how to define error message in sails.js - node.js

Question

It's my first time using sails and it looks like it's good but I run into a problem, is it possible to define a custom error message in sails model validation because it looks like the error message being returned is to technical and not user friendly.
Thanks
Update: https://gist.github.com/mikermcneil/8366092

Answer 1

Here's another alternative:
/**
* Takes a Sails Model object (e.g. User) and a ValidationError object and translates it into a friendly
* object for sending via JSON to client-side frameworks.
*
* To use add a new object on your model describing what validation errors should be translated:
*
* module.exports = {
* attributes: {
* name: {
* type: 'string',
* required: true
* }
* },
*
* validation_messages: {
* name: {
* required: 'you have to specify a name or else'
* }
* }
* };
*
* Then in your controller you could write something like this:
*
* var validator = require('sails-validator-tool');
*
* Mymodel.create(options).done(function(error, mymodel) {
* if(error) {
* if(error.ValidationError) {
* error_object = validator(Mymodel, error.Validation);
* res.send({result: false, errors: error_object});
* }
* }
* });
*
* #param model {Object} An instance of a Sails.JS model object.
* #param validationErrors {Object} A standard Sails.JS validation object.
*
* #returns {Object} An object with friendly validation error conversions.
*/
module.exports = function(model, validationError) {
var validation_response = {};
var messages = model.validation_messages;
validation_fields = Object.keys(messages);
validation_fields.forEach(function(validation_field) {
if(validationError[validation_field]) {
var processField = validationError[validation_field];
//console.log(processField);
processField.forEach(function(rule) {
if(messages[validation_field][rule.rule]) {
if(!(validation_response[validation_field] instanceof Array)) {
validation_response[validation_field] = new Array();
}
var newMessage={};
newMessage[rule.rule] = messages[validation_field][rule.rule];
validation_response[validation_field].push(newMessage);
}
});
}
});
return validation_response;
};
Credits to: sfb_

Answer 2

Here is an ugly fix:
make a folder 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 something like this:
User.create(user).done(function (error, user) {
if (error) {
if (error.ValidationError) {
var validator = require('path/to/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
}
});