Why do you require isolation?

[tillvollmer]

In the init section it uses this
TransactionIsolation.apply_activerecord_patch

But there is no call of isolation() in the code.

Why is that needed?

[joevandyk]

I think Rails 4 supports specifying the transaction level.. maybe that could be used?

[nevinera]

That other gem does some exception rewriting, and this one depends on the ActiveRecord::TransactionIsolationConflict exception, rather than the collection of other exceptions it wraps:

transaction_retry/lib/transaction_retry/active_record/base.rb

Line 33 in 0cd0491

rescue *[::ActiveRecord::TransactionIsolationConflict, *retry_on]