Refactor admin/call_for_booth controller

db/migrate/20170606182954_create_call_for_booths.rb

@@ -4,6 +4,7 @@ class CreateCallForBooths < ActiveRecord::Migration
       t.date :start_date
       t.date :end_date
       t.integer :booth_limit
+      t.references :conference
 
       t.timestamps null: false
     end

db/schema.rb

@@ -11,8 +11,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-
-ActiveRecord::Schema.define(version: 20170531094819) do
+ActiveRecord::Schema.define(version: 20170606182954) do
 
   create_table "ahoy_events", force: :cascade do |t|
     t.uuid     "visit_id",   limit: 16
@@ -54,6 +53,15 @@ ActiveRecord::Schema.define(version: 20170531094819) do
     t.datetime "updated_at",    null: false
   end
 
+  create_table "call_for_booths", force: :cascade do |t|
+    t.date     "start_date"
+    t.date     "end_date"
+    t.integer  "booth_limit"
+    t.integer  "conference_id"
+    t.datetime "created_at",    null: false
+    t.datetime "updated_at",    null: false
+  end
+
   create_table "campaigns", force: :cascade do |t|
     t.integer  "conference_id"
     t.string   "name"