javascript - 使用功能文件更新 JSON 元素

Question

我想更新 JSON 文件中某个属性的值。如果我在代码中传递属性名称，我就可以更新它。但是，如果我尝试在功能文件中传递该属性名称，则会在 JSON 文件中创建附加元素。

工作代码:

await (function replaceJSONData(callback) {
        fs.readFile(requestPath, 'utf8', function (err, data) {
            var tempJSON = JSON.parse(data);
            tempJSON. = customer.personalDetails.customerFullName = "Amanda"
            console.log(tempJSON);
        });
    });

失败并在 JSON 请求中创建新 Node 元素:

//NOTE: nodeValue_1 is argument coming from feature file which has value as
|nodeValue_1                              |
|customer.personalDetails.customerFullName|

    this.Given(/^I replace (.*) and (.*) for rest service (.*) from (.*)$/, function (nodeValue_1, nodeValue_2, rest_url, filePath, callback) {
    var requestPath = requestDataPath+'\\'+rest_url+'-req.json';
    var currentAccount = fs.readFileSync(runTimeDataPath+'\\'+filePath, 'utf8');
    console.log(nodeValue_1);
    await (function replaceJSONData(callback) {
        fs.readFile(requestPath, 'utf8', function (err, data) {
            var tempJSON = JSON.parse(data);
//This will add new element called as nodeValue_1 in JSON - FAILS
            tempJSON.nodeValue_1 = "Amanda";
            console.log(tempJSON);
        });
    });
});

JSON 更新请求:

{
"customer": {
    "personalDetails": {
        "userTitle": "Mr",
        "customerFullName": "MrSchaumann",
        "dateOfBirth": "1980-05-08",
        "customerSureName": "Baganz"
    }
}
}

Answer 1

这里 tempJSON.nodeValue_1 不起作用，因为 nodeValue_1 是一个变量。尝试使用

tempJSON[nodeValue_1]

nodeValue_1 不会解析为点表示法的值，但如果您使用 tempJSON[nodeValue_1]，它将得到解析。

所以你的最终代码应如下所示:

//NOTE: nodeValue_1 is argument coming from feature file which has value as
|nodeValue_1                              |
|customer.personalDetails.customerFullName|

this.Given(/^I replace (.*) and (.*) for rest service (.*) from (.*)$/,
function (nodeValue_1, nodeValue_2, rest_url, filePath, callback) {
var requestPath = requestDataPath+'\\'+rest_url+'-req.json';
var currentAccount = fs.readFileSync(runTimeDataPath+'\\'+filePath, 'utf8');
console.log(nodeValue_1);
await (function replaceJSONData(callback) {
    fs.readFile(requestPath, 'utf8', function (err, data) {
        var tempJSON = JSON.parse(data);
        //This will update the value as you expect.
        tempJSON[nodeValue_1] = "Amanda";
        console.log(tempJSON);
    });
  });
});