Say you have a table named "record" with a name and a description field and 
you want to revert to the version with record_archive ID given in 
request.args(0)


version = db.record_archive[request.args(0)]
current = db.record[version.current_record]
current.update_record(name=version.name, description=version.description)



-- 
Resources:
- http://web2py.com
- http://web2py.com/book (Documentation)
- http://github.com/web2py/web2py (Source code)
- https://code.google.com/p/web2py/issues/list (Report Issues)
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