# Nested class?

**URL:** <https://www.ruby-forum.com/t/nested-class/150784>\
**Category:** Rails\
**Created:** [October 13, 2008, 9:35am UTC](https://www.ruby-forum.com/t/nested-class/150784 "2008-10-13T09:35:44Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![rubyernewbie](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/r/9dc877/32.png) [@rubyernewbie](https://www.ruby-forum.com/u/rubyernewbie)\
**Post date:** [October 13, 2008, 9:35am UTC](https://www.ruby-forum.com/t/nested-class/150784/1 "2008-10-13T09:35:44Z")

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require ‘observer’  
require ‘set’

class Content \< ActiveRecord::Base  
include Observable

#somecode here that I hidden

class ContentTextHelpers  
include ActionView::Helpers::TagHelper  
include ActionView::Helpers::SanitizeHelper  
include ActionView::Helpers::TextHelper  
end

+++++++++++++++++++++++

there’s a Content class nested ContentTextHelers class. I’m a litte  
confused about that.  
what’s nested class work for?  
is only Ruby have nested class? like C++, is inherit class.

---

<div class="post-metadata">

**Author:** ![rubyernewbie](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/r/9dc877/32.png) [@rubyernewbie](https://www.ruby-forum.com/u/rubyernewbie)\
**Post date:** [October 14, 2008, 3:11pm UTC](https://www.ruby-forum.com/t/nested-class/150784/2 "2008-10-14T15:11:13Z")

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Zhenning G. wrote:

> require ‘observer’  
> require ‘set’
> 
> class Content \< ActiveRecord::Base  
> include Observable
> 
> #somecode here that I hidden
> 
> class ContentTextHelpers  
> include ActionView::Helpers::TagHelper  
> include ActionView::Helpers::SanitizeHelper  
> include ActionView::Helpers::TextHelper  
> end
> 
> +++++++++++++++++++++++
> 
> there’s a Content class nested ContentTextHelers class. I’m a litte  
> confused about that.  
> what’s nested class work for?  
> is only Ruby have nested class? like C++, is inherit class.

ContentTextHelpers is the single class for Content class scope .  
generally we can all classes are nested class of Object