Duplication for method calls vs before_filters

filters.rb

# Filters
# Action name is duplicated in filter blacklist or whitelist
class PoniesController < ApplicationController
  before_filter :find_pony, except: [:index]
  before_filter :authorize_rider, only: [:edit, :update, :destroy]

  def show
  end

  def index
    @ponies = Pony.all
  end

  def edit
  end

  def update
    if @pony.save
      redirect_to @pony
    else
      render 'edit'
    end
  end

  def destroy
    @pony.destroy
    redirect_to @poney
  end

  private

  def authorize_rider
    find_pony
    unless @poney.has_rider?(current_user)
      redirect_to root_url, error: 'Get off my pony'
    end
  end

  def find_pony
    Pony.find(params[:id])
  end
end

method_calls.rb

# Method calls
# Method name is duplicated in each action
class PoniesController < ApplicationController
  def show
    @pony = find_pony
  end

  def index
    @ponies = Pony.all
  end

  def edit
    authorize_rider
    @pony = find_pony
  end

  def update
    authorize_rider
    @pony = find_pony
    if @pony.save
      redirect_to @pony
    else
      render 'edit'
    end
  end

  def destroy
    authorize_rider
    @pony = find_pony
    @pony.destroy
    redirect_to @pony
  end

  private

  def authorize_rider
    pony = find_pony
    unless pony.has_rider?(current_user)
      redirect_to root_url, error: 'Get off my pony'
    end
  end

  def find_pony
    Pony.find(params[:id])
  end
end