[Rails] Adding role's field to users

Hi,

(Using Rails 4.0.1, Ruby 1.9.3, latest devise and cancan gems. sqlite db for local development)

I am a rookie, setting up website and was adding roles(using cancan gem) to my users table. Everything works great, except when I select a role for a user it is not getting saved. The user gets saved/created OK but it never updates/ remembers any roles assigned to the user.

I was following the advice given here(Many roles per user). Any help or advice is most appreciated...

https://github.com/ryanb/cancan/wiki/role-based-authorization

Here is my users form...

<%= form_for(@user) do |f| %>

<div class="field">

    <%= f.label :email %><br />

    <%= f.text_field :email %>

  </div>

  <% if @current_method == "new" %>

    <div class="field">

      <%= f.label :password %><br />

      <%= f.password_field :password %>

    </div>

    <div class="field">

      <%= f.label :password_confirmation %><br />

      <%= f.password_field :password_confirmation %>

    </div>

  <% end %>

  <% for role in User::ROLES %>

    <%= check_box_tag "user[roles][#{role}]", role, @user.roles.include?(role), {:name => "user[roles][]"}%>

    <%= label_tag "user_roles_#{role}", role.humanize %><br />

  <% end %>

  <%= hidden_field_tag "user[roles][]", "" %>

  <div class="actions">

    <%= f.submit %>

  </div>

<% end %>

# /app/model/user.rb

class User < ActiveRecord::Base

  ROLES = %w[admin blog_author]

  def roles=(roles)

    self.roles_mask = (roles & ROLES).map { |r| 2**ROLES.index(r) }.inject(0, :+)

  end

  def roles

    ROLES.reject do |r|

      ((roles_mask.to_i || 0) & 2**ROLES.index(r)).zero?

    end

  end

  def is?(role)

    roles.include?(role.to_s)

  end

  # Include default devise modules. Others available are:

  # :confirmable, :lockable, :timeoutable and :omniauthable

  devise :database_authenticatable, :registerable, :recoverable, :rememberable, :trackable, :validatable

end

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