Ajax响应中的错误检查 [英] Error checking in Ajax Response

问题描述

我从API调用中获取了一个对象，我试图在将JSON数据呈现到视图之前进行错误检查.

I am getting a an object from my API call, i am trying to do an error checking before rendering the JSON data to my view.

function response(oResponse) {
        if(oResponse && oResponse!= null 
              && typeof oResponse === "object" &&  oResponse.responseCode !== null){
              // you're getting data in JSON
              // Use responseCode to proceed further
        }
}

以下是我的 JSON 响应

{"code": "100", "responseCode":"444", :result: "successful"}

我想知道 if条件是否正确?我是否在其中缺少某些东西，或者这是一个很大的状况.

I would like to know whether the if condition is right or not? Am i missing something in it or is it a big condition.

推荐答案

您可以将条件简化为 oResponse&&oResponse.responseCode (如果您关心的只是它不是 null 或 undefined )，并且具有 responseCode 属性，即不是 null 或 undefined .

You can probably simplify the condition to oResponse && oResponse.responseCode if all you care about is that it is not null nor undefined, and it has a responseCode property that is not null nor undefined.

• 对 oResponse！= null 的检查是多余的，因为 null 的评估结果为 false .
• 出于相同的原因，对 oResponse.responseCode！== null 的检查是多余的.
• 检查oResponse的 type ==="object" 是多余的，因为如果它是字符串或其他类型，则不会具有 responseCode 属性.
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• The check for oResponse != null is redundant since null evaluates to false.
• The check for oResponse.responseCode !== null is redundant for the same reason.
• The check for typeof oResponse === "object" is redundant since if it was a string or other type it wouldn't have a responseCode property.

请注意，如果 oResponse.responseCode === 0 或另一个"falsy"值，此条件将评估为false(即被认为是无效"的responseCode).

Note that if oResponse.responseCode === 0 or another "falsy" value, this condition will evaluate to false (i.e., that is considered an "invalid" responseCode).

@snowYetis关于错误处理程序的注释也是一个好主意，以防服务器上出现错误.它不会涵盖对无效的成功响应的验证.

@snowYetis comment about an error handler is also a good idea to have in there in case there is an error on the server. It won't cover the validation of a successful response that is invalid though.

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