before sync

app/models/sale_tax.rb

@@ -8,18 +8,20 @@ class SaleTax < ApplicationRecord
   def self.sync_sale_tax_records(sale_taxes)
     if !sale_taxes.nil?
       sale_taxes.each do |t|
-        unless SaleTax.exists?(t['sale_tax_id'])
+        tax = SaleTax.find_by_sale_tax_id(t['sale_tax_id'])
+        # unless SaleTax.exists?(t['sale_tax_id'])
+        if tax.nil?
           tax = SaleTax.new
-          tax.sale_tax_id = t['sale_tax_id']
-          tax.sale_id = t['sale_id']
-          tax.tax_name = t['tax_name']
-          tax.tax_rate = t['tax_rate']
-          tax.tax_payable_amount = t['tax_payable_amount']
-          tax.inclusive = t['inclusive']
-          tax.save
-          puts '...... Sale Tax has been created .....'
         end
+        tax.sale_tax_id = t['sale_tax_id']
+        tax.sale_id = t['sale_id']
+        tax.tax_name = t['tax_name']
+        tax.tax_rate = t['tax_rate']
+        tax.tax_payable_amount = t['tax_payable_amount']
+        tax.inclusive = t['inclusive']
+        tax.save
       end
+      puts '...... Sale Tax sync completed .....'
     end
   end