使用异步数据更新Dojo Dijit FilteringSelect的存储 [英] Updating Dojo Dijit FilteringSelect's store with asynchonous data

问题描述

我在内部网上下文中使用了Zend + Dojo表单。当窗体上更改所选状态时，我们需要更新县列表。使用HTML，您只需解析json响应（或仅提供html片段的选项）并更新select的innerhtml。然而，在Dojo中这样做已被证明是非常复杂的。

简而言之，我已经定义了一种通用方法，允许您将一个onBlur更新设置为一个表单域。这链接到控制器动作，使用函数参数调用数据库，并返回单例响应（我们已经处理好了）或列表响应。如果我们收回列表，我们需要更改列表中选择的选项。

所有这些都可以正常运行;我们在response.data中得到一个有效的json响应。这里是问题所在。如何只更新现有的商店（检查显示它是一个_comboBoxDataStore）？因为它是自动生成的，所以我不能使用不同种类的商店声明选择。

有没有什么办法强制交换商店？主要的关键是无论我做什么，都必须在Internet Explorer中工作;我使用Firefox只是为了更好地了解我正在使用的对象。

作为一个副问题，有没有人知道为什么_comboBoxDataStore不能更新？其他框架允许商店的无缝更新，例如extJS。在组合框中设计限制是否有任何推理，因此无法更新，这是从原始HTML中降下来的？或者我错过了一个明显的解决方案，它不涉及玩杂耍的深奥对象列表？

解决方案

根据RiverC的帖子我的更新组合工具的方法如下所示：

 ，updateData：function（data）{
 var storeData = data：data，id：'attrFilterStore'}; 
 var newStore = new dojo.data.ItemFileWriteStore（{data：data}）; 
 this.element.store = newStore; 
 this.element.startup（）; 
} 
  

其中 this.element 是一个引用到 FilteringSelect 对象。

方法 updateData 是一个来自ajax请求的回调函数，它接收到带有RiverC结构的JSON的JSON。 p>

I'm using Zend + Dojo form in an intranet context. We need to update a list of counties when the selected state is changed on a form. With HTML you would just parse the json response (or just provide a html fragment of options) and update the innerhtml of the select. However, doing so in Dojo has proved to be prohibitively complex.

In short, I have defined a generic method that allows you to set an onBlur update to a form field. This links to a Controller action that calls the database with a function arguments, and gets back either a singleton response (which we handle okay already) or a list response. If we get back a list, we need to alter the options in a select with that list.

All of this works fine so far; we get a valid json reponse with a nice list in response.data. Here's where the problem is. How can I simply update the existing store (examination reveals it is a _comboBoxDataStore)? I cannot declare the select with a different kind of store, since it is auto-generated.

Is there any way to brute force a swap of stores? The main key is that whatever I do it has to work in Internet Explorer; My use of Firefox is only to allow better insight into the objects I'm working with.

As a side question, does anyone know why _comboBoxDataStore cannot be updated? Other frameworks allow for pretty seamless updating of stores, like for instance, extJS. Is there any reasoning behind designing a limitation into the combobox so it cannot be updated, which is a step down from raw HTML? Or am I missing the obvious solution that doesn't involve juggling a list of esoteric objects?

解决方案

Based on post of RiverC my method for updating the combo works fine like this:

, updateData : function(data) {
    var storeData = {data: data, id:'attrFilterStore'};
    var newStore = new dojo.data.ItemFileWriteStore({data: data});
    this.element.store = newStore;
    this.element.startup();
}

Where "this.element" is a reference to the FilteringSelect object.
The method "updateData" is a callback function from an ajax request which receives JSON with the structure RiverC posted.

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