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-rw-r--r--activerecord/lib/active_record/migration.rb5
1 files changed, 3 insertions, 2 deletions
diff --git a/activerecord/lib/active_record/migration.rb b/activerecord/lib/active_record/migration.rb
index a7be3539d5..467d955a49 100644
--- a/activerecord/lib/active_record/migration.rb
+++ b/activerecord/lib/active_record/migration.rb
@@ -1,3 +1,5 @@
+require 'active_support/core_ext/object/metaclass'
+
module ActiveRecord
class IrreversibleMigration < ActiveRecordError#:nodoc:
end
@@ -300,8 +302,7 @@ module ActiveRecord
case sym
when :up, :down
- klass = (class << self; self; end)
- klass.send(:alias_method_chain, sym, "benchmarks")
+ metaclass.send(:alias_method_chain, sym, "benchmarks")
end
ensure
@ignore_new_methods = false