Mongoose 等待 node.js req.query 数据

Question

I am working on small backend project. I send GET requests via postman to express.js app. Express send request to mongoose and return data.

I am trying to make it shorter by writing req.query.data instead of object name. req.query.data is object name which is imported to node file but mongoose "find" function read it as "req.query.data" instead of acuall data.

I tried putting req data in () but it still didn't want to read value. I have no idea how to make it working

Code:

 const Daily = require("./DailyStats/DailySchema") module.exports.GetData = async (req, res) => { await Daily.find({"Date.month": 3}, function (err, data) { if(err){ console.error(err) } res.send(data) }) }

What I want is

    await (req.query.data).find({"Date.month": 3}, function (err, data) {
        if(err){
            console.error(err)
        }
        res.send(data)
    })

While using second code I got error "Cannot use method find on req.query.data"

Answer 1

find should be called on a mongoose.Model

You may use mongoose.model(req.query.data) assuming req.query.data is your model name

That said you should

• check that provided data is only a valid model name
• name data better, like modelName

const mongoose = require('mongoose')
mongoose.connect('mongodb://localhost:27017/dummy')
const NameModel = mongoose.model('Name', { name:String }, 'names')

;(async()=>{
  try {
  console.log(mongoose.model('Name') === NameModel) // true
  } finally {
    mongoose.disconnect()
  }
})()