聚合物铁阿贾克斯:如何将输入元素中的数据绑定到铁阿贾克斯的主体属性 [英] polymer iron-ajax : How to Bind data from input element to iron-ajax's body attribute

问题描述

我最近在将数据从输入元素绑定到 Iron-ajax 的body"属性时遇到问题.当我在聚合物 0.5 上使用 core-ajax 时，我可以轻松地绑定这样的值:

I recently have problems binding data from input element to iron-ajax's "body" attribute. When I used core-ajax on polymer 0.5, I can easily bind values like this:

<core-ajax
           id="ajax"
           method="POST" 
           contentType="application/json"
           url="{{url}}"   
           body='{"username":"{{username}}", "password":"{{password}}"}'
           handleAs="json"
           on-core-response="{{responseHandler}}">
</core-ajax>

现在我用铁阿贾克斯尝试了同样的事情.但它按字面意思发送{{username}}"和{{password}}"而不是它们的值.代码如下:

Now I tried the same thing with iron-ajax. But it sends literally "{{username}}" and "{{password}}" instead of their values. Here is the code:

<iron-ajax
           id="ajax"
           method="POST" 
           contentType="application/json"
           url="{{url}}"   
           body='{"username":"{{username}}", "password":"{{password}}"}'
           handle-as="json"
           on-response="responseHandler">
</iron-ajax>

如何让它工作?谢谢你的回答:)

How to make it work? Thank you for your answers :)

推荐答案

您可以为 ajax 主体声明一个计算属性.像这样

You can declare a computed property for the ajax body. Like so

properties: {
    ...
    ajaxBody: {
        type: String,
        computed: 'processBody(username, password)'
    }
},
processBody: function(username, password) {
    return JSON.stringify({username: username, password:password});
}

然后将其添加到 Iron-ajax 上

And then adding it on iron-ajax

<iron-ajax ... body="{{ajaxBody}}"></iron-ajax>

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