Using custom validation messages in Sails.js by Rifat (itsrifat) - https://github.com/itsrifat Reference: https://github.com/balderdashy/sails/issues/1173#issuecomment-31327958

gistfile1.txt

// make a module in node_modules named 'my-validation-utils'. create a index.js file there. and put the following content there:

var user = {
  email:{
    required:'Email Required',
    email:'Should be an email'
  },
  name:{
    required:'name required'
  }

};

var product={
    name:{
         required:'Product name is required'
    }
}

var validationMessages = {
  user:user,
  product:product
};

/**
 * This function expects the name of the model and error.validationError
 * and puts the user defined messages in error.validationError 
 */
module.exports = function(model,validationError){
  var messages = validationMessages[model];
  for(key in messages){
    var element = messages[key];
   if(validationError[key]){
     for(i in validationError[key]){
       var err = validationError[key][i];
       err.message = element[err.rule];
     }
   }
  }
  return validationError;
};

// Now in your controller do the following:

User.create(user).done(function (error, user) {
  if (error) {
    if (error.ValidationError) {
      var validator = require('my-validation-utils');
      var errors = validator('user',error.ValidationError);// puts the messages for model user
     //now errors contains the validationErrors with user defined messages
    }

  } else {
   //user is saved
  }
});