Update qbo_invoice.rb

app/models/qbo_invoice.rb

@@ -55,11 +55,13 @@ class QboInvoice < ActiveRecord::Base
     
     # Scan the line items for hashtags and attach to the applicable issues
     invoice.line_items.each { |line|
+      if line.description
         line.description.scan(/#(\w+)/).flatten.each { |issue|
           i = Issue.find_by_id(issue.to_i)
           i.qbo_invoice = QboInvoice.find_by_id(invoice.id.to_i)
           i.save!
         }
+      end
     }
   end