ColdFusion AJAX:在参数中未定义元素 [英] ColdFusion AJAX: Element is undefined in arguments

问题描述

我正在做一些AJAX ColdFusion测试，使用AJAX将数据发送到ColdFusion服务器时遇到问题. 这是我拥有的HTML代码:

I'm doing some AJAX ColdFusion testing and I have an issue while sending data to ColdFusion server using AJAX. Here is the HTML code I have:

<form method="post">
    <p>
        <input type="text" id="user_name" name="name" placeholder="name" value="test" />
        <input type="text" id="user_email" name="email" placeholder="email" value="abc" />
    </p>
    <input type="button" value="Find Out" class="ajax_form"/>
</form>

<p id="insert"></p>

JS:

$(document).ready(function (){
    $(".ajax_form").click(function (){
        var that = $(this).parent(),
            url = "ajax.cfc",
            type = that.attr('method'),
            test = {};

        that.find('[name]').each(function(index, value){
            var that = $(this),
                name = that.attr('name'),
                value = that.val();

            test[name] = value;
        });

        console.log(test.name);

        $.ajax({
            url: url,
            type: type,
            data: {
                method: "testCheck",
                name: test.name,
                email: test.email,
                array: test
            },

            success: function (responce){
                document.getElementById('insert').innerHTML = responce;
            },
            error: function (xhr, textStatus, errorThrown){
                alert(errorThrown);
            }
        });
    });
});

ajax.cfm非常简单，看起来像这样.

ajax.cfm is really simple and looks like this.

<cfcomponent output="false">
    <cffunction name="testCheck" access="remote" returnformat="plain" returnType="string" output="false">
        <cfargument name="name" type="string" required="false" />
        <cfargument name="email" type="string" required="false" />
        <cfargument name="array" required="false" />

        <cfset var string = " " />

        <cfif (arguments.name) eq "test">
            <cfset string = arguments.array/>
        <cfelse>
            <cfset string = "incorrect" />
        </cfif>

        <cfreturn string />
    </cffunction>
</cfcomponent>

问题是未定义cf参数(我得到的错误是:"500(ARGUMENTS中未定义元素数组)")或在设置它时获取默认值.我猜想这与我要发送的对象的数据类型有关，但是我无法提出任何解决方案.这种情况下完全有可能使用这种类型的数据吗?

The problem is that cf argument isn't defined (the error I get: "500 (Element ARRAY is undefined in ARGUMENTS)") or gets default value when I set it. I have a guess that this is about data type of the object I'm sending, but I can't come up with any solution. Is it possible at all to use this type of data as cfargument is this case?

推荐答案

该错误主要是由于以下原因:

The error is mainly due to following reasons:

1. array作为对象(JSON):

1. array as an object(JSON):

您将array作为对象发送，因此jQuery将使用application/x-www-form-urlencoded的contentType发出请求(因为您尚未明确指定).

You are sending array as an object so the request will be made with a contentType of application/x-www-form-urlencoded by jQuery (as you have not explicitly specified it).

因此，对象(在这种情况下为array)将被序列化为名称/值对，并将被附加在URL中，因此服务器将获得以下参数(不需要):

Hence, the object(array in the case) will be serialized into name/value pairs and will be appended in the URL so, the server will get following arguments(which was not desired):

array[name] = 'test'

array[email] = 'abc'

因此，您必须从客户端序列化数据，然后像这样在服务器端反序列化:

So, you have to serialize the data from client side and then deserialize at the server side like this:

   $.ajax({
        url: url,
        type: type,
        data: {
            method: "testCheck",
            name: test.name,
            email: test.email,
            array: JSON.stringify(test) <--- Serialize here -->
        }

        , success: function (responce){
            document.getElementById('insert').innerHTML = responce;
        }
        , error: function (xhr, textStatus, errorThrown){
            alert(errorThrown);
        }
    });

<--- Deserialize --->
<cfset local.array = deserializeJSON(arguments.array)>

1. 参数数组没有默认值

参数array没有默认值，并且在请求期间未传递(由于上述原因)，因此它将是undefined.

The argument array has no default value and was not passed during the request(due to the above mentioned reason) so, it would be undefined.

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