base_controller.rb

class Drive::BaseController < ApplicationController
  #...
  
    def update
    authorize! :update, object

    if object_strong_params[:name] # indicates that the desired action is to rename the object
      desired_action = 'rename'
      object_plain_params[:name] = case controller_name
        when 'files' then object_strong_params[:name] + '.' + object.name.split('.').last
        else object_strong_params[:name]
      end
    else
      desired_action = 'move'
    end

    object.update!(object_strong_params)
    render_js_template("drive/update_#{desired_action}")
  end
  
  # ...
end