an experiment for open discussion, to eliminate duplicate controller logic

render_or_redirect.rb

# eliminate all the duplication

def render_or_redirect(_action, _path, &block)
  if block.call
    redirect_to _path, success: I18n.t('common.success')
  else
    flash.now[:alert] = I18n.t('common.error')
    render _action
  end
end

# examples

render_or_redirect(:edit, users_path) do
  @user.update_attributes(user_params)
end

render_or_redirect(:new, users_path) do
  @user.save
end