Add an attribute to devise.

I did this for a user resource like this:

in my schema file my user table is defined as``` create_table "users", force: true do |t| t.string "name", null: false t.string "email", null: false t.string "password_digest", null: false t.boolean "admin", default: false end

in my user model I have a predicate method is_admin? I also use validations to insure admin has a value.

class User < ActiveRecord::Base

has_secure_password validates :password, presence: true validates :email, presence: true, uniqueness: true validates :admin, :inclusion => {:in => [true, false]}

def is_admin? self.admin == true end

end

I also use a method in my sessions controller to define current user:

module SessionsHelper

def log_in(user) session[:user_id] = user.id end

def current_user @current_user ||= User.find_by(id: session[:user_id]) end

def logged_in? current_user.present? end

def authenticate redirect_to login_path unless logged_in? end

def log_out! session[:user_id] = nil end

end

finally in controllers I have my application controller:

class ApplicationController < ActionController::Base. protect_from_forgery with: :exception

include SessionsHelper helper_method :current_user, :logged_in?, :authenticate

end

in my user controller I define authorize admin only in my private methods

def authorize_admin_only unless current_user.is_admin? redirect_to user_path(current_user) end end

def authorize_user_only unless current_user == @user redirect_to user_path(current_user) end end

def authorize_user_or_admin unless current_user == @user || current_user.is_admin? redirect_to user_path(current_user) end end

I load these methods by calling before like this:

before_action :authorize_admin_only, only: :index before_action :authorize_user_or_admin, except: [:index, :new, :create]

then when I define a method like index I set it to admin use only like this:

def index authorize_admin_only @users = User.all end

hope this helps