fixed by total sort column

app/models/invoice.rb

@@ -30,6 +30,8 @@ class Invoice < ApplicationRecord
   delegate :enable_deposit?, to: :enable_deposit?
   delegate :deposit, to: :deposit
 
+  attr_accessor :vat_rate
+
   scope :with_search_scope, (lambda do |origin|
     if origin.present?
       if numeric?(origin)
@@ -61,15 +63,6 @@ class Invoice < ApplicationRecord
                 Time.zone.today + number_of_days, statuses[:issued])
         }
 
-  def self.with_totals
-    select("invoices.*,
-            (CASE WHEN auctions.enable_deposit
-              THEN ROUND((invoices.cents / 100.0 * (1 + COALESCE(invoices.vat_rate, 0.0)) - auctions.requirement_deposit_in_cents / 100.0), 2)
-              ELSE ROUND((invoices.cents / 100.0 * (1 + COALESCE(invoices.vat_rate, 0.0))), 2)
-            END) AS total_value")
-      .joins(result: :auction)
-  end
-
   def self.search(params = {})
     sort_column = params[:sort].presence_in(%w[paid_through
                                                paid_amount
@@ -92,7 +85,17 @@ def self.search(params = {})
     when 'billing_profile_name'
       query.left_outer_joins(:billing_profile).order("billing_profiles.name #{sort_direction}")
     when 'total'
-      query.with_totals.order("total_value #{sort_direction} NULLS LAST")
+      invoices_array = query.to_a
+      sorted_invoices = if sort_direction == 'asc'
+                          invoices_array.sort_by(&:total)
+                        else
+                          invoices_array.sort_by(&:total).reverse
+                        end
+
+      ids_order = sorted_invoices.map(&:id)
+      ids_order_string = ids_order.join(',')
+
+      query.where(id: ids_order).order(Arel.sql("position(id::text in '#{ids_order_string}')"))
     else
       query.order("#{sort_column} #{sort_direction} NULLS LAST")
     end