How to create a Mongo database to Node.js? - node.js

Question

I have created the backend operations using Node.js / MongoDB and created services for them, but when I run the server it indicates that I've connected successfully, but I can't see a database in Robo 3T.
Here is what I coded:
DBConfig.js
var mongoose = require ('mongoose');
var Schema = mongoose.Schema;
var UserSchema = new Schema({
name : {
type : String,
require : true
},
address : {
type : String,
require : true
}
});
mongoose.model("User", UserSchema);
module.exports = mongoose;
mongoose.connect('mongodb://127.0.0.1:27017/TestDB4', function(err){
if(err)
{
console.log(err);
process.exit(-1);
}
console.log("Connected to the db")
});
I can't see an error. Why isn't the DB created?

Answer 1

check your User.Controller.js as this below,
var mongoose = require('../DBSchema/SchemaMapper');
var UserSchema = mongoose.model('User');
var UserController = function(){
this.insert = (data) => {
return new Promise((resolve, reject) => {
var user = new UserSchema({
userName: data.userName,
password: data.password
});
user.save().then(() => {
resolve({status: 200, message: "Added new user"});
}).catch(err => {
reject({status: 500, message: "Error:- "+err});
})
})
}
this.update = (id, data) => {
return new Promise((resolve, reject) => {
UserSchema.update({_id: id}, data).then(() => {
resolve({status: 200, message: "update user"});
}).catch(err => {
reject({status: 500, message: "Error:- " + err});
})
})
}
this.searchAll = () => {
return new Promise((resolve, reject) => {
UserSchema.find().exec().then((data) => {
resolve({status: 200, data: data});
}).catch(err => {
reject({status: 500, message: "Error:- " + err});
})
})
}
this.search = (id) => {
return new Promise((resolve, reject) => {
UserSchema.find({_id:id}).exec().then(user => {
resolve({status: 200, data: user});
}).catch(err => {
reject({status: 500, message: "Error:- " + err});
})
})
}
this.delete = (id) => {
return new Promise((resolve, reject) => {
UserSchema.remove({_id:id}).then(() => {
resolve({status: 200, message: "remove user"});
}).catch(err => {
reject({status: 500, message:"Error:- " + err});
})
})
}
}
module.exports = new UserController();
And User.Route.js as below,
var express = require('express');
var router = express.Router();
var Controller = require('./User.Controller');
router.post('/', (req, res) => {
Controller.insert(req.body).then(data => {
res.status(data.status).send({message: data.message});
}).catch(err => {
res.status(err.status).send({message: err.message});
})
});
router.put('/:id', (req, res) => {
Controller.update(req.params.id, req.body).then(data => {
res.status(data.status).send({message: data.message});
}).catch(err => {
res.status(err.status).send({message: err.message});
})
});
router.get('/', (req, res) => {
Controller.searchAll().then(data => {
res.status(data.status).send({data: data.data});
}).catch(err => {
res.status(err.status).send({message: err.message});
});
});
router.get('/:id', (req, res) => {
Controller.search(req.params.id).then(data => {
res.status(data.status).send({data: data.data});
}).catch(err => {
res.status(err.status).send({message: err.message});
});
});
router.delete('/:id', (req, res) => {
Controller.delete(req.params.id).then(data => {
res.status(data.status).send({message: data.message});
}).catch(err => {
res.status(err.status).send({message: err.message});
})
})
module.exports = router;

Answer 2

check your app.js as follows
const Express = require("express");
const BodyParser = require("body-parser");
const Routes = require("./Routes");
const Cors = require("cors");
const app = Express();
app.use(Cors());
app.use(BodyParser.urlencoded({ extended: false }));
app.use(BodyParser.json());
app.use('/', Routes);
app.listen(8083, 'localhost', (err) => {
if(err) {
console.log(err);
process.exit(-1);
}
console.log("Server listen port 8083");
});
and Routes.js as follows,
var Express = require("express");
var Routes = Express.Router();
var UserRoute = require('./src/User/User.Route');
var CommentRoute = require('./src/Comment/Comment.Route');
Routes.use('/user/', UserRoute);
Routes.use('/comment/', CommentRoute);
module.exports = Routes;