Primefaces DataTable + LazyDataModel不會在請求範圍內傳遞setPropertyActionListener

Question

我有一個基於LazyDataModel的Primefaces DataTable。我成功地設法加載表中的數據，但我不能夠使用setPropertyActionListener顯示在對話框中選定的項目，也可以編輯行。我使用的請求範圍內，我注意到這個問題似乎在session範圍內需要解決，但我寧願使用前（查看範圍甚至不會在表中加載數據）。我已經嘗試覆蓋getRowData和getRowKey方法，但它們甚至不會被調用。當我不使用懶惰模型方法時，我沒有這個問題。

這可能是一個注射相關的問題，我缺少或LazyDataModel不會在會話範圍外工作嗎？

public class LazyDataModelBase<T> extends LazyDataModel<T> { 

private volatile AbstractFacade<T> facade; 

public LazyDataModelBase(AbstractFacade<T> facade) { 
    super(); 
    this.facade = facade; 
} 

public final AbstractFacade<T> getFacade() { 
    return facade; 
} 

public final void setFacade(AbstractFacade<T> facade) { 
    this.facade = facade; 
} 

@Override 
public List<T> load(int first, int pageSize, String sortField, 
     SortOrder sortOrder, Map<String, String> filters) { 
    List<T> list = facade.load(first, pageSize, 
      sortField, sortOrder, filters); 
    if (list == null) { 
     throw new RuntimeException("Problem."); 
    } 
    // I am using the following line for debugging: 
    // throw new RuntimeException(list.toString()); 
    setRowCount(facade.count()); 
    return list; 
} 

}

UserLazyDataModel看起來像這樣

public class UserLazyDataModel extends LazyDataModelBase<User> { 

    private UserFacade facade; 

    public UserLazyDataModel(UserFacade facade) { 
     super(facade); 
    } 

    public List<User> getRowData(String rowKey) { 
     return facade.findById(Integer.parseInt(rowKey)); // findById as defined in UserFacade 
    } 

    ... 

我支持bean看起來像這樣

@Named(value = "userController") 
@RequestScoped 
public class UserController implements Serializable { 

    private User current; 
    @EJB 
private UserFacade ejbFacade; 
private LazyDataModelBase<User> items; 
private Integer itemId; 
private int pageSize = 10; 

public UserController() { 
    items = new UserLazyDataModel(ejbFacade); 
} 

public UserFacade getUserFacade() { 
    return ejbFacade; 
} 

public void setUserFacade(UserFacade facade) { 
    this.ejbFacade = facade; 
    //items.setFacade(facade); 
} 

public User getSelected() { 
    if (current == null) { 
     this.current = new User(); 
    } 
    return current; 
} 

public void setSelected(User selected) { 
    this.current = selected; 
} 

public void setSelected(Integer id) { 
    this.itemId = id; 
    current = ejbFacade.find(id); 
} 

public Integer getItemId() { 
    return itemId; 
} 

public void setItemId(Integer id) { 
    this.itemId = id; 
    current = ejbFacade.findById(id); 
} 

public int getPageSize() { 
    return pageSize; 
} 

public void setPageSize(int pageSize) { 
    this.pageSize = pageSize; 
} 

private void setDefaultStatus() { 
    current.setStatusId(ejbFacade.getDefaultStatus()); 
} 

public String create() { 
    current.setDateCreated(new Date()); 
    if (current.getStatusId() == null) { 
     setDefaultStatus(); 
    } 
    current.hashPassword(); 

    try { 
     ejbFacade.create(current); 
     JsfUtil.addSuccessMessage("User guardado exitosamente"); 
     return "success-create"; 
    } catch (Exception e) { 
     JsfUtil.addErrorMessage(e, "A persistence error ocurred."); 
     return null; 
    } 
} 

public String prepareList() { 
    //current = null; 
    return "index?faces-redirect=true"; 
} 

public String prepareCreate() { 
    return "create?faces-redirect=true"; 
} 

public String prepareEdit() { 
    return "edit"; 
} 

public void onRowSelect() { 
    current = ejbFacade.findById(itemId); 
} 

public void update() { 
    try { 
     ejbFacade.edit(current); 
     JsfUtil.addSuccessMessage("User guardado exitosamente"); 
    } catch (Exception e) { 
     JsfUtil.addErrorMessage(e, "A persistence error ocurred."); 
    } 
} 

public void delete() { 
    try { 
     ejbFacade.remove(current); 
     current = null; 
     JsfUtil.addSuccessMessage("role deleted"); 
    } catch (Exception e) { 
     JsfUtil.addErrorMessage(e, ResourceBundle.getBundle("/Bundle").getString("PersistenceErrorOccured")); 
    } 
} 

public LazyDataModelBase<User> getItems() { 
    items.setFacade(ejbFacade); 
    items.setPageSize(pageSize); 
    return items; 
} 

public void setItems(LazyDataModelBase<User> model) { 
    this.items = model; 
} 

}

這是我的看法

<h:form prependId="false"> 
     <p:commandButton immediate="true" style="margin: 10px 0;" value="Nuevo" icon="ui-icon-plus" action="#{userController.prepareCreate}" ajax="false" /> 
    </h:form> 
    <h:form id="listForm"> 
     <br /> 
     <p:growl id="messages" showDetail="true"/> 
     <p:dataTable var="item" value="#{userController.items}" rows="#{userController.pageSize}" 
        lazy="true" selectionMode="single" rowKey="#{item.userId}" selection="#{userController.selected}" 
        paginator="true" id="itemsTable" rowsPerPageTemplate="10,30,50"> 


      <p:ajax event="rowSelect" listener="#{userController.onRowSelect}" update=":listForm:itemDisplay" oncomplete="itemDialog.show()" /> 

      <p:column headerText="ID" id="userId" sortBy="#{item.userId}" style="width: 10px;"> 
       #{item.userId} 
      </p:column> 

      <p:column headerText="First Name" id="first-name" sortBy="#{item.firstName}"> 
       #{item.firstName} 
      </p:column> 

      <p:column headerText="Last Name" id="last-name" sortBy="#{item.lastName}"> 
       #{item.lastName} 
      </p:column> 

      <p:column headerText="Email" id="email" sortBy="#{item.email}" filterBy="#{item.email}"> 
       #{item.email} 
      </p:column> 

      <p:column headerText="User" id="name" sortBy="#{item.username}"> 
       #{item.username} 
      </p:column> 

      <p:column headerText="birthdate" id="birthdate" sortBy="#{item.birthdate}"> 
       <h:outputText value="#{item.birthdate}" > 
        <f:convertDateTime type="date" pattern="yyyy/MM/dd"/> 
       </h:outputText> 
      </p:column> 

      <p:column headerText="role" id="status" sortBy="#{item.statusId.name}"> 
       #{item.statusId.name} 
      </p:column> 



      <p:column style="width:32px;"> 
       <h:panelGrid columns="3" class="datarow-icons"> 
        <p:commandButton icon="ui-icon-trash" update=":listForm:itemsTable :listForm:confirmDelete" 
            oncomplete="deleteDialog.show()"> 
         <f:setPropertyActionListener value="#{item}" target="#{userController.selected}" /> 
        </p:commandButton> 

        <p:commandButton icon="ui-icon-pencil" immediate="true" action="#{userController.prepareEdit}" ajax="false"> 
         <f:setPropertyActionListener value="#{item}" target="#{userController.selected}" /> 
        </p:commandButton> 

        <p:commandButton id="select-button" 
            update=":listForm:itemDisplay" 
            oncomplete="itemDialog.show()" icon="ui-icon-search" 
            title="view" > 
         <f:setPropertyActionListener value="#{item}" target="#{userController.selected}" /> 
        </p:commandButton> 
       </h:panelGrid> 
      </p:column> 
     </p:dataTable> 
     <p:dialog widgetVar="itemDialog" resizable="false" 
        showEffect="explode" hideEffect="explode" header="Item Detail"> 
      <p:panelGrid columns="2" id="itemDisplay" style="width: 250px;"> 
       <h:outputText value="ID: " /> 
       <h:outputText value="#{userController.selected.userId}" /> 

       <h:outputText value="Name: " /> 
       <h:outputText value="#{userController.selected.username}" /> 

       <h:outputText value="Description: " /> 
       <h:outputText value="#{userController.selected.firstName}" /> 
      </p:panelGrid> 
     </p:dialog> 
     <p:confirmDialog id="confirmDelete" header="Confirm delete" 
         widgetVar="deleteDialog" severity="alert" 
         showEffect="fade" hideEffect="fade" 
         closable="false" 
         message="¿Realmente desea borrar '#{userController.selected.toString()}' ?"> 
      <p:commandButton id="decline" value="Not Yet" 
          onclick="deleteDialog.hide();" type="button" /> 
      <p:commandButton id="accept" value="Confirmar" 
          update=":listForm" 
          oncomplete="deleteDialog.hide();" 
          action="#{userController.delete}" ajax="false"> 
      </p:commandButton> 
     </p:confirmDialog> 
    </h:form> 

Answer 1

我設法讓rowSelect在我UserLazyDataModel覆蓋getRowData（LazyDataModelBase的一個子類我展示）如下工作：

@Override 
public User getRowData(String rowKey) { 
    try { 
     return ((UserFacade) getFacade()).findById(Integer.parseInt(rowKey)); 
    } catch (Exception e) { 
     return null; 
    } 

} 

和刪除從

rowkey="#{item.userId}" 

屬性dataTable聲明。我聲明在子類UserLazyDataModel一個門面，這是默認的父類LazyDataModelBase（設置爲null）不同。將溶液通過getFacade方法的手段最後澆鑄到UserFacade刪除從子類和訪問父FIEL此字段。

setPropertyActionListener還沒有工作。