Ruby之 model.new_record? - parsent?
2013-09-23 16:49
211 查看
判读对象是否保存/存有数据 http://api.rubyonrails.org/
判读对象是否为空 parsent?
玩转 Controller
@model.new_record?
判读对象是否为空 parsent?
2.0.0p247 :001 > 'a'.present? => true 2.0.0p247 :002 > 1.present? => true 2.0.0p247 :003 > nil.present? => false 2.0.0p247 :004 >
玩转 Controller
before_filter :authenticate_user!,
:except => [:show, :questions, :users_rank]
before_filter :pre_load
layout Proc.new { |controller|
case controller.action_name
when 'show', 'users_rank', 'questions', 'notes', 'chs'
return 'course_show'
else
return 'application'
end
}
内容来自用户分享和网络整理，不保证内容的准确性，如有侵权内容，可联系管理员处理 
相关文章推荐
- ruby /.rvm/gems/ruby-2.1.3/gems/activerecord-4.1.6/lib/active_record/dynamic_matchers.rb:26:in `meth
- The Ruby On Rials Gudie -- Active Record Migrations
- The Ruby On Rials Gudie -- Active Record Associations
- ruby reading record
- http://api.rubyonrails.org/classes/ActiveRecord/Callbacks.html
- How to use ActiveRecord in a ruby script outside Rails?
- Ruby: ActiveRecord Realation(转载收藏)
- Ruby开发：Sinatra+ActiveRecord+MySQL
- Concurrency and Database Connections in Ruby with ActiveRecord
- The Ruby On Rials Gudie -- Active Record Callbacks
- 对RUBY + ACTIVERECORD +MYSQL 的一点郁闷解决思路
- 【Ruby】Ruby的model学习——Active Record Associations
- Ruby On Rails--Active Record Associations（关联关系）
- Ruby On Rails--Active Record Migrations（数据库迁移）
- Ruby On Rails--Active Record Validations（校验）
- Ruby: Calling Ruby's ActiveRecord from Java Using the Bean Scripting Framework
- The Ruby On Rials Gudie -- Active Record Query Interface
- Ruby on Rails，从这里开始
- ruby遍历map
- Ruby on Rails，创建最简单的视图/控制器单元Hello World