How can I make my Mongo Instance working?

Question

Mongoose: 4.4.5 MongoDB: 3.0.8

 

Express Route

var mongoose = require('mongoose');

mongoose.connect("mongodb://127.0.0.1:27017/db");

var db = mongoose.connection;

db.on('error', console.error.bind(console, 'connection error:'));

db.once('open', function(callback) {

    console.log("connection to db open")

});

var User = require("../models/user.js");

User Model

var user = new Schema({

    uid: { type: Number, required: true, unique: true},

    hwid: { type: String, default:""},

    bol:{type:String,default:""}

});

Update Enpoint

Working version: Model.update()

 

User.update({_id: id}, {

    uid: 5, 

}, function(err, numberAffected, rawResponse) {

    console.log(err);

})

Not working version and I have to solve this: Object.save()

 

User.find({_id:id}, function(err,user){

    if(err){

         console.log(err);

    }

    if(!user){

         console.log("No user");

    }else{

        user.uid = 5;

        user.save(function(err,news){

            console.log("Tried to save...");

        });

    }

    console.log("At least worked");

})

I cannot even see callback firing. Callback is not getting invoked.

Answer 1

I was also facing something like this. It was about changing an array inside DB, the moment I tried to use.save(), It did not get that I changed anything, then the .save() didn't work. I just use markModified() before use .save() and I was able to solve the problem.

Nonworking code:

club.members[index].name = new_name;

club.save();

Working code:

club.members[index].name = new_name;

club.markModified('members');

club.save();

Check out this MongoDB tutorial to find more insights into the concepts.