区域更新错误内的 Tapestry 网格

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，其中源属性指向用户列表，从数据库下载。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 class 内，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，出现以下 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$SetupRenderPhase.render(ComponentPageElementImpl.java:181)
org.apache.tapestry5.internal.services.RenderQueueImpl.run(RenderQueueImpl.java:72)
org.apache.tapestry5.internal.services.PageRenderQueueImpl.render(PageRenderQueueImpl.java:124)
org.apache.tapestry5.internal.services.PageRenderQueueImpl.renderMarkup(PageRenderQueueImpl.java:142)
org.apache.tapestry5.internal.services.RenderCommandComponentEventResultProcessor.renderMarkup(RenderCommandComponentEventResultProcessor.java:78)
org.apache.tapestry5.internal.services.PageRenderQueueImpl$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.renderMarkup(TapestryModule.java:2141)

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

Answer 1

我发现该代码有几个问题：

网格的add:

"... is only used when a default model is created automatically." https://tapestry.apache.org/5.4/apidocs/org/apache/tapestry5/corelib/components/Grid.html

但同时您通过 model="adminTableModel".
ActionLink 上下文中的语法错误：context="${currAdmin.}"。最后多了一个点(.)
Don't use ${...} syntax for parameter bindings.

Answer 2

修复模型初始化问题后，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;
}

获取来源：

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

因此，按删除键，我得到了网格数据源当前显示页面的更新。希望这会对某人有所帮助）

区域更新错误内的 Tapestry 网格

Tapestry Grid inside Zone update error

java

asynchronous

tapestry