Add distributor_name_alias to searchable attributes and implement ransacker for filtering line items

app/assets/javascripts/admin/line_items/controllers/line_items_controller.js.coffee

@@ -19,7 +19,7 @@ angular.module("admin.lineItems").controller 'LineItemsCtrl', ($scope, $timeout,
   $scope.page = 1
   $scope.per_page = $scope.per_page_options[0].id
   $scope.filterByVariantId = null
-  searchThrough = ["order_distributor_name",
+  searchThrough = ["order_distributor_name_alias",
     "order_bill_address_phone",
     "order_bill_address_firstname",
     "order_bill_address_lastname",

app/models/spree/order.rb

@@ -9,7 +9,7 @@ module Spree
     include SetUnusedAddressFields
 
     searchable_attributes :number, :state, :shipment_state, :payment_state, :distributor_id,
-                          :order_cycle_id, :email, :total, :customer_id
+                          :order_cycle_id, :email, :total, :customer_id, :distributor_name_alias
     searchable_associations :shipping_method, :bill_address, :distributor
     searchable_scopes :complete, :incomplete, :sort_by_billing_address_name_asc,
                       :sort_by_billing_address_name_desc
@@ -181,6 +181,11 @@ module Spree
     scope :by_state, lambda { |state| where(state:) }
     scope :not_state, lambda { |state| where.not(state:) }
 
+    # This is used to filter line items by the distributor name on BOM page
+    ransacker :distributor_name_alias do
+      Arel.sql("distributor.name")
+    end
+
     def initialize(*_args)
       @checkout_processing = nil
       @manual_shipping_selection = nil