How can I get access to this?
The value of the "_v_" attribute is *the* resource manager
registered with the transaction.
Ups... of course! I've made mistake - sorry.
My error was about self.db attribute in
'_v_database_connection' not about '_v_database_connection'
attribute itself. During abort() of this resource manager
self.db was None so self.db.rollback() failed. I'll check
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