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-rw-r--r--activerecord/lib/active_record/migration.rb3
1 files changed, 2 insertions, 1 deletions
diff --git a/activerecord/lib/active_record/migration.rb b/activerecord/lib/active_record/migration.rb
index aeeed24881..c059b2d18b 100644
--- a/activerecord/lib/active_record/migration.rb
+++ b/activerecord/lib/active_record/migration.rb
@@ -1,7 +1,8 @@
require 'active_support/core_ext/object/metaclass'
module ActiveRecord
- class IrreversibleMigration < ActiveRecordError#:nodoc:
+ # Exception that can be raised to stop migrations from going backwards.
+ class IrreversibleMigration < ActiveRecordError
end
class DuplicateMigrationVersionError < ActiveRecordError#:nodoc: