→ ‘twowaysql’ What TwoWaySQL is a Template Engine for SQL. With TwoWaySQL, you can bind variables to SQL or modify SQL conditionally and run and preview TwoWaySQL-style SQL by tools like pgAdmin3, since the SQL is still valid. see more docs Installing (sudo) gem install twowaysql The basics see docs Demonstration of usage simple case # given SQL string with TwoWaySQL comments sql = "SELECT * FROM