Add booth limit

db/migrate/20170728182033_add_booth_limit_to_conferences.rb

@@ -0,0 +1,5 @@
+class AddBoothLimitToConferences < ActiveRecord::Migration
+  def change
+    add_column :conferences, :booth_limit, :integer, default: 0
+  end
+end

db/schema.rb

@@ -127,6 +127,7 @@ ActiveRecord::Schema.define(version: 20170807092805) do
     t.integer  "end_hour",           default: 20
     t.integer  "organization_id"
     t.integer  "ticket_layout",      default: 0
+    t.integer  "booth_limit",        default: 0
   end
 
   add_index "conferences", ["organization_id"], name: "index_conferences_on_organization_id"