# Error in production only: \`method\_missing': undefined method \`has\_attachment' for #\\ **Category:** Rails\ **Created:** [June 7, 2009, 10:07pm UTC](https://www.ruby-forum.com/t/error-in-production-only-method-missing-undefined-method-has-attachment-for-class-0xb72b6cb/169727 "2009-06-07T22:07:34Z")\ **Posts on this page:** 7\ **Page:** 1
**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:** [June 7, 2009, 10:07pm UTC](https://www.ruby-forum.com/t/error-in-production-only-method-missing-undefined-method-has-attachment-for-class-0xb72b6cb/169727/1 "2009-06-07T22:07:34Z")
Hello guys, I’m having a problem with running an application in production. The error I’m getting is as follows: /home/www/bandera/releases/20090607191259/vendor/rails/activerecord/ lib/active\_record/base.rb:1964:in `method_missing': undefined method`has\_attachment’ for #Class:0xb72b6cb0 (NoMethodError) from /home/www/bandera/releases/20090607191259/app/models/document.rb: 8 from /usr/local/lib/ruby/site\_ruby/1.8/rubygems/custom\_require.rb: 31:in `gem_original_require' from /usr/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb: 31:in`require’ from /home/www/bandera/releases/20090607191259/vendor/rails/ activesupport/lib/active\_support/dependencies.rb:158:in `require' from /home/www/bandera/releases/20090607191259/vendor/rails/ activesupport/lib/active_support/dependencies.rb:265:in`require\_or\_load’ from /home/www/bandera/releases/20090607191259/vendor/rails/ activesupport/lib/active\_support/dependencies.rb:224:in `depend_on' from /home/www/bandera/releases/20090607191259/vendor/rails/ activesupport/lib/active_support/dependencies.rb:136:in`require\_dependency’ from ./script/…/config/…/vendor/rails/railties/lib/initializer.rb: 393:in `load_application_classes' ... 13 levels... from /home/www/bandera/releases/20090607191259/vendor/rails/railties/ lib/commands/server.rb:84 from /usr/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb: 31:in`gem\_original\_require’ from /usr/local/lib/ruby/site\_ruby/1.8/rubygems/custom\_require.rb: 31:in `require’ from ./script/server:3 This error occurs when I run ‘./script/server -e production’. If I run ‘./script/server’ immediately afterwards, the site runs fine without issue. I can’t see for the life of me what could be causing this problem and would appreciate any help! Regards, Alastair ---
**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:** [June 7, 2009, 10:08pm UTC](https://www.ruby-forum.com/t/error-in-production-only-method-missing-undefined-method-has-attachment-for-class-0xb72b6cb/169727/2 "2009-06-07T22:08:46Z")
On Jun 7, 8:18 pm, Alastair [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > Hello guys, > > I’m having a problem with running an application in production. The > error I’m getting is as follows: Random guess: is there is a line at the bottom of environment.rb that requires whatever it is that provides the has\_attachment method? Fred ---
**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:** [June 7, 2009, 10:36pm UTC](https://www.ruby-forum.com/t/error-in-production-only-method-missing-undefined-method-has-attachment-for-class-0xb72b6cb/169727/3 "2009-06-07T22:36:56Z")
On Jun 7, 9:08 pm, Frederick C. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > On Jun 7, 8:18 pm, Alastair [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > > > Hello guys, > > > I’m having a problem with running an application in production. The > > error I’m getting is as follows: > > Random guess: is there is a line at the bottom of environment.rb that > requires whatever it is that provides the has\_attachment method? Hi Fred, Thanks for your reply! As regards to the line in environment.rb, there isn’t. The has\_attachment, in this case, is the attachment\_fu plugin. It works fine on my local machine in both development and production modes. It works on the remote server in development mode (with ./script/server) but is literally just failing in production mode on the remote server with ./script/server -e production. I completely fail to see what could be causing this. Now copying the development.rb file over production.rb on the remote server allows the application to run in production mode so obviously there’s something in the production.rb environment file that is causing this error. Alastair ---
**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:** [June 7, 2009, 11:06pm UTC](https://www.ruby-forum.com/t/error-in-production-only-method-missing-undefined-method-has-attachment-for-class-0xb72b6cb/169727/4 "2009-06-07T23:06:46Z")
> In lieu of any better suggestions you could change it back to > production.rb one line at a time till you find the one causing the > problem. I’ve been trying that also, without much success so far. I’ll keep at it though! this is possibly the most bizarre thing ever. I’m wondering if I’m missing a gem somewhere so am updating the remote server with all gems installed on my development machine. ---
**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:** [June 7, 2009, 11:02pm UTC](https://www.ruby-forum.com/t/error-in-production-only-method-missing-undefined-method-has-attachment-for-class-0xb72b6cb/169727/5 "2009-06-07T23:02:40Z")
2009/6/7 Alastair [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid): > > > error I’m getting is as follows: > > > has\_attachment, in this case, is the attachment\_fu plugin. It works > > > fine on my local machine in both development and production modes. It > > > works on the remote server in development mode (with ./script/server) > > > but is literally just failing in production mode on the remote server > > > with ./script/server -e production. I completely fail to see what > > > could be causing this. Now copying the development.rb file over > > > production.rb on the remote server allows the application to run in > > > production mode so obviously there’s something in the production.rb > > > environment file that is causing this error. In lieu of any better suggestions you could change it back to production.rb one line at a time till you find the one causing the problem. Colin ---
**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:** [June 7, 2009, 11:16pm UTC](https://www.ruby-forum.com/t/error-in-production-only-method-missing-undefined-method-has-attachment-for-class-0xb72b6cb/169727/6 "2009-06-07T23:16:10Z")
On Jun 7, 10:01 pm, Alastair [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > > In lieu of any better suggestions you could change it back to > > production.rb one line at a time till you find the one causing the > > problem. > In lieu of any better suggestions you could change it back to > production.rb one line at a time till you find the one causing the > problem. I just tried removing any references to has\_attachment from my models and ran ./script/server -e production again. That cleared those errors but now I’m getting a new error of: /usr/local/lib/ruby/gems/1.8/gems/activesupport-2.3.2/lib/ active\_support/dependencies.rb:105:in `const\_missing’: uninitialized constant User::Authentication (NameError) I’m beginning to wonder if there’s an issue with my rails app, in production mode, not being able to see any plugins. Again, I can’t imagine why this would be occurring but it looks to be a possibility. Alastair ---
**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:** [June 7, 2009, 11:29pm UTC](https://www.ruby-forum.com/t/error-in-production-only-method-missing-undefined-method-has-attachment-for-class-0xb72b6cb/169727/7 "2009-06-07T23:29:03Z")
Ok, Turns out when I comment out any references to attachment\_fu and restful\_authentication in my models, I can run the site in production mode. Obviously this doesn’t help as I need both those plugins working 🙂