javascript - 如何访问http响应中的嵌套数组和对象

Question

我有一个包含对象和数组的嵌套数据结构。如何提取信息，即访问特定或多个值(或键)？

{
  "data": [
    {
      "id": 2,
      "addEmployee": {
        "firstName": "Devansh"
      },
      "attendances": [
        {
          "id": 3,
          "checkIn": "2020-02-18T04:36:45.000Z",
          "checkOut": "2020-02-18T11:46:16.000Z",
          "totalHours": "7:9",
          "date": "2020-02-18",
          "status": "present",
          "createdAt": "2020-02-18T04:36:45.000Z",
          "updatedAt": "2020-02-18T11:46:16.000Z",
          "userId": 2
        }
      ]
    }
  ]
}

我如何访问名字和出勤数组值

Answer 1

您必须将对象分配给变量，就像我在这里分配给 val 变量一样。您可以按如下方式访问属性。您可以在此处运行代码片段并查看输出

let val =  {
  "data": [
    {
      "id": 2,
      "addEmployee": {
        "firstName": "Devansh"
      },
      "attendances": [
        {
          "id": 3,
          "checkIn": "2020-02-18T04:36:45.000Z",
          "checkOut": "2020-02-18T11:46:16.000Z",
          "totalHours": "7:9",
          "date": "2020-02-18",
          "status": "present",
          "createdAt": "2020-02-18T04:36:45.000Z",
          "updatedAt": "2020-02-18T11:46:16.000Z",
          "userId": 2
        }
      ]
    }
  ]
}

val.data.forEach(eachData => { 
  console.log('Employee Name ---> ',eachData.addEmployee.firstName);
  eachData.attendances.forEach(atten => {
    console.log('attendance Object -->',atten);
  })
});