add cashier zone terminal

app/controllers/origami/shifts_controller.rb

@@ -8,12 +8,23 @@ class Origami::ShiftsController < ApplicationController#BaseOrigamiController
 
   def new
     @float = Lookup.where('lookup_type=?','float_value')
-    @terminal = CashierTerminal.all
+    @terminal = CashierTerminal.available
   end
 
   def create
     opening_balance = params[:opening_balance]
-    cashier_terminal = params[:cashier_terminal]
+    cashier_terminal_param = params[:cashier_terminal]
+
+    cashier_terminal = CashierTerminal.find(cashier_terminal_param)
+    if cashier_terminal.is_currently_login
+      respond_to do |format|
+        format.html { redirect_to settings_order_queue_stations_url, notice: 'Cashier Terminal already signin!' }        
+      end
+    end
+
+    cashier_terminal.is_currently_login = 1
+    cashier_terminal.save
+
     @shift = ShiftSale.new
     @shift.create(opening_balance,cashier_terminal, current_user)
   end

app/models/cashier_terminal.rb

@@ -1,4 +1,6 @@
 class CashierTerminal < ApplicationRecord
 	has_many :cashier_terminal_by_zones 
   	has_many :zones, through: :cashier_terminal_by_zones
+
+  	scope :available, -> {where(is_currently_login: false)}
 end