Rails: Overriding ActiveRecord association method

Question

Is there a way to override one of the methods provided by an ActiveRecord association?

Say for example I have the following typical polymorphic has_many :through ass

Answer 1

Rails guides documents about overriding the added methods directly.

OP's issue with overriding << probably is the only exception to this, for which follow the top answer. But it wouldn't work for has_one's = assignment method or getter methods.