is there a mongoose connect error callback

Question

how can i set a callback for the error handling if mongoose isn\'t able to connect to my DB?

i know of

connection.on(\'open\', function () { ... });
         


        

Answer 1

there many mongoose callback you can use,

// CONNECTION EVENTS
// When successfully connected
mongoose.connection.on('connected', function () {  
  console.log('Mongoose default connection open to ' + dbURI);
}); 

// If the connection throws an error
mongoose.connection.on('error',function (err) {  
  console.log('Mongoose default connection error: ' + err);
}); 

// When the connection is disconnected
mongoose.connection.on('disconnected', function () {  
  console.log('Mongoose default connection disconnected'); 
});

// If the Node process ends, close the Mongoose connection 
process.on('SIGINT', function() {  
  mongoose.connection.close(function () { 
    console.log('Mongoose default connection disconnected through app termination'); 
    process.exit(0); 
  }); 
}); 

more on: http://theholmesoffice.com/mongoose-connection-best-practice/