Added Token field for physical_ticket

Added token field in physical_ticket model. This token will also be stored in the qr code and will uniqely identify the ticket.

app/controllers/physical_ticket_controller.rb

@@ -1,7 +1,7 @@
 class PhysicalTicketController < ApplicationController
   before_action :authenticate_user!
   load_resource :conference, find_by: :short_title
-  load_and_authorize_resource
+  load_and_authorize_resource find_by: :token
   authorize_resource :conference_registrations, class: Registration
 
   def index

app/models/physical_ticket.rb

@@ -4,4 +4,19 @@ class PhysicalTicket < ActiveRecord::Base
   has_one :conference, through: :ticket_purchase
   has_one :user, through: :ticket_purchase
   has_many :ticket_scannings
+
+  before_create :set_token
+
+  private
+
+  def set_token
+    self.token = generate_token
+  end
+
+  def generate_token
+    loop do
+      token = SecureRandom.hex(10)
+      break token unless PhysicalTicket.exists?(token: token)
+    end
+  end
 end

app/views/admin/physical_ticket/index.html.haml

@@ -32,12 +32,12 @@
                   .btn-group
                     = link_to 'Show',
                     conference_physical_ticket_path(@conference.short_title,
-                                                          physical_ticket.id),
+                                                    physical_ticket.token),
                     class: 'btn btn-primary'
                     = link_to 'Generate PDF',
                     conference_physical_ticket_path(@conference.short_title,
-                                                          physical_ticket.id,
-                                                          format: :pdf),
+                                                    physical_ticket.token,
+                                                    format: :pdf),
                     class: 'button btn btn-default btn-info'
   - else
     %h5 No Tickets sold!

app/views/physical_ticket/index.html.haml

@@ -24,11 +24,11 @@
                   .btn-group
                     = link_to 'Show',
                     conference_physical_ticket_path(@conference.short_title,
-                                                    physical_ticket.id),
+                                                    physical_ticket.token),
                     class: 'btn btn-primary'
                     = link_to 'Generate PDF',
                     conference_physical_ticket_path(@conference.short_title,
-                                                    physical_ticket.id,
+                                                    physical_ticket.token,
                                                     format: :pdf),
                     class: 'button btn btn-default btn-info'
       - else

app/views/physical_ticket/show.html.haml

@@ -72,6 +72,6 @@
       %p.text-left
         = link_to 'Generate PDF',
         conference_physical_ticket_path(@conference.short_title,
-                                        @physical_ticket.id,
+                                        @physical_ticket.token,
                                         format: :pdf),
         class: 'button btn btn-default btn-info'