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

Just apply a middleware.

recordingSchema.post('save', function (error, _, next) {
    next( error.code === 11000 
      ?   new Error('This item field already exist')
      :   error)
});