如何将ID传递给控制器​​中的动作-Ruby on Rails

Question

I am creating reports with the axlsx gem and I need to pass the id of the event that I select to generate its report, but I do not know how to get that id in the action of my controller that I created.

I am created this table where I must obtain the id that I want to send to the action:

My table

This is the code of my table, Here I try to pass the id, but I do not know how to get it in the controller:

def data
    events.map do |event|
      [
          event.name,
          (
              link_to(
                  raw("<button id='button' class='btn btn-default'><i class='fa fa-file-text' style='cursor: pointer;'></i></button>"),
                  assistants_report_admin_report_assistants_by_events_path(event.id, format: :xlsx)
              )
          )
      ]
    end
  end

The action on my controller:

def assistants_report
    @event_report = Event.where(id: "I need the id here!")
    respond_to do |format|
      format.xlsx {render xlsx: 'report_all_assistants', :filename => "aa.xlsx", layout: false, disposition: "attachment"}
    end
  end

routes.rb:

resources :report_assistants_by_events do
      collection do
        get "assistants_report"
      end
    end

Answer 1

You need to use member instead of collection in your routes.rb , then in your controller, you can access id by params[:id] .

You also need to replace assistants_report_admin_report_assistants_by_events_path with your new path after changing from collection to member .