Selecting an option (Concept) from drop-down and storing it in DB

Hello, I am trying to fetch the selected option from a drop-down list and store it in the DB. This is my view -

Choose option <% routes.each { route -> %> ${ route.getDisplayString() } <% } %>

where routes is a list of Concepts.

I want to fetch the selected route name (Concept name) in the Controller and store it in the DB.

@RequestParam(value = “drugRoute”, required = false) String drugRoute, drugorders.setRoute(drugRoute);

Could anyone please provide any help with this. Thank you!