Add new action in rails controller

Thanks for your reply.

I need to create two new exports:

  1. users with membership groups
  2. categories with related groups

I would like to add these two exports inside the ExportCsvController without creating new controller for every export.
Yes, the data explorer could solve the problem but the client for whom I am building the forum is not technical so exporting to CSV is the only way to show him the data.

The plugin is not adding a new method for an existing rails controller but it is creating a new controller for the data explorer logic.