add payment mode to conferences schema

app/models/conference.rb

@@ -57,6 +57,9 @@ class Conference < ActiveRecord::Base
   validates_format_of :short_title, with: /\A[a-zA-Z0-9_-]*\z/
   validates :registration_limit, numericality: { only_integer: true, greater_than_or_equal_to: 0 }
 
+  validates :payment_method, presence: true, null: false, inclusion: {in: %w(online offline),
+                                                                      message: "'%{value}' is not a valid payment method"}
+
   # This validation is needed since a conference with a start date greater than the end date is not possible
   validate :valid_date_range?
   before_create :generate_guid

db/migrate/20160603043546_add_payment_method_to_conferences.rb

@@ -0,0 +1,5 @@
+class AddPaymentMethodToConferences < ActiveRecord::Migration
+  def change
+    add_column :conferences, :payment_method, :string, default: 'offline', null: false
+  end
+end

db/schema.rb

@@ -11,7 +11,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 20160427104236) do
+ActiveRecord::Schema.define(version: 20160603043546) do
 
   create_table "ahoy_events", force: :cascade do |t|
     t.uuid     "visit_id",   limit: 16
@@ -102,6 +102,7 @@ ActiveRecord::Schema.define(version: 20160427104236) do
     t.text     "description"
     t.integer  "registration_limit",    default: 0
     t.string   "picture"
+    t.string   "payment_method",        default: "offline", null: false
   end
 
   create_table "conferences_questions", id: false, force: :cascade do |t|

spec/factories/conferences.rb

@@ -9,6 +9,7 @@ FactoryGirl.define do
     end_date { 6.days.from_now }
     registration_limit 0
     description { Faker::Hipster.paragraph }
+    payment_method 'offline'
 
     after(:create) do |conference|
       Role.where(name: 'organizer', resource: conference).first_or_create(description: 'For the organizers of the conference (who shall have full access)')

spec/models/conference_spec.rb

@@ -1545,6 +1545,20 @@ describe Conference do
       should validate_presence_of(:end_date)
     end
 
+    it 'is not valid without payment mode' do
+      should validate_presence_of(:payment_method)
+    end
+
+    it 'is valid with payment mode as Online' do
+      should allow_value('online').for(:payment_method).
+        with_message("'%{value}' is not a valid payment method")
+    end
+
+    it 'is valid with payment mode as Offline' do
+      should allow_value('offline').for(:payment_method).
+        with_message("'%{value}' is not a valid payment method")
+    end
+
     it 'is not valid with a duplicate short title' do
       should validate_uniqueness_of(:short_title)
     end