# \- 2.3.2 uninitialized constant ApplicationController

**URL:** <https://www.ruby-forum.com/t/2-3-2-uninitialized-constant-applicationcontroller/163518>\
**Category:** Rails\
**Created:** [March 21, 2009, 11:07am UTC](https://www.ruby-forum.com/t/2-3-2-uninitialized-constant-applicationcontroller/163518 "2009-03-21T11:07:14Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![casper\_the\_ghost](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/c/58956e/32.png) [@casper\_the\_ghost](https://www.ruby-forum.com/u/casper_the_ghost)\
**Post date:** [March 21, 2009, 11:07am UTC](https://www.ruby-forum.com/t/2-3-2-uninitialized-constant-applicationcontroller/163518/1 "2009-03-21T11:07:14Z")

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Hi,  
I just migrated from rails 2.2.2 to 2.3.2  
The rails app was running fine until i migrated  
I checked for the application.rb in the controller folder and its  
there  
Any suggestions, why this is happening???

Regards,  
Vimal Das

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<div class="post-metadata">

**Author:** ![casper\_the\_ghost](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/c/58956e/32.png) [@casper\_the\_ghost](https://www.ruby-forum.com/u/casper_the_ghost)\
**Post date:** [March 21, 2009, 11:14am UTC](https://www.ruby-forum.com/t/2-3-2-uninitialized-constant-applicationcontroller/163518/2 "2009-03-21T11:14:51Z")

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On Sat, Mar 21, 2009 at 11:06 AM, vimal [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid)  
wrote:

> Hi,  
> Â I just migrated from rails 2.2.2 to 2.3.2  
> Â The rails app was running fine until i migrated  
> Â I checked for the application.rb in the controller folder and its  
> there  
> Â Any suggestions, why this is happening???

In 2.3 that’s application\_controller.rb. Just rename it or run:

rake rails:update:application\_controller

– fxn

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<div class="post-metadata">

**Author:** ![casper\_the\_ghost](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/c/58956e/32.png) [@casper\_the\_ghost](https://www.ruby-forum.com/u/casper_the_ghost)\
**Post date:** [March 21, 2009, 11:18am UTC](https://www.ruby-forum.com/t/2-3-2-uninitialized-constant-applicationcontroller/163518/3 "2009-03-21T11:18:22Z")

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Cool! Thanks Noria…  
Is the rails version 2.3.2 an edge version?

Regards,  
Vimal Das

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<div class="post-metadata">

**Author:** ![casper\_the\_ghost](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/c/58956e/32.png) [@casper\_the\_ghost](https://www.ruby-forum.com/u/casper_the_ghost)\
**Post date:** [March 21, 2009, 11:34am UTC](https://www.ruby-forum.com/t/2-3-2-uninitialized-constant-applicationcontroller/163518/4 "2009-03-21T11:34:46Z")

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On Sat, Mar 21, 2009 at 3:17 AM, vimal [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid)  
wrote:

> Cool! Thanks Noria…  
> Is the rails version 2.3.2 an edge version?
> 
> Regards,  
> Vimal Das

Vimal, Rails 2.3.2 is the most recent release.

-Conrad

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<div class="post-metadata">

**Author:** ![casper\_the\_ghost](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/c/58956e/32.png) [@casper\_the\_ghost](https://www.ruby-forum.com/u/casper_the_ghost)\
**Post date:** [March 21, 2009, 12:43pm UTC](https://www.ruby-forum.com/t/2-3-2-uninitialized-constant-applicationcontroller/163518/5 "2009-03-21T12:43:14Z")

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Thanks for the reply Conrad 🙂

Regards,  
Vimal Das

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<div class="post-metadata">

**Author:** ![casper\_the\_ghost](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/c/58956e/32.png) [@casper\_the\_ghost](https://www.ruby-forum.com/u/casper_the_ghost)\
**Post date:** [July 17, 2009, 3:29am UTC](https://www.ruby-forum.com/t/2-3-2-uninitialized-constant-applicationcontroller/163518/6 "2009-07-17T03:29:07Z")

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Thanks Noria.

I am a beginner and these minor issues are taking too much of my time;  
didn’t expect this from ROR.