Creating a simple User model with secure password and image profile (gravatar)

Gemfile

# To use ActiveModel has_secure_password
gem 'bcrypt-ruby', '~> 3.0.0'

steps

1. Un-comment the 'bcrypt-ruby' gem in generated Rails Gemfile

2. Generate the User model

                  $ rails generate model User name username email password_digest avatar_url

3. Edit user.rb model file to add set model attributes that can be set via mass-assignment, add 'has_secure_password' helper method, another methods and some model validations

Thats it, Happy Codding!!!

user.rb

class User < ActiveRecord::Base
  attr_accessible :avatar_url, :email, :name, :password, :password_confirmation, :username
  has_secure_password
  before_validation :prep_email
  before_save :create_avatar_url

  validates :name, presence: true
  validates :username, uniqueness: true, presence: true
  validates :email, uniqueness: true, presence: true, format: { with: /^[\w.+-]+@([\w]+.)+\w+$/ }

  def create_avatar_url
    self.avatar_url = "http://gravatar.com/avatar/#{Digest::MD5.hexdigest(self.email)}?s=50"
  end

  private
  def prep_email
    self.email = self.email.strip.downcase if self.email
  end
end