了解route.rb文件中符号的用法 [英] Understanding usage of symbols in routes.rb files

问题描述

我是红宝石的新手，并且正在从事一个项目。在routes.rb文件中，有一些我不理解的语法。更精确地讲，我可以在此文件中找到：

I am newbie to ruby, and I am working on a project. In the routes.rb file, and there is some syntax I don't understand. More precisely, I can find in this file alternatively :

get :account #with a symbol
get 'notes'  #with no symbol

有什么区别？我想：account 应该在路由过程中的其他地方定义，对吗？

What is the difference ? I suppose :account should be defined elsewhere, sooner in the routing process, right ?

推荐答案

get：account （使用符号）和 get'account'（使用字符串）正是在这种情况下也是一样。在您的路线中，Rails会将符号转换为字符串。

get :account (using symbol) and get 'account' (using string) are exactly the same in this context. In your route the symbol will be translated to a string by Rails.

这只是一种编码样式，我个人使用这些符号是因为我喜欢在IDE中查看颜色，它可以帮助我更快地阅读代码。

It's just a coding style, I personally use the symbols because I like to see the colors in my IDE, it helps me reading my code faster.

回答另一个问题：不需要在任何地方定义符号，这些符号不是方法或变量。您可以将它们视为一个常量，值等于它们的名称。

And to answer your other question: no you don't need to define symbols anywhere, those are not a method or a variable. You can see them as a constant with a value equal to their names.

编辑：如果仍然令人困惑，您可以阅读这份关于Ruby中符号的完整指南： http://www.troubleshooters.com/codecorn/ruby/symbols.htm

If it's still confusing you can read this pretty complete guide on symbols in Ruby: http://www.troubleshooters.com/codecorn/ruby/symbols.htm

这篇关于了解route.rb文件中符号的用法的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！