java - 区域内的 Tapestry 网格更新错误

Question

我正在尝试完成一个简单的任务:从数据库中删除一条记录，更新网格，其源属性指向从数据库下载的用户列表。我在 tml 中有一个 Grid 组件:

<div t:type="zone" t:id="deleteZone" id="deleteZone">
<table t:type="grid" source="allAdmins" row="currAdmin" empty="blabla" model="adminTableModel"
           add="delete,lock">
        <p:deleteCell>
          <t:actionlink t:id="delete" context="${currAdmin.}" zone="deleteZone">
              Delete admin
          </t:actionlink> <!--context=""-->
        </p:deleteCell>
    </table>
</div>

在页面类中，我有:

public List<AUser> getAllAdmins() {
    return webHelpService.getAllUsers(true);
}

@InjectComponent
private Zone deleteZone;
Object onActionFromDelete(int code) {
    Admins adminToChange = dao.getAdmin(code);
    if(code!=0) {
       dao.deleteAdmin(adminToChange);
    }
    return deleteZone.getBody();
}

但是当我按下删除按钮时，我收到以下 Tapestry 错误:

org.apache.tapestry5.runtime.ComponentEventException: Render queue error in SetupRender.
location: points to line <t:actionlink t:id="delete" context="${currAdmin.code}" zone="deleteZone">

org.apache.tapestry5.ioc.internal.OperationException
location: point to Grid.tml line <thead t:id="columns"/>

java.lang.NullPointerException
 org.apache.tapestry5.internal.beaneditor.BeanModelUtils.add(BeanModelUtils.java:74)
org.apache.tapestry5.internal.beaneditor.BeanModelUtils.modify(BeanModelUtils.java:42)
org.apache.tapestry5.corelib.components.Grid.getDataModel(Grid.java:523)
org.apache.tapestry5.corelib.components.GridColumns.setupRender(GridColumns.java:112)
org.apache.tapestry5.corelib.components.GridColumns.setupRender(GridColumns.java)
org.apache.tapestry5.internal.structure.ComponentPageElementImpl$SetupRenderPhase.invokeComponent(ComponentPageElementImpl.java:174)
org.apache.tapestry5.internal.structure.ComponentPageElementImpl$AbstractPhase.invoke(ComponentPageElementImpl.java:133)
org.apache.tapestry5.internal.structure.ComponentPageElementImpl$SetupRenderPhase.render(ComponentPageElementImpl.java:181)
org.apache.tapestry5.internal.services.RenderQueueImpl.run(RenderQueueImpl.java:72)
org.apache.tapestry5.internal.services.PageRenderQueueImpl.render(PageRenderQueueImpl.java:124)
org.apache.tapestry5.internal.services.PageRenderQueueImpl$1.renderMarkup(PageRenderQueueImpl.java:142)
org.apache.tapestry5.internal.services.RenderCommandComponentEventResultProcessor.renderMarkup(RenderCommandComponentEventResultProcessor.java:78)
org.apache.tapestry5.internal.services.PageRenderQueueImpl$Bridge.renderMarkup(PageRenderQueueImpl.java:62)
org.apache.tapestry5.internal.services.PageRenderQueueImpl.renderPartial(PageRenderQueueImpl.java:159)
org.apache.tapestry5.internal.services.PartialMarkupRendererTerminator.renderMarkup(PartialMarkupRendererTerminator.java:45)
org.apache.tapestry5.services.TapestryModule$37.renderMarkup(TapestryModule.java:2141) 

虽然网格行的部分更改效果很好(未包含该代码)，但我无法使用网格组件重新加载整个区域。 谁能为我指明方向，以完成用户的动态删除操作？ 任何帮助将不胜感激!

Answer 1

解决模型初始化问题后，我得到了以下工作代码:

<t:zone t:id="deleteZone" id="deleteZone">
        <table t:type="grid" source="adminsSource" rowsPerPage="5" row="currAdmin" inPlace="true" model="adminTableModel" empty="Admins not found" class="t-data-grid table table-bordered">
...
<p:deleteCell>
                <t:actionlink t:id="delete" context="currAdmin.code" zone="deleteZone"
                    ${message:delete}
                </t:actionlink>
</p:deleteCell>

获取模型:

public BeanModel getAdminTableModel() {
        BeanModel<Admin> model;
        model = beanModelSource.createDisplayModel(Admin.class, messages);
        ...
        return model;
}

获取源码:

public GridDataSource getAdminsSource() {
        return new HibernateGridDataSource(session, Admin.class);
}

因此，按删除键，我会更新当前显示的网格数据源页面。希望这会对某人有所帮助)