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mongoose in node.js

// getting-started.js
const mongoose = require('mongoose');

main().catch(err => console.log(err));

async function main() {
  await mongoose.connect('mongodb://localhost:27017/test');
}
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mongoose node js

// getting-started.js
var mongoose = require('mongoose');
mongoose.connect('mongodb://localhost/test', {useNewUrlParser: true});
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Mongoose node js

// getting-started.js
var mongoose = require('mongoose');
mongoose.connect('mongodb://localhost/test', {useNewUrlParser: true});
var db = mongoose.connection;
db.on('error', console.error.bind(console, 'connection error:'));
db.once('open', function() {
  // we're connected!
});
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mongoose in nodem js

const kittySchema = new mongoose.Schema({
  name: String
});
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node js + mongoose

const db = mongoose.connection;
db.on('error', console.error.bind(console, 'connection error:'));
db.once('open', function() {
  // we're connected!
});
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mogoosejs

const mongoose = require('mongoose');
mongoose.connect('mongodb://localhost:27017/test', {userNewurlParser:true});

const Cat = mongoose.model('Cat', { name: String });

const kitty = new Cat({ name: 'Zildjian' });
kitty.save().then(() => console.log('meow'));
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mongoose node js

var db = mongoose.connection;
db.on('error', console.error.bind(console, 'connection error:'));
db.once('open', function() {
  // we're connected!
});
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using mongoose with node js

// Create an instance of model SomeModel
var awesome_instance = new SomeModel({ name: 'awesome' });

// Save the new model instance, passing a callback
awesome_instance.save(function (err) {
  if (err) return handleError(err);
  // saved!
});
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node js + mongoose

await mongoose.connect('mongodb://localhost/my_database', {  useNewUrlParser: true,  useUnifiedTopology: true});
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mongoose in nodem js

const Kitten = mongoose.model('Kitten', kittySchema);
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mongoose in nodem js

const silence = new Kitten({ name: 'Silence' });
console.log(silence.name); // 'Silence'
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mongoose in nodem js

// NOTE: methods must be added to the schema before compiling it with mongoose.model()
kittySchema.methods.speak = function speak() {
  const greeting = this.name
    ? "Meow name is " + this.name
    : "I don't have a name";
  console.log(greeting);
};

const Kitten = mongoose.model('Kitten', kittySchema);
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mongoose in nodem js

const fluffy = new Kitten({ name: 'fluffy' });
fluffy.speak(); // "Meow name is fluffy"
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mongoose in nodem js

await fluffy.save();
fluffy.speak();
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mongoose in nodem js

const kittens = await Kitten.find();
console.log(kittens);
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mongoose in nodem js

await Kitten.find({ name: /^fluff/ });
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