Wicket 6.2 AbstractDefaultAjaxBehavior getCallbackUrl 不再解析 JS 变量 [英] Wicket 6.2 AbstractDefaultAjaxBehavior getCallbackUrl no longer resolves JS variables

问题描述

最近我一直致力于将一个使用 wicket 1.4.18 的大型 Web 应用程序升级到 6.2.我们有一种情况，我们将创建 javascript 变量来跟踪拖放列表中的位置.这只是代码的检票口，因为 js 一直有效并且没有改变.

Recently I have been working on upgrading a big web application that was using wicket 1.4.18 to 6.2. We had a situation where we would create javascript variables to keep track of positioning within a drag and drop list. This is just the wicket side of the code since the js has always worked and has not been changed.

ListItem.add(new AbstractDefaultAjaxBehavior()
{
    private static final long serialVersionUID = 1L;

    @Override
    public void onComponentTag(ComponentTag tag)
    {
        tag.put("ondrop", "var value = $(ui.item[0]).attr('hiddenvalue');"
            + this.getCallbackScript());
    }


    @Override
    public final CharSequence getCallbackUrl()
    {
        return super.getCallbackUrl() + "&hiddenvalue' + value + '";
    }
}

然而，我遇到的问题是 javascript 变量没有解析为值，现在在 getCallbackUrl 中被视为文字字符串(例如:'value' 而不是 5).这在 wicket 1.4.18 中并非如此，我不认为这个问题源于我们向 1.5.8 的迁移.

However the problem I am running into is the javascript variables are not resolving to values and are now being taken as literal strings (Ex: 'value' instead of 5) in the getCallbackUrl. This was not the case in wicket 1.4.18 and I don't believe this problem originated in our migration to 1.5.8.

最后我们只是希望能够使用

In the end we just want to be able to pull the value out using

@Override
protected void respond(AjaxRequestTarget target)
{
    getRequest().getRequestParameters().getParameterValue("hiddenvalue");
}

对此有什么建议吗?我希望我提供了足够的信息.在此先感谢您的帮助.其中一些内容有点超出我的知识范围，可能会让人不知道该往哪里看.

Any advice on this? I hope I have provided enough information. Thanks in advance for any help. Some of this is a little beyond my knowledge and can be intimidating not knowing where to look.

推荐答案

Wicket Ajax 已针对 Wicket 6 完全重写.请参阅 此页面 详细说明.

Wicket Ajax has been completely rewritten for Wicket 6. See this page for a detailed description.

在您的情况下，您应该使用新的 AjaxRequestAttributes 就像这样:

In your case, you should use the new AjaxRequestAttributes like that:

@Override
protected void updateAjaxAttributes(final AjaxRequestAttributes attributes) {
    super.updateAjaxAttributes(attributes);
    attributes.getExtraParameters().put("hiddenvalue", "value");
}

从请求中检索值仍然像以前一样工作.

Retrieval of the value from the request still works the same as before.

@Override
protected void respond(AjaxRequestTarget target)
{
    getRequest().getRequestParameters().getParameterValue("hiddenvalue");
}

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