positions_controller.rb

before_filter :find_position, only: [:show, :destroy, :edit]

  def destroy
    if @position.destroy
      flash[:success] = t('labels.success')
    else
      flash[:error] = t('labels.error')
    end
    redirect_to positions_path
  end
  
  def position_params
    params.require(:position).permit(:id)
  end
  
  def find_position
    @position = Position.find(position_params)
  end