undefined method `authenticate' for #

Question

I am new in ruby. I have tried to make a login page. But I am getting this error.

Here is my coding -

users_controller.rb

def login
    @title = 'Login'
    render layout: 'login'
  end
  def create_login
    #user = User.find_by(username: params[:user][:username].downcase).first
    user = User.where("username = ?", params[:user][:username].downcase).first
    if user && user.authenticate(params[:user][:password])
      # Log the user in and redirect to the user's show page.
      log_in @user
      redirect_to @user
    else
      flash[:danger] = 'Invalid email/password combination' # Not quite right!
      render 'new'
    end
  end

router.rb

get    'login'   => 'users#login'
post   'login'   => 'users#create_login'

sessions_helper.rb

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

user.rb

class User < ActiveRecord::Base
  validates :name, presence: true


  validates :name, length: { minumum:2, maximum: 30 }


  #validates :password, presence: true
  #validates :password, length: { in: 6..20 }
  validates :password, :presence =>true,
                    :length => { :minimum => 6, :maximum => 40 },
                    :confirmation =>true
  #validates_presence_of :password_confirmation, if: :password_changed?


  #validates_uniqueness_of :username
  #validates :email, confirmation: true
  validates :username, :presence => true,
           :uniqueness => { :case_sensitive => false }

  email_regex = /\A[\w+\-.]+@[a-z\d\-.]+\.[a-z]+\z/i
  validates :email, :presence => true,
           :format => { :with => email_regex },
           :uniqueness => { :case_sensitive => false }

  validates :dob, presence: true
  #dob_regex = /\d{2}\-\d{2}\-\d{4}/       
  #validates :dob, :presence => true, :format => { :with => dob_regex }
end

@Pavan I am updating my question. Please check `user.rb` model — Chinmay235, Apr 12 '16 at 08:23
Well, you should be having `authenticate` method in `user.rb` model. Are you following any tutorial to make this authenticate logic in your app? — Pavan, Apr 12 '16 at 08:26
It looks like you should be including some authentication gem perhaps. — Max Williams, Apr 12 '16 at 08:28
Yes I am following https://www.railstutorial.org/book/log_in_log_out tutorial. But there are no any authentication. Please check. And let me know how to give authentication in my page. — Chinmay235, Apr 12 '16 at 08:28
You should create your authenticate method. http://railscasts.com/episodes/250-authentication-from-scratch — , Apr 12 '16 at 08:42

score 1 · Accepted Answer · answered Apr 12 '16 at 08:36

1

The tutorial that you're following uses bcrypt gem. Check if it is on your gemfile and bundle install.

For authenticate method follow this tutorial from railscasts using bcrypt

Part of railscast authentication method:

def self.authenticate(email, password)
  user = find_by_email(email)
  if user && user.password_hash == BCrypt::Engine.hash_secret(password, user.password_salt)
    user
  else
    nil
  end
end

answered Apr 12 '16 at 08:36

HashRocket

778
1
5
15

Which line I will adding in the `Gemfile` this `gem "bcrypt-ruby", :require => "bcrypt"` or `gem 'bcrypt', '~> 3.1.7'`? – Chinmay235 Apr 12 '16 at 08:53
`gem 'bcrypt', '~> 3.1.7'` – Rajarshi Das Apr 12 '16 at 08:55
But here is mention 1st one http://railscasts.com/episodes/250-authentication-from-scratch – Chinmay235 Apr 12 '16 at 08:58
Use `gem "bcrypt-ruby", :require => "bcrypt"` as what railscast tutorial did. – HashRocket Apr 12 '16 at 08:59
@HashRocket thank you. Let me do this in my project. – Chinmay235 Apr 12 '16 at 09:00
@Chinu, please accept the answer it helps you thanks! – HashRocket Apr 12 '16 at 09:00
@HashRocket after adding this line in my Gemfile. I am install bundle then start server in command prompt. But my server not start – Chinmay235 Apr 12 '16 at 09:01
What does the server respond? – HashRocket Apr 12 '16 at 09:02
Let us [continue this discussion in chat](http://chat.stackoverflow.com/rooms/108900/discussion-between-chinu-and-hashrocket). – Chinmay235 Apr 12 '16 at 09:03

Rajarshi Das · Answer 2 · 2016-04-12T08:49:54.010

0

In your user model you need to add has_secure_password

and

Add bcrypt (~> 3.1.7) to Gemfile to use has_secure_password:

gem 'bcrypt', '~> 3.1.7'

and

class User < ActiveRecord::Base
  #your other code
  has_secure_password
end

now access the authenticate method

undefined method `authenticate' for #

2 Answers2