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-rw-r--r--activerecord/test/cases/attribute_methods/read_test.rb8
1 files changed, 8 insertions, 0 deletions
diff --git a/activerecord/test/cases/attribute_methods/read_test.rb b/activerecord/test/cases/attribute_methods/read_test.rb
index 0df9ffc0c5..764305459d 100644
--- a/activerecord/test/cases/attribute_methods/read_test.rb
+++ b/activerecord/test/cases/attribute_methods/read_test.rb
@@ -1,5 +1,6 @@
require "cases/helper"
require 'active_support/core_ext/object/inclusion'
+require 'thread'
module ActiveRecord
module AttributeMethods
@@ -20,6 +21,13 @@ module ActiveRecord
include ActiveRecord::AttributeMethods
+ def self.define_attribute_methods
+ # Created in the inherited/included hook for "proper" ARs
+ @attribute_methods_mutex ||= Mutex.new
+
+ super
+ end
+
def self.column_names
%w{ one two three }
end