Rails 5.2 application fixes

- Rename before_filter → before_action across all controllers
- Fix string conditions in validators to lambda syntax (node.rb)
- Fix publish_draft!: move staged slug/parent logic outside draft guard,
  use move_to_child_of for parent changes, add nil guard for no-op calls
- Fix update_unique_names_of_children: use parent_id traversal instead
  of lft/rgt descendants (awesome_nested_set 3.x lft/rgt update bug)
- Fix unique_path to return Array instead of String
- Fix Occurrence.delete_all syntax for Rails 5
- Fix Page.find_with_outdated_translations: use includes instead of all
- Fix outdated_translations?: use find instead of splat array

1 files changed, 1 insertions, 1 deletions

diff --git a/app/models/occurrence.rb b/app/models/occurrence.rb
index 0760d5e..8457ffd 100644
--- a/app/models/occurrence.rb
+++ b/app/models/occurrence.rb
@@ -26,7 +26,7 @@ class Occurrence < ActiveRecord::Base
   # variables are set to save repetitive queries. The occurrences of the given
   # event are then calculated and created.
   def self.generate event
-    self.delete_all(:event_id => event.id)
+    self.where(:event_id => event.id).delete_all
     
     node        = event.node
     duration    = (event.end_time - event.start_time)