Code shared from the Rust Playground

playground.rs

trait Key {
    fn key() -> &'static str;
}

trait Model where Self: Key {
    fn get() {
        println!("Getting {}", Self::key());
    }
}

struct Object { }

impl Key for Object {
    fn key() -> &'static str {
        "object"
    }
}

impl Model for Object { }

struct Thing { }

impl Key for Thing {
    fn key() -> &'static str {
        "thing"
    }
}

impl Model for Thing { }

fn main() {
    Object::get();
    Thing::get();
}