Stage 4: Rails 5.2 -> 6.1 on Ruby 2.7.2

- routing-filter 0.6.3 -> 0.7.0 (Rails 6.1 compatibility)
- RSS named routes rss_xml/rss_rdf added
- RouteWithParams workarounds: will_paginate_patch, content_path shim, safe_path helper
- Paperclip removed, replaced with FileAttachment concern (preserves URL scheme)
- Assets resource moved to /admin/assets (Sprockets middleware conflict)
- ApplicationRecord base class added, all models migrated
- Strong parameters added to Assets, Occurrences, Events, MenuItems controllers
- update_attributes -> update throughout
- render :nothing -> head :ok/:not_found throughout
- language_selector rewritten (removes :overwrite_params)
- Environment files updated for Rails 6.1 (eager_load, public_file_server, ActionMailer)
- Arel::Visitors::DepthFirst and Integer/Float duration patches removed from test_helper
- AssetsController tests added (10 tests covering upload, variants, destroy, auth)
- ImageMagick geometry: 460x250! for headline crop (not # which is invalid in IM6)

129 runs, 311 assertions, 5 failures (all pre-existing), 0 errors

1 files changed, 1 insertions, 1 deletions

diff --git a/app/models/occurrence.rb b/app/models/occurrence.rb
index 8457ffd..3baf447 100644
--- a/app/models/occurrence.rb
+++ b/app/models/occurrence.rb
@@ -1,7 +1,7 @@
 # TODO Make a gem out of the c wrapper
 require 'chaos_calendar'
 
-class Occurrence < ActiveRecord::Base
+class Occurrence < ApplicationRecord
   
   # Associations