Only shows order that actually have at least one line_item

Filter inside the API to shows only orders that have at least one line items

app/models/spree/order.rb

@@ -106,6 +106,10 @@ module Spree
     before_save :update_payment_fees!, if: :complete?
 
     # -- Scopes
+    scope :not_empty, -> {
+      joins(:line_items).group(:id).having("count(spree_line_items.id) > 0")
+    }
+
     scope :managed_by, lambda { |user|
       if user.has_spree_role?('admin')
         where(nil)

app/services/search_orders.rb

@@ -23,7 +23,8 @@ class SearchOrders
   end
 
   def search_query
-    base_query = ::Permissions::Order.new(current_user).editable_orders
+    base_query = ::Permissions::Order.new(current_user).editable_orders.not_empty
+
     return base_query unless params[:shipping_method_id]
 
     base_query