Update customer.rb

app/models/customer.rb

@@ -105,6 +105,8 @@ class Customer < ActiveRecord::Base
   def self.sync 
     last = Qbo.first.last_sync
     
+    background do
+    
       query = "Select Id, DisplayName From Customer"
       query << " Where Metadata.LastUpdatedTime >= '#{last.iso8601}' " if last
       query << " Order By DisplayName "
@@ -121,6 +123,8 @@ class Customer < ActiveRecord::Base
         end
       end
     
+    end
+    
     # remove deleted customers
     #where.not(customers.map(&:id)).destroy_all
   end