How to conditionally delegate Active Records in Ruby

Is it possible to delegate a function or series of functions to one of multiple other objects based on conditional logic?

Ex:

class Item
    has_one :thing
    has_one :other_thing

    delegate :foo,
             :bar
             to: :[thing or other_thing]
end

In this case, I would want the actions foo and bar to either be delegated to the thing, or the other thing based on some conditional logic.

Possibly related: Active Record with Delegate and conditions