Problem
InfindAddUsers.js
When you find () in, you can read the data normally, but there is no data when you return.
Code
findAddUsers.js
const mongoose = require('mongoose')
let Schema = mongoose.Schema
let UserSchema = new Schema({
name: String,
age: Number
})
let temp = mongoose.model('temp', UserSchema)
exports.findAllUsers = async () => {
let query = temp.find()
let res = [1,2,3]
await query.exec(function (err, users) {
if (! err) {
res = users
// console.log(res) // data can be printed here
}
})
// console.log(res) // res here is empty and has no value
return res
}
app.js
const Koa = require('koa')
const app = new Koa()
const router = require('./router/router.js')
const mongoose = require('mongoose')
mongoose.connect('mongodb://localhost/db1')
app
.use(router.home.routes())
.use(router.home.allowedMethods())
app.listen(3000, () => {
console.log('running')
})
router.js
const Router = require('koa-router')
const router = new Router()
const controller = require('../controller/user.js')
module.exports = {
home: router.get('/', controller.getAllUsers)
}
user.js
const userHelper = require('../dbhelp/findAllUsers.js')
module.exports = {
getAllUsers: async (ctx, next) => {
ctx.body = await userHelper.findAllUsers()
}
}
await query.exec(function (err, users) { if (! err) { res = users // console.log(res) // data can be printed here } })
You need to write synchronous grammar instead of asynchronous grammar here.