# NameError: uninitialized constant Dispatch

**URL:** <https://www.ruby-forum.com/t/nameerror-uninitialized-constant-dispatch/195299>\
**Category:** Rails\
**Created:** [September 21, 2010, 12:13pm UTC](https://www.ruby-forum.com/t/nameerror-uninitialized-constant-dispatch/195299 "2010-09-21T12:13:07Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![swengineer](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/97f17d/32.png) [@swengineer](https://www.ruby-forum.com/u/swengineer)\
**Post date:** [September 21, 2010, 12:13pm UTC](https://www.ruby-forum.com/t/nameerror-uninitialized-constant-dispatch/195299/1 "2010-09-21T12:13:07Z")

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In the “Rails Way” book, following an example, I came to a point where I  
had to run:

Dispatch.dispatch

But, I get the following:

irb(main):003:0\> Dispatch.dispatch  
NameError: uninitialized constant Dispatch  
from (irb):3

I want to mention that I’m using “Rails 3.0.0”, and the book seems to  
use an older version of Rails, is that the issue?

What is the command that I should run in this case?

Thanks.

---

<div class="post-metadata">

**Author:** ![swengineer](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/97f17d/32.png) [@swengineer](https://www.ruby-forum.com/u/swengineer)\
**Post date:** [September 21, 2010, 12:18pm UTC](https://www.ruby-forum.com/t/nameerror-uninitialized-constant-dispatch/195299/2 "2010-09-21T12:18:52Z")

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It is:

Dispatcher.dispatch

But, although that, I’m getting:

irb(main):003:0\> Dispatcher.dispatch  
NameError: uninitialized constant Dispatcher  
from (irb):3