remove_target!

# File activerecord/lib/active_record/associations/has_one_association.rb, line 76
        def remove_target!(method)
          case method
            when :delete
              target.delete
            when :destroy
              target.destroy
            else
              nullify_owner_attributes(target)

              if target.persisted? && owner.persisted? && !target.save
                set_owner_attributes(target)
                raise RecordNotSaved, "Failed to remove the existing associated #{reflection.name}. " +
                                      "The record failed to save after its foreign key was set to nil."
              end
          end
        end