add stripe-gem and payment schema

Gemfile

@@ -184,6 +184,9 @@ gem 'faker'
 # for seeds
 gem 'factory_girl_rails'
 
+# for integrating Stripe payment gateway
+gem 'stripe'
+
 # Use guard and spring for testing in development
 group :development do
   # to launch specs when files are modified

Gemfile.lock

@@ -481,6 +481,8 @@ GEM
       activesupport (>= 3.0)
       sprockets (>= 2.8, < 4.0)
     sqlite3 (1.3.9)
+    stripe (1.43.0)
+      rest-client (~> 1.4)
     term-ansicolor (1.3.2)
       tins (~> 1.0)
     thor (0.19.1)
@@ -615,6 +617,7 @@ DEPENDENCIES
   shoulda-matchers
   spring-commands-rspec
   sqlite3
+  stripe
   timecop
   transitions
   turbolinks

db/migrate/20160606040848_create_payments.rb

@@ -0,0 +1,14 @@
+class CreatePayments < ActiveRecord::Migration
+  def change
+    create_table :payments do |t|
+      t.string :last4, null: false
+      t.integer :amount, null: false
+      t.string :authorization_code, null: false
+      t.integer :status, default: 0, null: false
+      t.integer :user_id, null: false
+      t.integer :conference_id, null: false
+
+      t.timestamps null: false
+    end
+  end
+end

db/migrate/20160610073948_add_payment_id_to_ticket_purchases.rb

@@ -0,0 +1,5 @@
+class AddPaymentIdToTicketPurchases < ActiveRecord::Migration
+  def change
+    add_column :ticket_purchases, :payment_id, :integer
+  end
+end

db/schema.rb

@@ -263,6 +263,17 @@ ActiveRecord::Schema.define(version: 20160704092023) do
     t.datetime "updated_at"
   end
 
+  create_table "payments", force: :cascade do |t|
+    t.string   "last4",                          null: false
+    t.integer  "amount",                         null: false
+    t.string   "authorization_code",             null: false
+    t.integer  "status",             default: 0, null: false
+    t.integer  "user_id",                        null: false
+    t.integer  "conference_id",                  null: false
+    t.datetime "created_at",                     null: false
+    t.datetime "updated_at",                     null: false
+  end
+
   create_table "programs", force: :cascade do |t|
     t.integer  "conference_id"
     t.integer  "rating",               default: 0
@@ -423,6 +434,7 @@ ActiveRecord::Schema.define(version: 20160704092023) do
     t.datetime "created_at"
     t.integer  "quantity",      default: 1
     t.integer  "user_id"
+    t.integer  "payment_id"
   end
 
   create_table "tickets", force: :cascade do |t|