def self.fetch_by_tracking_code(tracking_code)
Domain.where(tracking_code: tracking_code).take
end
gives: (no default scopes)
"SELECT "domains".* FROM "domains" WHERE
"tracking_code"."tracking_code" = 'QwZLPnJuSklhucbBJYLjpUifipNSfEic' LIMIT 1):"