Example 1: mongoose
import express from 'express';
or
const exporess = require('express');
import mongoose from 'mongoose';
or
const mongoose = require('mongoose');
const app = express();
mongoose.connect('mongodb://localhost:27017/mongo-tree' , {
useNewUrlParser: true,
useUnifiedTopology: true
});
const db = mongoose.connection;
db.on('error', console.error.bind(console, 'connection error:'));
db.once('open', function() {
console.log('connected db')
});
app.use('/', (req, res) => {
res.send('hello');
}
);
const port = process.env.PORT || 5000
app.listen(port, () => {
console.log('running');
})
//for es6 >npm i @babel/core @babel/node @babel/preset-env --save-dev
//create .babelrc file and put this
{
"presets": [
"@babel/preset-env"
]
}
//and package.json
"scripts": {
"test": "echo \"Error: no test specified\" && exit 1",
"start": "nodemon --exec babel-node server"
},
Example 2: mangoosejs
const mongoose = require('mongoose');
mongoose.connect('mongodb://localhost:27017/test', {useNewUrlParser: true, useUnifiedTopology: true});
const Cat = mongoose.model('Cat', { name: String });
const kitty = new Cat({ name: 'Zildjian' });
kitty.save().then(() => console.log('meow'));
Example 3: mongoose npm
const mongoose = require('mongoose');
mongoose.connect('mongodb://localhost/my_database', {
useNewUrlParser: true,
useUnifiedTopology: true,
useFindAndModify: false,
useCreateIndex: true
})
.then(()=> console.log('connect'))
.catch((error) => console.error(error));
Example 4: mongoose
const mongoose = require('mongoose');
mongoose.connect('mongodb://localhost:27017/twitter', {
useNewUrlParser: true,
useUnifiedTopology: true
});
const db = mongoose.connection;
db.on('error', console.error.bind(console, 'connection error:'));
db.once('open', function () {
console.log("Database Connected !!!");
});
module.exports = db;
Example 5: mongoose
Extra clever
Earthbound spirit
Ghost in the form
Of a mongoose
And I have hands
And I have feet
I'll never die
I am a freak
Hello, I'm here
I'm living in the wall
I know I might be small, but
I, I, I, am a
Freak
Thou wilt never
Know what I am
I am the fifth dimension
And I'll split the atom
And if you see me
You're paralyzed
Pillar of salt
You're mummified
Hello, I'm here
I'm living in the wall
I know, I might be small
But I am the Eighth Wonder
And I was born
1852
And I was born
In India
And I shall haunt
Like the Buggane
With such weird noise
And clanking chains
Hello, I'm here
I'm living in the wall
I know I might be small, but
I, I, I, am a
Freak
I say "vanished"
To underground
Jim, let me go
I watch like Hell
And I have hands
And I have feet
I'll never die
I am a freak
Hello, I'm here
I'm living in the wall
I know I might be small
But I am the eighth wonder
Eighth wonder of the world
You'll never get to see
What in the name of God can I be?
Example 6: mongoose
mongoose initial setup