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 () { ... });

but is there something like

connection.on('error', function (err) { ... });

?

1
65
7/13/2011 9:00:48 AM

Accepted Answer

When you connect you can pick up the error in the callback:

mongoose.connect('mongodb://localhost/dbname', function(err) {
    if (err) throw err;
});
112
7/13/2011 2:41:14 PM

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/


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