Fix bug.

app/models/venue_management_bill.rb

@@ -2,6 +2,7 @@ require 'orbit_form_helper'
 class VenueManagementBill
   include Mongoid::Document
   include Mongoid::Timestamps
+  require 'mongoid/enum'
   include Mongoid::Enum
   BILLTYPE = {'venue_fee'=>["usage_fee", "royalties", "admin_fee", "land_rent"],'utility_bill'=>['electricity','water'],'tax'=>['house_tax','land_tax'],'prejudgment_interest'=>["usage_fee", "royalties", "admin_fee", "land_rent",'electricity','water','house_tax','land_tax','other'],'other'=>['penalty','other']}
   NOTFIELDKEY = ['float','fields','clear','no_margin','unit','display_title','display_unit','option_select']

app/models/venue_management_contract.rb

@@ -5,6 +5,7 @@ require 'orbit_form_helper'
 class VenueManagementContract
   include Mongoid::Document
   include Mongoid::Timestamps
+  require 'mongoid/enum'
   include Mongoid::Enum
 
   PAYERS = [ :school, :vendor].freeze

app/models/venue_management_inviting.rb

@@ -5,6 +5,7 @@ require 'orbit_form_helper'
 class VenueManagementInviting
   include Mongoid::Document
   include Mongoid::Timestamps
+  require 'mongoid/enum'
   include Mongoid::Enum
   include OrbitTag::Taggable
   PAYERS = [ :school, :vendor].freeze

app/models/venue_management_memorabilia.rb

@@ -1,6 +1,7 @@
 class VenueManagementMemorabilia
   include Mongoid::Document
   include Mongoid::Timestamps
+  require 'mongoid/enum'
   include Mongoid::Enum
 
   field :event_date, type: Date, default: Time.now