add cashier zone in ui

app/models/cashier_terminal.rb

@@ -1,2 +1,4 @@
 class CashierTerminal < ApplicationRecord
+	has_many :cashier_terminal_by_zones 
+  	has_many :zones, through: :cashier_terminal_by_zones
 end

app/models/cashier_terminal_by_zone.rb

@@ -1,2 +1,4 @@
 class CashierTerminalByZone < ApplicationRecord
+	belongs_to :zone
+  	belongs_to :cashier_terminal
 end

app/models/zone.rb

@@ -3,6 +3,7 @@ class Zone < ApplicationRecord
  has_many :tables, dependent: :destroy
  has_many :rooms, dependent: :destroy
  has_many :order_queue_stations
+ has_many :cashier_terminals
 
  # validations
  validates_presence_of :name, :created_by