如何获得对象的名称?

I have different objects, for example Article and Medium. When I use a helper, I would like to determine the name of the object (for example Articleor Medium). How can I do that?

我有不同的对象，例如文章和媒介。当我使用助手时，我想确定对象的名称(例如Articleor Medium)。我怎么做呢?

2 个解决方案

#1

See http://ruby-doc.org/core-1.9.3/Object.html#method-i-class

看到http://ruby-doc.org/core-1.9.3/Object.html method-i-class

a = Article.new
a.class
# => Article
a.class.to_s
# => "Article"

also take a look at is_a? and respond_to?. It's generally better to use duck typing with respond_to? than the name of a class (generally).

看一下is_a?respond_to ?。在respond_to中使用duck typing通常会更好一些。而不是类的名称(通常)。

#2

-2

It is impossible. Constants and variables refer to the object. There is no way to get the name of it.

这是不可能的。常量和变量指的是对象。没有办法知道它的名字。

Article = Object.new

See that the value Article does not include information about its name:

请注意，value文章不包含关于其名称的信息:

Article
# => <#Object...>

#1