RailsNote知识点

befor_action 方法

Append a callback before actions. See #_insert_callbacks for parameter details.

在events_controller.rb上方新增

1	before_action :method_name, :only => [ :show, :edit, :update, :destroy]

在 private下方

private
def 
	<-内容->
end

1	gem 'pry-rails', :group => :development

flash_now 可替代flash ,在当前页面显示flash message

ActiveModel::Errors 方法

ActiveModel::Errors provides some nice helper methods for working with validation errors that you can use in your views to display the errors to the user.

partials的命名必须使用_开头，例如_form而不是form