Rails helper and helper_method in Controller

helper_method

defined in rails/actionpack/lib/abstract_controller/helpers.rbDeclare a controller method as a helper. For example, the following

class ApplicationController < ActionController::Base      helper_method :current_user, :logged_in?      def current_user        @current_user ||= User.find_by_id(session[:user])      end      def logged_in?        current_user != nil      end    end

then in view

<% if logged_in? -%>Welcome, <%= current_user.name %><% end -%>

helper

The helper class method can take a series of helper module names, a block, or both.

Parameters *args – Module, Symbol, String, :all block – A block defining helper methods

原文地址：Rails helper and helper_method in Controller, 感谢原作者分享。愚者用肉体监视心灵，智者用心灵监视肉体

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