Первичные данные DataTable, не обновляющиеся после передачи параметров между управляемыми компонентами

Question

В настоящее время я работаю с файлами Primefaces с простыми CRUD-операциями. Этот Datatable показывает задачи рабочего списка, который ранее был выбран в другом файле данных, который отображает рабочие списки проектов. Чтобы получить выбранный рабочий список, я вставляю WorkListManagedBean в TaskManagedBean. . Когда я создать или удалить задачу из выбранного списка работы, это было сделано успешно в базе данных, но DataTable не Updation :(Вот моя задача Managed Bean:

@ManagedBean(name = "taskMBean") 
@ViewScoped 
public class TaksMBean implements Serializable { 

    @ManagedProperty("#{workListMBean}") 
    private WorkListMBean workListMBean; 
    @Inject 
    private TaskBusinessLocal taskBusinessLocal; 
    @Inject 
    private ResourceBusinessLocal resourceBusinessLocal; 
    private String description, code; 
    private Date startDate, endDate; 
    private Status status; 
    private List<Resource> resources, resourceslist; 
    private List<Task> filteredTasks, tasks; 
    private Task selectedTask; 
    private WorkList selectedWorkList; 

    @PostConstruct 
    public void init() { 
    selectedTask = new Task(); 
    selectedWorkList = workListMBean.getSelectedWorkList(); 
    } 

    public List<Task> getTasks() { 
    return tasks=workListMBean.getTasksList(); 
    } 

    public void setTasks(List<Task> tasks) { 
    this.workListMBean.setTasks(tasks) ; 
    } 

    public List<Resource> getAllResources() { 
    return resourceBusinessLocal.allResources(); 
    } 

    public Status[] getAllStatus() { 
    return Status.values(); 
    } 

    public String addTask() { 
     taskBusinessLocal.addTask(description, code, startDate, 
     endDate,status,  
     selectedWorkList, resources); 
     return "index"; 
    } 

    public String upDateTask() { 
     taskBusinessLocal.updateTask(selectedTask); 
     return "index"; 
    } 

    public String deleteTask() { 
     taskBusinessLocal.deleteTask(selectedTask); 
     return "index"; 
    } 

    public Status getStatus() { 
     return status; 
    } 

    public void setStatus(Status status) { 
     this.status = status; 
    } 

    public String getDescription() { 
    return description; 
    } 

    public void setDescription(String description) { 
     this.description = description; 
    } 

    public Date getStartDate() { 
     return startDate; 
    } 

    public void setStartDate(Date startDate) { 
     this.startDate = startDate; 
    } 

    public Date getEndDate() { 
     return endDate; 
    } 

    public void setEndDate(Date endDate) { 
     this.endDate = endDate; 
    } 

    public String getCode() { 
    return code; 
    } 

    public void setCode(String code) { 
    this.code = code; 
    } 

    public List<Resource> getResources() { 
     return resources; 
    } 

    public void setResources(List<Resource> resources) { 
     this.resources = resources; 
    } 

    public List<Resource> getResourceslist() { 
     return resourceslist; 
    } 

    public void setResourceslist(List<Resource> resourceslist) { 
     this.resourceslist = resourceslist; 
    } 

    public List<Task> getFilteredTasks() { 
     return filteredTasks; 
    } 

    public void setFilteredTasks(List<Task> filteredTasks) { 
    this.filteredTasks = filteredTasks; 
    } 

    public Task getSelectedTask() { 
    return selectedTask; 
    } 

    public void setSelectedTask(Task selectedTask) { 
     this.selectedTask = selectedTask; 
    } 

    public WorkListMBean getWorkListMBean() { 
     return workListMBean; 
    } 

    public void setWorkListMBean(WorkListMBean workListMBean) { 
    this.workListMBean = workListMBean; 
    } 

    public WorkList getSelectedWorkList() { 
     return workListMBean.getSelectedWorkList(); 
    } 
    } 

и вот моя страница JSF:

<ui:composition template="/templates/layout.xhtml" 
      xmlns="http://www.w3.org/1999/xhtml" 
      xmlns:f="http://java.sun.com/jsf/core" 
      xmlns:h="http://java.sun.com/jsf/html" 
      xmlns:ui="http://java.sun.com/jsf/facelets" 
      xmlns:p="http://primefaces.org/ui" 
      xmlns:c="http://java.sun.com/jsp/jstl/core"> 

<ui:define name="content"> 

    <h:form id="form"> 
     <p:contextMenu for="tasks"> 
      <p:menuitem value="View" update="taskView" 
         icon="ui-icon-search" oncomplete="taskDialogView.show()"/> 
      <p:menuitem value="Update" update="taskUpdate" 
         icon="ui-icon-arrowrefresh-1-w" 
         oncomplete="taskDialogUpdate.show()"/> 
      <p:menuitem value="Delete" update="tasks" 
         icon="ui-icon-close" onclick="confirmation.show();"/> 
     </p:contextMenu> 
     <p:dataTable id="tasks" value="#{taskMBean.tasks}" 
        var="item" rowsPerPageTemplate="5,10,15,20,25,30" 
        paginator="true" rows="10" 
        filteredValue="#{taskMBean.filteredTasks}" 
        selection="#{taskMBean.selectedTask}" 
        rowKey="#{item.id}" selectionMode="single"> 
     <p:ajax event="rowSelect" update=":form:tasks, :form:taskView , 
        :form:taskUpdate , :form:confirmDelete"/> 
     <f:facet name="header" > 
     <p:outputLabel value="List of WorkList (# 
        {taskMBean.selectedWorkList.code}) tasks"/> 
     </f:facet> 
     <p:column sortBy="#{item.description}" filterBy="#{item.description}"> 
       <f:facet name="header"> 
        <p:outputLabel value="Description"/> 
       </f:facet> 
       <p:outputLabel value="#{item.description}"> 
       </p:outputLabel> 
      </p:column> 
      <p:column sortBy="#{item.code}" filterBy="#{item.code}"> 
       <f:facet name="header"> 
        <p:outputLabel value="Code"/> 
       </f:facet> 
       <p:outputLabel value="#{item.code}"> 
       </p:outputLabel> 
      </p:column> 
      <p:column sortBy="#{item.startDate}" filterBy="#{item.startDate}"> 
       <f:facet name="header"> 
        <p:outputLabel value="Start Date"/> 

       </f:facet> 
       <h:outputText value="#{item.startDate}"> 
        <f:convertDateTime pattern="MM/dd/yyyy" /> 
       </h:outputText> 
      </p:column> 
      <p:column sortBy="#{item.endDate}" filterBy="#{item.endDate}"> 
       <f:facet name="header"> 
        <p:outputLabel value="End Date"/> 

       </f:facet> 
       <h:outputText value="#{item.endDate}"> 
        <f:convertDateTime pattern="MM/dd/yyyy" /> 
       </h:outputText> 
      </p:column> 
      <f:facet name="footer"> 
       <p:commandButton value="New Task" oncomplete="TaskDialogNew.show()" 
        icon="ui-icon-star" title="New Task"/> 
       <p:commandButton value="Delete Task" actionListener="# 
        {taskMBean.deleteTask()}" update="tasks" icon="ui-icon-trash" 
        style="margin-left: 5px"/> 
       <p:button value="Back" outcome="WorkLists.xhtml" icon="ui-icon- 
        arrowthick-1-w" style="margin-left: 900px"/> 
      </f:facet> 
     </p:dataTable> 
     <p:dialog header="Task Detail" widgetVar="taskDialogView" resizable="false" 
        showEffect="clip" hideEffect="fold" style="position: absolute ;" 
        id="dialogView"> 
      <p:panelGrid id="taskView" columns="2" > 
       <f:facet name="header"> 
        <p:graphicImage value="/images/task.png"/> 
       </f:facet> 
       <p:outputLabel value="Code:" /> 
       <p:outputLabel value="#{taskMBean.selectedTask.code}" title="Code" /> 
       <p:outputLabel value="Description:" /> 
       <p:outputLabel value="#{taskMBean.selectedTask.description}" /> 
       <p:outputLabel value="Resources"/> 
       <p:dataList value="#{taskMBean.selectedTask.resources}" var="item" 
          itemType="square"> 
          #{item.name} (#{item.code}) 
       </p:dataList> 
       <p:outputLabel value="Start Date"/> 
       <p:outputLabel value="#{taskMBean.selectedTask.startDate}" > 
        <f:convertDateTime pattern="MM/dd/yyyy" /> 
       </p:outputLabel> 
       <p:outputLabel value="End Date"/> 
       <h:outputText value="#{taskMBean.selectedTask.endDate}" title="EndDate"> 
        <f:convertDateTime pattern="MM/dd/yyyy" /> 
       </h:outputText> 
       <p:outputLabel value="Status"/> 
       <p:outputLabel value="#{taskMBean.selectedTask.status}"/> 
      </p:panelGrid> 
     </p:dialog> 
     <p:dialog header="task Update" widgetVar="taskDialogUpdate" resizable="false" 
        showEffect="clip" hideEffect="fold" style="position: absolute ;" 
        id="dialogUpdate"> 
      <p:panelGrid id="taskUpdate" columns="2" > 
       <f:facet name="header"> 
        <p:graphicImage value="/images/task.png"/> 
       </f:facet> 
       <p:outputLabel value="Code:" for="code" style="width: 242px"/> 
       <p:inputText id="code" value="#{taskMBean.selectedTask.code}" 
        style="width: 236px" required="true" requiredMessage="The Code field 
        is required."/> 
       <p:outputLabel value="Description:" for="description" /> 
       <p:inputTextarea id="description" 
        value="# {taskMBean.selectedTask.description}" required="true" 
        requiredMessage="The Description 
       field is required."/> 
       <p:outputLabel value="Resources" for="resources"/> 
       <p:selectCheckboxMenu id="resources" value="# 
        {taskMBean.selectedTask.resources}" style="width: 241px" 
        label="Select Resources" required="true" requiredMessage="The List of 
        Resources field is required."> 
        <f:selectItems value="#{taskMBean.allResources}" var="item" 
        itemLabel="#{item.name}" itemValue="#{selectedTask.resources}" /> 
        <f:converter 
        converterId="com.gis.plannerplus.converters.ObjectConverterResource 
         " /> 
     </p:selectCheckboxMenu> 
        <p:outputLabel value="Status" for="status"/> 
       <p:selectOneMenu id="status" value="#{taskMBean.selectedTask.status}" 
        style="width: 241px" required="true" requiredMessage="The customer 
        field is required."> 
        <f:selectItems value="#{taskMBean.allStatus}" var="s" itemLabel="# 
       {s.status}"/> 
       </p:selectOneMenu> 

       <p:outputLabel for="startdate" value="Start " /> 
       <p:calendar id="startdate" required="true" label="StartDate" 
       style="width: 240px" binding="#{startdate}" 
          effect="fold" value="# 
       {taskMBean.selectedTask.startDate}" pattern="dd/MM/yy" > 
        <p:ajax process="startdate finishDate" update="toDateMsg" /> 
       </p:calendar> 
       <p:outputLabel for="finishDate" value="End " /> 
       <p:calendar id="finishDate" label="FinishDate" style="width: 240px" 
       pattern="dd/MM/yy" 
          effect="fold" value="#{taskMBean.selectedTask.endDate}" > 
        <f:attribute name="startDate" value="#{startdate.value}" /> 
        <f:validator validatorId="validator.dateRangeValidator" /> 
        <p:ajax process="startdate finishDate" update="toDateMsg" /> 
        <p:message for="finishDate" id="toDateMsg" > 
        </p:message> 
       </p:calendar> 
      </p:panelGrid> 
      <p:commandButton value="Clear" type="reset" icon="ui-icon-arrowrefresh-1-n" 
      styleClass="ui-priority-primary"/> 
      <p:commandButton value="Save" ajax="false" icon="ui-icon-circle-check" 
      styleClass="ui-priority-primary" action="#{taskMBean.upDateTask()}" /> 
     </p:dialog> 
     <p:confirmDialog id="confirmDelete" message="Are you sure ?" appendTo="@(body)" 
         header="Delete Task?" severity="alert" 
      widgetVar="confirmation" style="width: auto"> 
      <p:commandButton id="confirm" value="Yes" ajax="false" /> 
      <p:commandButton id="decline" value="No" onclick="confirmation.hide();" 
      type="button" /> 
     </p:confirmDialog> 
    </h:form> 


    <h:form id="newTaskForm"> 
     <p:dialog header="New Task" widgetVar="TaskDialogNew" resizable="false" 
        showEffect="clip" hideEffect="fold" style="position: absolute ;" 
    id="dialogNewTask"> 
      <p:panel id="panel"> 
       <p:messages id="messages" /> 
       <p:panelGrid id="newTask" columns="2" style="margin-bottom:10px" > 
        <f:facet name="header"> 
         <p:graphicImage value="/images/task.png"/> 
        </f:facet> 
        <p:outputLabel value="Code:" for="code" /> 
        <p:inputText id="code" value="#{taskMBean.code}" style="width: 
     236px" required="true" requiredMessage="The Code field is required."/> 
        <p:outputLabel value="Description:" for="description" /> 
        <p:inputTextarea id="description" value="#{taskMBean.description}" 
     style="width: 236px" required="true" requiredMessage="The Description field is 
      required."/> 


        <p:outputLabel value="Resources" for="resources"/> 
        <p:selectCheckboxMenu id="resources" value="#{taskMBean.resources}" 
     style="width: 241px" label="Select Resources" > 
         <f:selectItems value="#{taskMBean.allResources}" var="item" 
     itemLabel="#{item.name}" itemValue="#{resources}" /> 
         <f:converter 
     converterId="com.gis.plannerplus.converters.ObjectConverterResource" /> 
        </p:selectCheckboxMenu> 
         <p:outputLabel value="Status" for="status"/> 
        <p:selectOneMenu id="status" value="#{taskMBean.status}" 
     style="width: 241px" required="true" requiredMessage="The customer field is 
     required."> 
         <f:selectItems value="#{taskMBean.allStatus}" var="s" 
     itemLabel="#{s.status}"/> 
        </p:selectOneMenu> 
        <p:outputLabel for="startDate" value="Start " /> 
        <p:calendar id="startDate" required="true" label="StartDate" 
     style="width: 260px" binding="#{startDate}" 
           effect="fold" value="#{taskMBean.startDate}" 
      pattern="dd/MM/yy" > 
         <p:ajax process="startDate finishDate" update="toDateMsg" /> 
        </p:calendar> 
        <p:outputLabel for="finishDate" value="End " /> 
        <p:calendar id="finishDate" label="FinishDate" style="width: 
      240px" 
           effect="fold" required="true" value="# 
           {taskMBean.endDate}" > 
         <f:attribute name="startDate" value="#{startDate.value}" /> 
         <f:validator validatorId="validator.dateRangeValidator" /> 
         <p:ajax process="startDate finishDate" update="toDateMsg" /> 
         <p:message for="finishDate" id="toDateMsg" > 
         </p:message> 
        </p:calendar> 
       </p:panelGrid> 
       <p:commandButton type="reset" value="Clear" icon="ui-icon- 
      arrowrefresh-1-n" styleClass="ui-priority-primary"/> 
       <p:commandButton value="Submit" ajax="false" process="@form" 
      update=":form:tasks, :growl" oncomplete=" handleSubmitRequest(xhr, status, 
      args, 'TaskDialogNew','newTaskForm');" actionListener="#{taskMBean.addTask 
      ()}"/> 
      </p:panel> 
     </p:dialog> 
    </h:form> 

    <p:growl id="growl" showDetail="true" life="5000" /> 
    <script> 
       function handleSubmitRequest(xhr, status, args, dialogName, formName) { 
        dialog = jQuery('#' + dialogName); 
        if (args.validationFailed) { 
         dialog.effect("shake", {times: 3}, 100); 
        } else { 
         clearForm(formName); 
         TaskDialogNew.hide(); 
         taskDialogUpdate.hide(); 

        } 
       } 
       function clearForm(formName) { 
        jQuery('#' + formName).each(function() { 
         this.reset(); 
        }); 
       } 

    </script> 
    </ui:define> 
    </ui:composition> 

Answer 1

Я использовал запрос JPQL для извлечь все задачи выбранной Worklist в базе данных Итак, я определен именованный запрос в классе сущностей Задача:

@NamedQuery(name = "task.findByWorklist", query = "select t from Task t where 
    t.worklist=:worklist"), 

Затем я добавил этот метод в менеджер класса Task:

@Override 
    public List<Task> findByWorklist(WorkList worklist) { 
    Query query = 
    em.createNamedQuery("task.findByWorklist").setParameter("worklist", worklist); 
    return (List<Task>) query.getResultList(); 
    } 

Наконец, я поместил методы получения и установки в TaskManagedBean класса:

public List<Task> getTasks() { 
    return tasks=workListMBean.getTasksList(); 
    } 

    public void setTasks(List<Task> tasks) { 
    this.workListMBean.setTasks(tasks) ; 
    } 

этим методом:

public List<Task> getTasks() { 
    return tasks=taskManagerLocal.findByWorkList(selectedWorkList); 
} 

Таким образом, я мог бы получить задания из выбранного рабочего списка из базы данных, и datatable отлично обновляется из базы данных после операции CRUD.

Answer 2

Primeface имеет атрибут Update в случае удаления вы можете сделать следующие вещи:..

<p:commandButton id="confirm" value="Yes" update="form:tasks" />