suggested chang to fix issue #20 (https://github.com/PRX/apn_on_rails/issues#issue/20) #25

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Commits on Jan 27, 2011
  1. modified send_notifications_for_cert routine to decrease db load

    andreasmueller committed Jan 27, 2011
    Rather than making a query for each device, we can get all unsent
    notifications for a given app with one SQL query.
    
    The change also required a slight update of the app_spec.
  2. specify :select in find to avoid :read_only

    andreasmueller committed Jan 27, 2011
    The APN::Notification.find call returned read-only ActiveRecords, which
    can be prevented by specifying :select.
    
    -> see http://stackoverflow.com/questions/639171/what-is-causing-this-activerecordreadonlyrecord-error