Question

I’m trying to make a sample login with has_secure_password. The gem file is added, but this error persists:

undefined local variable or method `password_digest' for #<User:0x23129a0>
app/controllers/sessions_controller.rb:8:in `create'

In this file

sessions_controller.rb

line 8 looks like this:

if user and user.authenticate(params[:password])

---

class SessionsController < ApplicationController
  def new

  end

  def create
    user = User.find_by_name(params[:name])
    if user and user.authenticate(params[:password])
      session[:user_id] = user.id
      redirect_to admin_url , notice: "Login efetuado com sucesso."
     else
       flash[:notice] = 'Usuario ou senha errados'
       redirect_to login_url
    end
  end

  def destroy
    session[:user_id] = nil
    redirect_to login_url, notice: "Logout Efetuado com sucesso."
  end
end

Answer 1

I agree with Béla that this is a duplicate. However, here are step-by-step instructions in case the original answer wasn’t clear enough.

To add the password_digest to your user model…

In the console do:

$ rails generate migration AddPasswordDigestToUsers

This will create a file something like: /db/migrate/20120419234606_add_password_digest_to_users (The fourteen digits at the beginning of your file will be different than mine since it’s basically a time stamp for when you ran the generate command. You can read more on generating stand alone migrations here.)

Open the migration file you just created and edit so it looks something like this:

class AddPasswordDigestToUsers < ActiveRecord::Migration
  def change
    add_column :users, :password_digest, :string
  end
end

Save and close the file. Then, in the console, run:

$ bundle exec rake db:migrate
$ bundle exec rake db:test:prepare

At this point, your user model should have the password_digest attribute and (hopefully) you won’t get the error any more.