MySQL set data type

I have a legacy database table I'm working with in Rails and one of
the fields is the MySQL set field type, like so:

`userRoles` set('CEO','President','Vice President','Sales Manager')

When I access the table with Active Record I only get an integer value
for this field, which I think is the raw format MySQL uses to store
the set values. Does anyone know how to retrieve this field type in
its human readable format, using Active Record?