MongoDB

Cloud providers with free plans

  • mlab.com
  • MongoDB Atlas (https://www.youtube.com/watch?v=-Kmrj6_1rpY&t=0s)


MongoDB In The Cloud With Atlas

https://www.youtube.com/watch?v=KKyag6t98g8


Connect Example

const express = require('express');
const mongoose = require('mongoose');

const app = express();
app.set('port', process.env.PORT || 3000);

mongoose.connect(
  'mongodb://user1:[email protected]:45951/building_business_app_with_vue_and_mongo',
  { useNewUrlParser: true }
);
const db = mongoose.connection;

db.on('error', console.error.bind(console, 'connection error:'));
db.once('open', () => {
  console.log('Connected to MongoDB');

  app.listen(app.get('port'), () => {
    console.log('API Server Listening on port ' + app.get('port'));
  });
});


Examples:

https://bitbucket.org/marley-nodejs/Build-a-Real-Time-web-app-in-node.js-Angular.js-mongoDB


Installation and Start in debian linux

# apt-get install -y mongodb

# mkdir -p /data/db/
# mongod


Some Examples

# mongo
> use knowledgebase
> db.createCollection('articles');
> db.createCollection('categories');

Insert Data:

> db.categories.insert({name:"Technology"});
> db.categories.insert({name:"Education"});
> db.categories.insert({name:"Healthcare"});
> db.categories.find();



> db.articles.insert({title:"Article One", category: "Technology", body: "This is the body", date: new Date()});
> db.articles.insert({title:"Article Two", category: "Education", body: "This is the body", date: new Date()});
> db.articles.insert({title:"Article Three", category: "Education", body: "This is the body", date: new Date()});

> db.articles.find();


Update Data:

> use knowledgebase
> db.categories.update({name:"Technology"}, {$set:{description:"Lorem ipsum dolor sit amet, consectetur adipiscing elit. Fusce iaculis eu sem pellentesque rutrum. Nulla nec porttitor velit, in venenatis ante. Donec eget fringilla dolor."}});


find().pretty():

> db.categories.find().pretty();
{
"_id" : ObjectId("57e67705c08c6bee3d047802"),
"description" : "Lorem ipsum dolor sit amet, consectetur adipiscing elit. Fusce iaculis eu sem pellentesque rutrum. Nulla nec porttitor velit, in venenatis ante. Donec eget fringilla dolor.",
"name" : "Technology"
}