class ActiveRecord::Associations::Builder::SingularAssociation

def self.define_accessors(model, reflection)
  super
  mixin = model.generated_association_methods
  name = reflection.name
  define_constructors(mixin, name) unless reflection.polymorphic?
  mixin.class_eval <<-CODE, __FILE__, __LINE__ + 1
    def reload_#{name}
      association(:#{name}).force_reload_reader
    end
  CODE
end