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-rw-r--r--activerecord/lib/active_record/migration.rb1
1 files changed, 1 insertions, 0 deletions
diff --git a/activerecord/lib/active_record/migration.rb b/activerecord/lib/active_record/migration.rb
index 9b93366906..90984b080b 100644
--- a/activerecord/lib/active_record/migration.rb
+++ b/activerecord/lib/active_record/migration.rb
@@ -92,6 +92,7 @@ module ActiveRecord
#
# def self.down
# # not much we can do to restore deleted data
+ # raise IrreversibleMigration
# end
# end
#