Custom Error Messages with Mongoose

Question

So according to the mongoose docs, you are supposed to be able to set a custom error message in the schema like so:

 var breakfastSchema = new Schema({
  eggs: {         


        

Answer 1

Updated version for Mongoose 5.x.x

MySchema.post('save', function (error, doc, next) {
    if (err.name === 'BulkWriteError' && error.code === 11000) 
        next(new Error('This item already exists, please try again'));
    else next(error);
});