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-rw-r--r--activerecord/lib/active_record/acts/tree.rb5
1 files changed, 5 insertions, 0 deletions
diff --git a/activerecord/lib/active_record/acts/tree.rb b/activerecord/lib/active_record/acts/tree.rb
index 5fd1a59334..61163941d3 100644
--- a/activerecord/lib/active_record/acts/tree.rb
+++ b/activerecord/lib/active_record/acts/tree.rb
@@ -1,6 +1,11 @@
module ActiveRecord
module Acts #:nodoc:
module Tree #:nodoc:
+ def self.append_features(base)
+ super
+ base.extend(ClassMethods)
+ end
+
# Specify this act if you want to model a tree structure by providing a parent association and an children
# association. This act assumes that requires that you have a foreign key column, which by default is called parent_id.
#