) { return this.em.merge(t); } @SuppressWarnings("unchecked") public List&lt;Person&gt; getAllPerson() { Query q = em.createQuery("from Person"); return q.getResultList(); } } </code></pre> <p>The web.xml looks like this:</p> <pre><code>&lt;?xml version="1.0" encoding="UTF-8"?&gt; &lt;web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0"&gt; &lt;context-param&gt; &lt;param-name&gt;javax.faces.PARTIAL_STATE_SAVING&lt;/param-name&gt; &lt;param-value&gt;false&lt;/param-value&gt; &lt;/context-param&gt; &lt;servlet&gt; &lt;servlet-name&gt;facesServlet&lt;/servlet-name&gt; &lt;servlet-class&gt;javax.faces.webapp.FacesServlet&lt;/servlet-class&gt; &lt;load-on-startup&gt;1&lt;/load-on-startup&gt; &lt;/servlet&gt; &lt;servlet-mapping&gt; &lt;servlet-name&gt;facesServlet&lt;/servlet-name&gt; &lt;url-pattern&gt;*.xhtml&lt;/url-pattern&gt; &lt;/servlet-mapping&gt; &lt;/web-app&gt; </code></pre> <p>I'm really struggling on this one, hope you can help me.</p> <p>If anything is wrong with formatting / style please let me know so I can update it.</p>
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    1. COyou don't need to do this.em.flush(); and this.em.refresh(t);. The Stateless EJB manages transactions automatically, in this case it will start a Transaction when persist method is called and commit it when that method returns.
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    2. COthx, I've fixed it, didnt solve the problem though
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    3. CO@katana0815 what was the fix?
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