Question

当数据库对所有信息都进行GET请求时，我遇到了问题。每次保存的信息量都会翻倍。

这是架构+连接：

const axios = require("axios");
const mongoose = require("mongoose");

mongoose.connect('mongodb://localhost:27017/FinalProjectDB', {
    useNewUrlParser: true,
        useUnifiedTopology: true,
})
  .then(async () => {
    console.log('connected to mongoDB-POSTS');
    await getPostsFromApiAndSaveToDb(
      'https://jsonplaceholder.typicode.com', 'posts',
      Post
    );
    console.log('mongoDB populated with Data');    
  }).catch((err) => {
    console.log(err)
  })
    
const Schema = mongoose.Schema;

const PostSchema = new Schema(
  {
    userId: "String",
    id: "String",
    title: "String",
    body:  "String",
  },
  {
    collection: "posts",
  }
);    
const Post = mongoose.model("Post", PostSchema);

以及我的GET请求：

const getPostsFromApiAndSaveToDb = (url, type, model) => {
  return new Promise(async (resolve) => {
    const response = await axios.default.get(`${url}/${type}`);
    const data = response.data;
    
      data.forEach(async (el) => { 
        let currentElement = new model(el);
        await currentElement.save()
    });   
    resolve();
   })
 }

我试图做一个IF语句，以防万一数组等于或为0时它将访问API，但我没有通过这种方式从API得到响应：

let postArray = [];
const postArrayLink = async (url) => {
  const response = await axios.default.get(url)
  postArray = response.data;
}

const getPostsFromApiAndSaveToDb = (url, type, model) => {
  return new Promise(async (resolve) => {
    const response = await axios.default.get(`${url}/${type}`);
    const data = response.data;
    if(postArray.length <= 0){
      data.forEach(async (el) => { 
        let currentElement = new model(el);
        await currentElement.save()
    });
    }   
    resolve();
   })
 }

花很多时间解决问题，欢迎任何帮助！

使用MONGODB从API获取重复数据

0 个答案: