Logic of beforeValidate() in sails.js -

i new sails.js, , after works find beforevalidate() hard use.

i have model user 2 attributes nickname , age. both attributes marked required sails check validation. when creating user, if client not specify nickname, assign random nickname it, following:

beforevalidate: function(user, next){     if (!user.nickname) user.nickname = randomstring(5);     next(); } 

this assigning should applied before sails validates required tag of nickname, beforevalidate() seems reasonable place it. however, when want update user's age like:

user.update(user.id, {age: 40}); 

it trigger beforevalidate() and, sadly, new nickname assigned , replace origin one, since parameter user in beforevalidate() {age: 40}.

what expect parameter user in beforevalidate(user, callback) should updated user, combination of both changed , unchanged attributes (e.g. user old id, old nickname , new age), instead of changed attributes specify in user.update() (e.g. {age: 40}).

do misunderstand something?

while calling create() values required add new record passed beforevalidate. whereas while calling update() values getting updated passed beforevalidate. reason getting user.nickname empty value.

refer docs @ http://sailsjs.org/documentation/concepts/models-and-orm/lifecycle-callbacks.

callbacks on create

beforevalidate: fn(values, cb)

callbacks on update

beforevalidate: fn(valuestoupdate, cb)