How to implement scss generation in helper?

Question

Ruby on Rails

There is a table with records. One entry is a set of css options.
Further there is a scss code into which these values ​​are inserted.
You need to generate scss (sass) code in the helper and send it as simple css.
How to do it?
PS Why can't I write css right away? It's simple - you need sass functions.

Answer 1

How to write a Rails helper that will return a string processed by a third party library?

require "sass"
def foo(sass)
  Sass.compile sass
end

Only one question: why?