How do i fix this error i am not using MongoDb Atalas i want to use it in my local machine

const express = require('express');
const app = express()
const mongoose = require('mongoose');
const url = 'mongodb://localhost:27017/testDb'

mongoose.connect(url, {useNewUrlParser: true, useUnifiedTopology: true})
  .then(() => console.log('DB Connected'))
  mongoose.connection.on('error', err => {
    console.log(`DB connection error: ${err.message}`)
  });

const NewSchema = new mongoose.Schema({
    name:String,
    age:Number
})
const newModel = new mongoose.model("collection",NewSchema)

const data = newModel({
    name:"prajwal",
    age:30
})
data.save()

app.listen(3000,()=>{
    console.log("listening to the port 3000")
})

This is the error that i got from the code

CodePudding user response：

The save() call should be awaited. Also, looks like you are not connected to the DB, try with:

const express = require('express');
const app = express();
const mongoose = require('mongoose');
const url = 'mongodb://localhost:27017/testDb';

const NewSchema = new mongoose.Schema({
  name: String,
  age: Number,
});
const newModel = new mongoose.model('collection', NewSchema);

(async () => {
  try {
    await mongoose.connect(url, {
      useNewUrlParser: true,
      useUnifiedTopology: true,
    });
    console.log('DB Connected');

    const data = newModel({
      name: 'prajwal',
      age: 30,
    });
    await data.save();
  } catch (err) {
    console.log(`DB connection error: ${err.message}`);
  }
})();

app.listen(3000, () => {
  console.log('listening to the port 3000');
});