Develop Reference

How to set remote connection to database via Mongojs

i need set remote connection to MongoDB, but i need make it via mongojs.
var docdbconn = mongojs('mongodb+srv://mylogin:mypassword#cluster0-m1s1a.mongodb.net/nameofdatabase?retryWrites=true');
and usually i get next error:
MongoError: failed to connect to server [cluster0-m1s1a.mongodb.net:27017] on first connect [MongoError: getaddrinfo ENOTFOUND cluster0-m1s1a.mongodb.net cluster0-m1s1a.mongodb.net:27017]

are you sure the port provided is the right one, if there is no port specified related to the doc it seems like the port 27017 is setted by default. Maybe you're remote database isn't on this port and you need in your connection string to manually specify it.

I found a solution, so i used another string connection for MongoDB 3.4+ and it helped me.
var docdbconn = mongojs("mongodb://nickname:password#cluster0-shard-00-00-m1s1a.mongodb.net:27017,cluster0-shard-00-01-m1s1a.mongodb.net:27017,cluster0-shard-00-02-m1s1a.mongodb.net:27017/databasename?ssl=true&replicaSet=Cluster0-shard-0&authSource=admin&retryWrites=true");

MongoDB Cloud9 Connection

So, I am wondering if there is a way to connect to the mongoDB I have setup in my Cloud9 from an html. I mean, I have already connected to the db from the terminal and everything is working like a charm but I need to do some stuff inside my script in an html document and when I try calling the function which contains this code it does nothing
var MongoClient = require('mongodb').MongoClient
, format = require('util').format;
MongoClient.connect('mongodb://127.0.0.1:27017/ingesoft', function (err, db) {
if (err) {
throw err;
} else {
console.log("successfully connected to the database");
}
db.close();
});
I have saved the same code into a "file.js" and ran it from console using node file.js and it outputs into the console log "successfully connected to the database", plus the terminal which is running mongo's connection shows me one more connection to the db. The thing is, when I try to run that code inside my script it doesn't work. Sorry for my ignorance I am new to mongo.
Any help would be much appreciated

To simplify your question, here's what's going on:
node file.js containing the code in your question is working
pasting the same code to your html file is not
So, getting to the bottom of the issue, let's ask first: what's the difference between running node file.js and putting the code in html?
The difference is that node ... is running on your Cloud9 workspace (let's call it the server machine).
Your MongoDB server is also running on that server machine
The mongodb npm package you installed is also present on the server machine
The url: mongodb://127.0.0.1:27017/ingesoft references 127.0.0.1 which is the localhost for your server
whereas with the code on your browser:
The code is being run on your customer's machine
That machine doesn't have your Mongodb server
Browser's usually don't support require
You can do requires if you bundle code and use something like webpack or browserify. Did you perhaps do that?
If you did indeed package everything, was the mongodb package that you're requiring packaged?
Can the mongodb package be run from the client side?
The url: mongodb://127.0.0.1:27017/ingesoft references 127.0.0.1 which is the localhost for your customer's machine
Basically, as you can see from the above, the two are very different.
If you want to talk to your db, a lot of people go the following route:
Make a server application that implements some form of REST API
That REST API talks to your DB
Your client code knows how to talk to the REST API and get the required data
That way, you only talk to your MongoDB using your server, and the client can talk to your server via the internet.
This is, of course, an oversimplification, but I hope this resolves your confusion.

Point mongoos.connect at localhost mongodb

I am studying the MEAN stack by using this tutorial. But the tutorial connects to a remote mongodb installation. I have MongoDB running in the CentOS7 localhost.
How do I alter the mongoose connect line in server.js from the tutorial link above to connect to a localhost database instead of a remote database?
Here is the current line from server.js that needs to be changed to point to the localhost mongodb:
mongoose.connect('mongodb://node:nodeuser#mongo.onmodulus.net:27017/uwO3mypu');
A specific mongodb database has not been created yet. Do I need to create that also?

I'm fairly new at Mongo to, but I know how to connect to a local db. Basically I had to do the following:
Download the latest version of mongodb from https://www.mongodb.com/download-center?jmp=nav#community (according to your settings)
Once installed, I've created a folder that will be containing my DB.
Use a command line instance to start mongo like this:
mongod --dbpath [YOUR_DB_PATH]
Created a DB use mydb
With that you should have already a mongodb db instance looking for connections on default port. So you can change that line for this:
mongoose.connect('mongodb://localhost:27017/mydb');
Again, this is really basic and it is creating a mongo DB connection with all default options. So this will keep you rolling, but you may need to dig a bit more for custom options.
Hope this helps

Nodejs - Connecting to mongodb database within a js file?

So i have been looking at how to use mongodb from this tutorial: http://doduck.com/node-js-mongodb-hello-world-example/
I have installed mongodb locally within my project folder that contains my html css and js, i run npm list mongodb within the project folder and i get the mongodb version. I haven't installed it globablly, but as far as i know that is ok right?
Anyways, i tried adding the example from the tutorial to test connect to a mongodb database. I just created a function and called it as soon as my page loads:
function connectMongo(){
alert("test1");
var MongoClient = require('mongodb').MongoClient;
alert("test2");
var myCollection;
var db = MongoClient.connect('mongodb://127.0.0.1:27017/test', function(err, db) {
if(err){
throw err;
alert("mongoerror");
}
alert("connected to the mongoDB !");
// myCollection = db.collection('test_collection');
});
}
The first test alert works, but the second test does not appear. However, the rest of the code on the page still runs, so i dont think there is a syntax error. I have no idea how exactly im meant to run this example, can anyone tell me why my function is exiting after the line
var MongoClient = require('mongodb').MongoClient;
I also have mongoose installed, even though im not quite sure if im even using it in my example here
Sorry if my question is kind of vague, i have honestly no idea what im doing here

First although Nodejs is written in Javascript, you must clearly distinguish between client and server functions. Javascript's alert() is useful to pop messages on your browser. This is isn't something Nodejs does as it is a server app.
Forget about alert("message"); You want to use console.log("message"); to view log info on the server console.
Prerequisite
Let's quickly review Client-Server web interactions:
Server is up and running
Client Requests page via browser
Page shows up on the client's browser
Step 1
The missing step for you is (1), because the server is not up and running.
This is done by typing the following on your terminal:
$ node name_of_file_here.js
If there are errors in your syntax, or missing dependencies the console will log the errors. If none appear all should be well.
Step 2
Now at this point, you still can't expect to see anything "relevant" on the browser, because your server although it has setup a MongoDB instance, is still not listening to requests from clients.
Some code needs to be added:
'use strict';
var http = require('http');
var PORT=8009;
var MongoClient = require('mongodb').MongoClient;
// Connect to the db
var d = MongoClient.connect("mongodb://localhost:27017/exampleDb", function(err, db) {
if(!err) {
console.log("We are connected");
}
});
//Create a server
var server = http.createServer(function(request, response) {
console.log("received request");
// use MongoClient to get relevant data
// var relevant_data = ...;
// response.write(relevant_data);
response.write("hey there");
response.end();
});
server.listen(PORT, function(){
//Callback triggered when server is successfully listening. Hurray!
console.log("Server listening on: http://localhost:%s", PORT);
});
Final Note
I am in no way a MongoDB guru, but I believe a mongodb service (server) has to be running on your system for the MongoDB client to be able to create a connection.

It sounds like you are trying to run the mongo connection javascript in the browser. The mongodb connection runs on the server via the node executable. So this is javascript code in the web app running server side, rather than javascript delivered by the web app to a browser to run client side.
Create a file test.js
function connectMongo(){
var MongoClient = require('mongodb').MongoClient;
console.log('MongoClient is',typeof MongoClient)
var myCollection;
var url = 'mongodb://127.0.0.1:27017/test';
var db = MongoClient.connect(url, function(err, db) {
if(err){
console.log("mongoerror", err);
throw err;
}
console.log("connected to the mongoDB!");
myCollection = db.collection('test_collection');
});
}
connectMongo()
Then on your system, at a command or shell prompt, run
node test.js
It should print
$ node test.js
MongoClient is function
connected to the mongoDB!
^C
Once your server is connected to the database you can pass messages from your front end javascript to the backend server code. Normally this is done via an Ajax http request, so your javascript makes additional HTTP requests in the background. The JQuery client side library provides a simple cross browser API for this. You could also use Websockets to pass message back and forth from the server via SocketIO
For the basics of a Node/Express/MongoDB app try this: http://cwbuecheler.com/web/tutorials/2013/node-express-mongo/

Can Nodejs retrieve data from Meteor mini mongo?

I'm trying to use Nodejs to get data from Meteorjs mini mongo database. Here is my code:
var MongoClient = require('mongodb').MongoClient;
MongoClient.connect('mongodb://127.0.0.1:3001/meteor', function(err, db) {
if(err) throw err;
console.log("Connected to Database");
var test = db.collection("apps");
test.insert({"_id":"selfDefinedID"}, function(err,docs){
console.log("docs inserted");
console.log(docs);
});
test.find({"_id":"selfDefinedID"}).toArray(function(err,docs){
console.log("docs founded");
console.log(docs);
});
});
Insert data works fine. But, I can't retrieve data from meteor mini mongo database. And I got an error:
{ [MongoError: Connection Closed By Application] name: 'MongoError' }
Is it possible to retrieve Meteor mini mongo data using Nodejs? If possible, how?

The database meteor uses is a normal mongo database. You can connect to it like any other mongo db. If you are still in development mode, then the database runs at mongodb://localhost:3001/meteor, otherwise, in a bundled app, it's just the db you specified yourself using MONGO_URL.

On a windows machine, I created a new, blank, meteor project, and started it up. I then created a test script, npm installed the mongodb library, and ran your script and it worked fine. First run I get "docs inserted" and "docs founded", on subsequent runs obviously the insert is failing, but the find still works.
So two questions, first is this the same script your getting the error with? And two, if you create a blank meteor project and try it do you get the same error?