Agile web development with rails
- by Steve
Hi.. This code is from the agile web development with rails book.. I don't understand this part of the code...
User is a model which has name,hashed_password,salt as its fields. But in the code they are mentioning about password and password confirmation, while there are no such fields in the model. Model has only hashed_password. I am sure mistake is with me. Please clear this for me :)
User Model has name,hashed_password,salt. All the fields are strings
require 'digest/sha1'
class User < ActiveRecord::Base
validates_presence_of :name
validates_uniqueness_of :name
attr_accessor :password_confirmation
validates_confirmation_of :password
validate :password_non_blank
def self.authenticate(name, password)
user = self.find_by_name(name)
if user
expected_password = encrypted_password(password, user.salt)
if user.hashed_password != expected_password
user = nil
end
end
user
end
def password
@password
end
def password=(pwd)
@password = pwd
return if pwd.blank?
create_new_salt
self.hashed_password = User.encrypted_password(self.password, self.salt)
end
private
def password_non_blank
errors.add(:password,"Missing password")if hashed_password.blank?
end
def create_new_salt
self.salt = self.object_id.to_s + rand.to_s
end
def self.encrypted_password(password, salt)
string_to_hash = password + "wibble" + salt
Digest::SHA1.hexdigest(string_to_hash)
end
end
