Record 'whodunnit' in paper trail of past versions

  The PaperTrail API has changed, so we have to modify the code
  to continue to record 'whodunnit' (who changed the data)
  in past versions recorded by PaperTrail.

Signed-off-by: David A. Wheeler <dwheeler@dwheeler.com>

app/controllers/application_controller.rb

@@ -3,6 +3,9 @@ class ApplicationController < ActionController::Base
   # For APIs, you may want to use :null_session instead.
   protect_from_forgery with: :exception
 
+  # For the PaperTrail gem
+  before_action :set_paper_trail_whodunnit
+
   # Limit time before must log in again.
   before_action :validate_session_timestamp
   after_action :persist_session_timestamp

config/initializers/paper_trail.rb

@@ -0,0 +1 @@
+PaperTrail.config.track_associations = false