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How to use the connect function from mongoose

Find comprehensive JavaScript mongoose.connect code examples handpicked from public code repositorys.

mongoose.connect is a function that connects your Node.js application to a MongoDB database using Mongoose, an object modeling tool for MongoDB.

mongoose.md?plain=1

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```

3、 使用"mongoose"连接数据库

```
var db = mongoose.connect("mongodb://user:pass@ip:port/database");
```

说明

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+ 5 other calls in file

mongoose.js

GitHub: mstraughan86/Scry

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  return omni.delay(9000) // used to ensures if back to back disconnect and terminate, things save.
    .then(new Promise((resolve, reject) => mongoDB.close(resolve)))
    .then(() => {console.log('MongoDB: Closed.');})
};
const connect = () => {
  return mongoose.connect(url + dbname, {
    useMongoClient: true,
    // I don't know what to do about the connection timeout issue:
    // https://stackoverflow.com/questions/40585705/connection-timeout-for-mongodb-using-mongoose
    // http://mongoosejs.com/docs/connections.html#options

How does mongoose.connect work?

mongoose.connect is a function in the Mongoose library that connects your Node.js application to a MongoDB database using Mongoose, an object modeling tool for MongoDB. When you call mongoose.connect, you pass it a MongoDB connection string and optional options such as the database name, authentication information, and connection options. Once the connection is established, Mongoose creates a connection object that can be used to interact with the MongoDB database. You can use the connection object returned by mongoose.connect to define models, create documents, query data, and perform other operations on the MongoDB database using Mongoose's object modeling interface. If the connection to the MongoDB database fails, mongoose.connect throws an error. You can listen for connection events such as "connected", "error", and "disconnected" to handle connection-related events in your application. Overall, mongoose.connect provides a simple way to establish a connection to a MongoDB database using Mongoose and use Mongoose's object modeling interface to work with data in the database.

database.js

GitHub: DanWahlin/AngularCLI-NodeJS-MongoDB-CustomersService

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var options = {
    promiseLibrary: global.Promise,
    useNewUrlParser: true,
    useUnifiedTopology: true
};
mongoose.connect(connectionString, options, (err) => {
    if (err) {
        console.log('mongoose.connect() failed: ' + err);
    }
});

bootstrap.js

GitHub: MichaelStephan/uptime

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var config     = require('config');
var semver     = require('semver');

// configure mongodb
var connectWithRetry = function() {
  mongoose.connect(config.mongodb.connectionString || 'mongodb://' + config.mongodb.user + ':' + config.mongodb.password + '@' + config.mongodb.server +'/' + config.mongodb.database, { server: { auto_reconnect : true, poolSize: 100  } }, function(err) {
    if (err) {
      console.error('Failed to connect to mongo on startup - retrying in 5 sec', err);
      setTimeout(connectWithRetry, 5000);
    } else {

747

Ai Example

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const mongoose = require("mongoose");

// Replace , , and with your own values
const connectionString =
  "mongodb+srv:// : @.mongodb.net/test?retryWrites=true&w=majority";

mongoose
  .connect(connectionString, {
    useNewUrlParser: true,
    useUnifiedTopology: true,
  })
  .then(() => {
    console.log("Connection to MongoDB established successfully");
  })
  .catch((err) => {
    console.error("Error connecting to MongoDB:", err);
  });

In this example, we first import the mongoose library into our Node.js application. We then define a connectionString variable with the connection string to our MongoDB database. You should replace the placeholders in the connection string with your own database user, password, and name. Next, we call mongoose.connect(connectionString, { useNewUrlParser: true, useUnifiedTopology: true }) to establish a connection to the MongoDB database. The options object passed as the second argument specifies that we want to use the new URL parser and the new server discovery and monitoring engine. If the connection is established successfully, the callback function passed to the then() method is executed and the message "Connection to MongoDB established successfully" is logged to the console. If the connection fails, the callback function passed to the catch() method is executed and the error message is logged to the console. Overall, this example demonstrates how to use mongoose.connect() to establish a connection to a MongoDB database using Mongoose in a Node.js application.

mongoose.md?plain=1

GitHub: tonyjiafan/nodejs-fullstack

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模型(Model)是由Schema构造生成的模型，除了Schema定义的数据库骨架以外，还具有数据库操作的行为，类似于管理数据库属性、行为的类。

如何通过Schema来创建Model呢，如下示例：

```
var db = mongoose.connect("mongodb://127.0.0.1:27017/test");  
// 创建Model 
var TestModel = db.model("test1", TestSchema);

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connectDb.js

GitHub: danny-avila/chatgpt-clone

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    // useFindAndModify: true,
    // useCreateIndex: true
  };

  mongoose.set('strictQuery', true);
  cached.promise = mongoose.connect(MONGO_URI, opts).then((mongoose) => {
    return mongoose;
  });
}
cached.conn = await cached.promise;

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index.js

GitHub: dashersw/mogollar

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  totalNumberOfResults: null
},
mutations: {},
actions: {
  async connect({ state, dispatch }, connectionString) {
    await mongoose.connect(connectionString, { useNewUrlParser: true })
    state.connection = mongoose.connection
    await dispatch('getDatabases')
  },
  async getDatabases({ state }) {

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+ 3 other calls in file

20180119_mongoose_5_connections.md?plain=1

GitHub: vkarpov15/thecodebarbarian.com

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```

This also means `mongoose.connect()` now works nicely with [async/await](http://thecodebarbarian.com/80-20-guide-to-async-await-in-node.js):

```javascript
const ret = await mongoose.connect('mongodb://localhost:27017/test');
ret === mongoose; // true
```

As for `mongoose.createConnection()`, mongoose still supports using the return value of `mongoose.createConnection()` as either a promise or as a connection.

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index.js

GitHub: nicejade/docker-vue-node-nginx-mongodb-redis

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  return new Promise((resolve, reject) => {
    mongoose.connection
      .on('error', error => reject(error))
      .on('close', () => console.log('Database connection closed.'))
      .once('open', () => resolve(mongoose.connections[0]))
    mongoose.connect(uri)
  })
}

connectDatabase(config.main.database)

mongoose.js

GitHub: robert52/express-starter

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var config = require('./index');

module.exports.init = init;

function init(app) {
  mongoose.connect(config.mongodb.uri);

  // If the Node process ends, cleanup existing connections
  process.on('SIGINT', cleanup);
  process.on('SIGTERM', cleanup);

meadowlark.js

GitHub: EthanRBrown/web-development-with-node-and-express

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       socketOptions: { keepAlive: 1 } 
    }
};
switch(app.get('env')){
    case 'development':
        mongoose.connect(credentials.mongo.development.connectionString, options);
        break;
    case 'production':
        mongoose.connect(credentials.mongo.production.connectionString, options);
        break;

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importer.js

GitHub: mayeaux/nodetube

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//  * Connect to MongoDB.
//  */
// mongoose.Promise = global.Promise;
//
// mongoose.Promise = global.Promise;
// mongoose.connect(databasePath, {
//   keepAlive: true,
//   reconnectTries: Number.MAX_VALUE,
//   useMongoClient: true
// });

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update-associations.js

GitHub: JKHeadley/rest-hapi

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try {
  const mongoURI = process.argv[3]

  mongoose.Promise = Promise

  mongoose.connect(mongoURI, {
    useNewUrlParser: true,
    useUnifiedTopology: true
  })

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database.js

GitHub: invertase/nlp.js-app

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 * Connect to the database using mongoose.
 * @returns {Promise} Promise for connecting.
 */
connect() {
  return new Promise((resolve, reject) => {
    mongoose.connect(
      this.url,
      { useNewUrlParser: true }
    );
    const db = mongoose.connection;

clase83.md?plain=1

GitHub: Fictizia/Master-en-Programacion-FullStack-con-JavaScript-y-Node.js_ed3

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**conectar con la base de datos**

Con Promesas
```js
const connect = () => {
   return  mongoose.connect('mongodb://localhost:27017/test', { useNewUrlParser: true });
}

connect()
    .then(data => console.log("CONNECTED--->", data))

dbconfigs.js

GitHub: firebase007/Serverless-example

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    console.log('using existing database connection');
    return Promise.resolve();
  }

  console.log('using new database connection');
  const database = await mongoose.connect(process.env.MONGODB_URL, {useNewUrlParser: true});
  isConnected = database.connections[0].readyState;
  // return isConnected;
};

MessageHandler.js

GitHub: Eximinati/Ari-Ani

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const mongoose = require("mongoose");
///close currency economy
main().catch((err) => console.log(err));


async function main() {
  await mongoose.connect(Mongo_URL);
}
global.user = require("../models/user");

client.js

GitHub: GasComIT/Secktor-Md

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   async function main() {
if (!fs.existsSync(__dirname + '/auth_info_baileys/creds.json')) {
    
        }
try{
       await mongoose.connect(mongodb);
} catch {
	console.log('Could not connect with Mongodb.\nPlease visit https://secktorbot.tech/wiki')
}
   }

utils.js

GitHub: BenFaruna/foodie

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async function connectDatabase() {
    const mongoDB = process.env.dbpassword !== undefined ?
        `mongodb+srv://BenFaruna:${process.env.dbpassword}@foodie.jdriiu0.mongodb.net/?retryWrites=true&w=majority` :
        'mongodb://127.0.0.1/foodie_dev_db';
    await mongoose.connect(mongoDB);
}


function encryptPassword(password) {
    const hashPassword = bcrypt.hashSync(password, 10);

+ 4 other calls in file

home.e2e.js

GitHub: tonybolanyo/bootweb3-node-ejemplos-2017

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let agent;

before(async function() {//
  await mockgoose.prepareStorage();
  await mongoose.connect('mongodb://example.com/TestingDB', {
    useMongoClient: true
  });
  // limpiamos las definiciones de modelos y esquemas de mongoose
  mongoose.models = {};

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