Question

我有一个Node.js API，它返回如下格式的JSON：

[
    {
        "id" : "1",
        "tstamp": "2017-06-01T00:00:00.000Z",
        "dmemberprofiles","48400"
        "dgroupprofiles","4800"
        "msclprofiles","400"
    },
    {
        "id" : "2",
        "tstamp" : "2017-06-02T00:00:00.000Z",
        "dmemberprofiles","48700"
        "dgroupprofiles","4900"
        "msclprofiles","410
    }
]

如何让Node.js返回JSON，如下所示：

{
    "header": [
        "id",
        "tstamp",
        "dmemberprofiles",
        "dgroupprofiles",
        "msclprofiles"
    ],
    "data": [
        {
            "id" : "1",
            "tstamp" : "2017-06-01T00:00:00.000Z",
            "dmemberprofiles","48400"
            "dgroupprofiles","4800"
            "msclprofiles","400"
        },
        {
            "id" : "2",
            "tstamp" : "2017-06-02T00:00:00.000Z",
            "dmemberprofiles","48700"
            "dgroupprofiles","4900"
            "msclprofiles","410
        }           
    ]
}

我已经四处寻找其他示例，但尚未找到Node.js特定的解决方案。

Answer 1

您可以使用Object.keys从数组的第一个对象获取键。

var array = [{ id: "1", tstamp: "2017-06-01T00:00:00.000Z", dmemberprofiles: 48400, dgroupprofiles: 4800, msclprofiles: 400 }, { id: "2", tstamp: "2017-06-02T00:00:00.000Z", dmemberprofiles: 48700, dgroupprofiles: 4900, msclprofiles: 410 }],
    object = { header: Object.keys(array[0]), data: array };

console.log(object);

.as-console-wrapper { max-height: 100% !important; top: 0; }

Answer 2

假设

var data = [
    {
        "id" : "1",
        "tstamp": "2017-06-01T00:00:00.000Z",
        "dmemberprofiles","48400"
        "dgroupprofiles","4800"
        "msclprofiles","400"
    },
    {
        "id" : "2",
        "tstamp" : "2017-06-02T00:00:00.000Z",
        "dmemberprofiles","48700"
        "dgroupprofiles","4900"
        "msclprofiles","410
    }
]

然后就这样做：

// Add data to wrapper
var wrapper = {
    "header": [
        "id",
        "tstamp",
        "dmemberprofiles",
        "dgroupprofiles",
        "msclprofiles"
    ],
    "data": data
}

// Convert to JSON
var json = JSON.stringify( wrapper );

返回带有嵌套数组的JSON，用于NodeJS express中的数据和标题

2 个答案: