db/migrate/[timestamp]_add_admin_to_users.rb
class AddAdminToUsers < ActiveRecord::Migration
  def change
    add_column :users, :admin, :boolean, default: false

    #Start - Adding for gender and dob
    add_column :users, :date_of_birth, :datetime
    add_column :users, :is_female, :boolean, default: false
    #End - Adding for gender and dob

  end
end

class User < ActiveRecord::Base
.
.
GENDER_TYPES = [ ["Male","0"], [ "Female","1" ] ]
validates :is_female, presence: true, inclusion: { in: ["0","1"] }
.
.

class UsersController < ApplicationController
.
.
  private

    def user_params
      params.require(:user).permit(:name, :email, :password,
                                   :password_confirmation, :is_female, :date_of_birth)
    end
.
.

Started POST "/users" for 1.39.63.200 at 2014-10-30 12:26:54 +0000
Processing by UsersController#create as HTML
  Parameters: {"utf8"=>"_", "authenticity_token"=>"X1CF1B0ds3fn6QbPE4HhD/AAHo9n6D5+e8oHwgyiU4wSzV3hdUeKCE1Mr3PHJKYx7GPhwmpksYVxS/QmqpwjuQ==", "user"=>{"name"=>"Kumar", "email"=>"test12@test.com", "password"=>"[FILTERED]", "password_confirmation"=>"[FILTERED]", "is_female"=>"1", "date_of_birth(1i)"=>"2017", "date_of_birth(2i)"=>"10", "date_of_birth(3i)"=>"30"}, "commit"=>"Create my account"}
   (0.1ms)  begin transaction
  User Exists (0.3ms)  SELECT  1 AS one FROM "users" WHERE LOWER("users"."email") = LOWER('test12@test.com') LIMIT 1
   (0.1ms)  rollback transaction
  Rendered shared/_error_messages.html.erb (0.7ms)
  Rendered users/new.html.erb within layouts/application (8.0ms)
  Rendered layouts/_shim.html.erb (0.1ms)
  Rendered layouts/_header.html.erb (0.6ms)
  Rendered layouts/_footer.html.erb (0.3ms)
Completed 200 OK in 681ms (Views: 571.3ms | ActiveRecord: 1.5ms)
1.39.63.200 - - [30/Oct/2014:12:26:55 +0000] "POST /users HTTP/1.1" 200 - 0.7922

--- !ruby/hash:ActionController::Parameters
utf8: "✓"
authenticity_token: X1CF1B0ds3fn6QbPE4HhD/AAHo9n6D5+e8oHwgyiU4wSzV3hdUeKCE1Mr3PHJKYx7GPhwmpksYVxS/QmqpwjuQ==
user: !ruby/hash:ActionController::Parameters
  name: Kumar
  email: test12@test.com
  password: testtest
  password_confirmation: testtest
  is_female: '1'
  date_of_birth(1i): '2017'
  date_of_birth(2i): '10'
  date_of_birth(3i): '30'
commit: Create my account
controller: users
action: create

The form contains 1 error.

    Is female is not included in the list