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-rw-r--r--activerecord/lib/active_record/errors.rb10
1 files changed, 10 insertions, 0 deletions
diff --git a/activerecord/lib/active_record/errors.rb b/activerecord/lib/active_record/errors.rb
index b8b8684cff..38e4fbec8b 100644
--- a/activerecord/lib/active_record/errors.rb
+++ b/activerecord/lib/active_record/errors.rb
@@ -285,6 +285,16 @@ module ActiveRecord
class TransactionIsolationError < ActiveRecordError
end
+ # TransactionSerializationError will be raised when a transaction is rolled
+ # back by the database due to a serialization failure or a deadlock.
+ #
+ # See the following:
+ #
+ # * http://www.postgresql.org/docs/current/static/transaction-iso.html
+ # * https://dev.mysql.com/doc/refman/5.7/en/error-messages-server.html#error_er_lock_deadlock
+ class TransactionSerializationError < ActiveRecordError
+ end
+
# IrreversibleOrderError is raised when a relation's order is too complex for
# +reverse_order+ to automatically reverse.
class IrreversibleOrderError < ActiveRecordError