原理: Rails 通过 Active Record 来与数据库进行交互,这样,不必使用数据库的结构化查询语言(SQL), 就可以对创建、删除、修改模型. 新建model 命令: rails generate model <ModelName> <AttributeName> 其中,<ModelName>是模型的名字,<AttributeName>是该模型的属性的名称(
Ruby on Rails Tutorial - Learn Ruby on Rails with this comprehensive tutorial covering fundamentals, MVC architecture, and essential features for building web applications.
/usr/bin/rubyx=1unless x>2puts"x is less than 2"elseputs"x is greater than 2"end 用!!对对象做两次取反操作,把对象转换成布尔值。Ruby中nil是唯一一个布尔值为“假”的对象,其他所有Ruby对象都是“真”值,数字0也是。 >>nil=>false>>!0=> true >>"foobar".length>>"foobar".empty?>>"foo...
现在我们通过Rails的控制台(console)来验证user和microposts之间的关系,控制台是一个非常有用的工,他可以使我们和Rails程序之间进行交互。我们先从命令行输入“rails console”进入控制台,然后使用User.first从数据库检索出第一个user(将 结果赋值给变量first_user); $ rails console >> first_user = User.first =...
My former company (CD Baby) was one of the first to loudly switch to Ruby on Rails, and then even more loudly switch back to PHP (Google me to read about the drama). This book by Michael Hartl came so highly recommended that I had to try it, and the Ruby on Rails Tutorial is wh...
RailsTutorial-笔记4-Ruby基础 demo4 simple-app 2 (Rails背后的Ruby) 源码为demo3的demo4分支 布局文件 # app/views/layouts/application.html.erb <%= stylesheet_link_tag "application", media:"all","data-turbolinks-track" => true %> # 调用函数时可以省略括号...
在rails里面Post的请求一般用于创建数据(尽管HTTP也允许post去实现更新。) for example, the POST request sent when you submit a registration form creates a new user on the remote site. 比如,当你提交一个注册表单之后就会在服务器那边创建一个新的用户。
On August 15, Ruby on Rails released its version 6, making even more features available to developers The 13-year-old framework gives you a plethora of tools out of the box, which allows building complete applications in a very short time
Ruby on Rails 3 Tutorial: From Zero to DeployMichael Hartl
Rails程序的RESTful结构是这种重复结构最好的实现方式。的确,研究这种Users和Microposts资源早期的重复结构也是本章最初的动机。(我们将会明白写一个不是toy programe的健壮程序需要耗费相当多的精力、我将会在第11章再次见到microposts资源——其实我不想隔那么久。。。)。