Devise Override code

confirmations_controller.rb

#Confirmations Controller located in controllers/riders
class Riders::ConfirmationsController < Devise::ConfirmationsController
  skip_before_filter :require_no_authentication
  skip_before_filter :authenticate_user!
  # PATCH /riders/confirmation
  def update
    with_unconfirmed_confirmable do
      if @confirmable.has_no_password?
        @confirmable.attempt_set_password(params[:rider])
        if @confirmable.valid?
          do_confirm
        else
          do_show
          @confirmable.errors.clear
        end
      else
        self.class.add_error_on(self, :email, :password_allready_set)
      end
    end

    if !@confirmable.errors.empty?
      render "riders/confirmations/show"
    end
  end

  # GET /riders/confirmation?confirmation_token=abcdef
  def show
    with_unconfirmed_confirmable do
      if @confirmable.has_no_password?
        do_show
      else
        do_confirm
      end
    end
    if !@confirmable.errors.empty?
      self.resource = @confirmable
      render 'riders/confirmations/new' #Change this if you don't have the views on default path
    end
  end

  protected

  def with_unconfirmed_confirmable
    original_token = params[:confirmation_token]
    @confirmation_token = Devise.token_generator.digest(User, :confirmation_token, original_token)
    @confirmable = Rider.find_or_initialize_with_error_by(:confirmation_token, @confirmation_token)
    if !@confirmable.new_record?
      @confirmable.only_if_unconfirmed {yield}
    end
  end

  def do_show
    @confirmation_token = params[:confirmation_token]
    @requires_password = true
    self.resource = @confirmable
    render "riders/confirmations/show" #Change this if you don't have the views on default path
  end

  def do_confirm
    @confirmable.confirm!
    set_flash_message :notice, :confirmed
    sign_in_and_redirect(resource_name, @confirmable)
  end
  

end

routes.rb

  #The devise code in my routes.rb file
  devise_for :riders, :controllers => {:confirmations => 'riders/confirmations'}

  devise_scope :rider do
    patch '/riders/confirmation' => 'riders/confirmations#update', :via => :patch, :as => :update_rider_confirmation
  end

show.html.slim

#My riders/confirmations/show template.
= simple_form_for resource, :as => resource_name, :url => update_rider_confirmation_path, :html => {:method => 'patch'}, :id => 'activation-form' do |f|
   = devise_error_messages!

   - if @requires_password
      = f.input :password, as: :password, label: 'Choose a Password:'
      = f.input :password_confirmation,as: :password, label: 'Password Confirmation:'
      = hidden_field_tag(:confirmation_token, @confirmation_token)

   = f.submit "Activate"