user_auth.md

User Auth Rails app: What we're adding:

User model

rails g model user username:string password_hash:string

user_id foreign key in tables (user has many cars)

generate a migration

rails generate migration addUserId

add the foreign key to the cars table

class AddUserId < ActiveRecord::Migration
  def change
    add_reference :cars, :user
  end
end

a login form

this requires some routes:

  resources :users

  get    'login'   => 'sessions#new'
  post   'login'   => 'sessions#create'
  delete 'logout'  => 'sessions#destroy'

<%= form_for(:session, url: login_path) do |f| %>

    <%= f.label :username %>
    <%= f.text_field :username %>

    <%= f.label :password %>
    <%= f.password_field :password %>

  <%= f.submit "log in"%>
<% end %>

a register form

  post   'login'   => 'sessions#create'

<%= form_for(:user, url: login_path) do |f| %>

    <%= f.label :username %>
    <%= f.text_field :username %>

    <%= f.label :password %>
    <%= f.password_field :password %>

    <%= f.label :password_confirmation %>
    <%= f.password_field :password_confirmation %>

  <%= f.submit "log in"%>
<% end %>

an edit user form
logout link

<%= link_to 'logout!', logout_path, :method => 'delete' %>

logout session destroy method

session_reset

cars controller

def index                                                           
    if( ! session[:user].nil? )

      @current_user = User.find( session[:user]['id'] )

      @cars = @current_user.cars

    else

      @cars = Car.all

    end
end

sessions create
require at the top of your controller: require 'digest/md5'

def create                                                                                [15/958]

    password = login_params[:password_hash]
    username = login_params[:username]

    user_object = User.find_by_username( username )

    password_hash = Digest::MD5.hexdigest( password )

    if( user_object.password_hash == password_hash )

      session[:user] = user_object

      redirect_to '/'
    else
      redirect_to '/login'
    end

  end

seed file:

require 'digest/md5'

password_hash = Digest::MD5.hexdigest( "bannanna" )

user1 = User.create( username: "thom", password_hash: password_hash )
user2 = User.create( username: "akira", password_hash: password_hash )
User.create( username: "joe", password_hash: password_hash )
User.create( username: "jason", password_hash: password_hash )


user1.cars.create(make: "Jeep", model: "Cherokee", color: "red", year: nil)

user1.cars.create(make: "Ford", model: "Taurus", color: "doodoo", year: nil)

user2.cars.create(make: "Jeep", model: "Wrangler", color: "yellow", year: 2003)

user2.cars.create(make: "Nissan", model: "Juke", color: "black", year: 2012)

awongh/user_auth.md

User Auth Rails app: What we're adding: