将两个数组中的数据写入一个文档

Question

我有一些数据要合并到 mongoDB 的一个文档中。 我有两个数组

const users = ['Anna', 'Jack', 'Paul', 'Elena']
const additionalData = ['data1', 'data2', 'data3', 'data4', 'data5']

for(const i of users){
    const user = {
      username: i.username
  };
  for(const key of additionalData){
    user.keyword = key
  }
  await User.create(model)
}

[
 {
  username: 'Anna',
  keyword: 'data1'
 },
 {
  username: 'Jack',
  keyword: 'data2'
 },
 {
  username: 'Paul',
  keyword: 'data3'
 },
 {
  username: 'Elena',
  keyword: 'data4'
 }
]

我需要将这些数组合并到一个文档中

Answer 1

试试这个，你只需要遍历users 并使用当前索引从additionalData 获取数据。您可以通过两种方式实现这一目标

原生方式

const users = ['Anna', 'Jack', 'Paul', 'Elena'];
const additionalData = ['data1', 'data2', 'data3', 'data4', 'data5'];

const newArray = [];
for (let i = 0; i < users.length; i += 1) {
const user = users[i];
const obj = { userName: user, keyword: additionalData[i] || null };
newArray.push(obj);
}
console.log(newArray);

ES6 方式

const users = ['Anna', 'Jack', 'Paul', 'Elena'];
const additionalData = ['data1', 'data2', 'data3', 'data4', 'data5'];

const result = users.map((r, i) => {
const obj = { userName: r, keyword: additionalData[i] || null };
return obj;
});

console.log(result)

Answer 2

// Users and additionalData array
const users = ['Anna', 'Jack', 'Paul', 'Elena'];
const additionalData = ['data1', 'data2', 'data3', 'data4', 'data5'];

// Merge them with this
$.merge( $.merge( [], users ), additionalData );