# How to create and use RoR module? **URL:** \ **Category:** Rails\ **Created:** [August 8, 2007, 9:00am UTC](https://www.ruby-forum.com/t/how-to-create-and-use-ror-module/111526 "2007-08-08T09:00:25Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![makenai](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/8797f3/32.png) [@makenai](https://www.ruby-forum.com/u/makenai)\ **Post date:** [August 8, 2007, 9:00am UTC](https://www.ruby-forum.com/t/how-to-create-and-use-ror-module/111526/1 "2007-08-08T09:00:25Z")
Cross-posting from comp.lang.ruby Hi, I am quite new to ruby and ruby on rails. I am trying to user helper module in my controller but fail ☹ I added languages\_helper.rb file to helpers directory in my RoR app. The file looks like this: module LanguagesHelper def LanguagesHelper.sort\_to\_first(langs, lang) …my secret method here… end end Then I want to use it in LanguagesController. I put require “languages\_helper” right in the beginning of the class body, and then in one of controller’s methods I try to do ordered\_langs = LanguagesHelper.sort\_to\_first(all\_langs, lang) When while browsing I come to this place in my browser, there is a message: undefined method `sort\_to\_first’ for LanguagesHelper:Module What is wrong? Best regards Pawel S. ---
**Author:** ![makenai](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/8797f3/32.png) [@makenai](https://www.ruby-forum.com/u/makenai)\ **Post date:** [August 8, 2007, 9:26am UTC](https://www.ruby-forum.com/t/how-to-create-and-use-ror-module/111526/2 "2007-08-08T09:26:33Z")
> require “languages\_helper” > ordered\_langs = LanguagesHelper.sort\_to\_first(all\_langs, lang) > undefined method `sort\_to\_first’ for LanguagesHelper:Module i believe the error appears because the LanguageHelper isn’t included correctly and so the method isn’t actually embedded in the controller; did you add ‘include LanguagesHelper’ ? (this mixes it in) also, you can put in modules in the RAILS\_ROOT/lib folder and require them just as easily (it doesn’t have to be a ‘helper’) ---
**Author:** ![makenai](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/8797f3/32.png) [@makenai](https://www.ruby-forum.com/u/makenai)\ **Post date:** [August 8, 2007, 9:38am UTC](https://www.ruby-forum.com/t/how-to-create-and-use-ror-module/111526/3 "2007-08-08T09:38:28Z")
> i believe the error appears because the LanguageHelper isn’t included > correctly and so the method isn’t actually embedded in the controller; I think it is included correctly, because in error message there is undefined method, but there is nothing like “unknown module LanguagesHelper”. I think module is available, but method is not. (But of course I can be wrong). > did you add > > ‘include LanguagesHelper’ ? (this mixes it in) I tried this too, but it didn’t help ☹ > also, you can put in modules in the RAILS\_ROOT/lib folder and require > them just as easily (it doesn’t have to be a ‘helper’) I prefer to have it in helper, just for this app. Thanks anyway Regards PaweÅ‚ Stawicki ---
**Author:** ![makenai](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/8797f3/32.png) [@makenai](https://www.ruby-forum.com/u/makenai)\ **Post date:** [August 8, 2007, 10:41am UTC](https://www.ruby-forum.com/t/how-to-create-and-use-ror-module/111526/4 "2007-08-08T10:41:36Z")
I tried this too ☹ ---
**Author:** ![makenai](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/8797f3/32.png) [@makenai](https://www.ruby-forum.com/u/makenai)\ **Post date:** [August 8, 2007, 10:48am UTC](https://www.ruby-forum.com/t/how-to-create-and-use-ror-module/111526/5 "2007-08-08T10:48:18Z")
Shai R. wrote: > > > i believe the error appears because the LanguageHelper isn’t included > > > correctly and so the method isn’t actually embedded in the controller; > > > > I think it is included correctly, because in error message there is > > undefined method, but there is nothing like “unknown module > > LanguagesHelper”. I think module is available, but method is not. (But > > of course I can be wrong). > > …i’m not sure about this, but if you change > > module LanguagesHelper > def LanguagesHelper.sort\_to\_first(langs, lang) > …my secret method here… > end > end > > to > > module LanguagesHelper > def sort\_to\_first(langs, lang) > …my secret method here… > end > end > and then in the controller, just put the method name (without prepending > it to LanguageHelper) like > > ordered\_langs = sort\_to\_first(all\_langs, lang) > > i’ve had something similar, and i believe this worked for me. > what is the outcome if you use the above? Hi Pawel S., U put include instead of require it will work include LanguageHelper ---
**Author:** ![makenai](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/8797f3/32.png) [@makenai](https://www.ruby-forum.com/u/makenai)\ **Post date:** [August 8, 2007, 10:01am UTC](https://www.ruby-forum.com/t/how-to-create-and-use-ror-module/111526/6 "2007-08-08T10:01:12Z")
> > i believe the error appears because the LanguageHelper isn’t included > > correctly and so the method isn’t actually embedded in the controller; > > I think it is included correctly, because in error message there is > undefined method, but there is nothing like “unknown module > LanguagesHelper”. I think module is available, but method is not. (But > of course I can be wrong). …i’m not sure about this, but if you change module LanguagesHelper def LanguagesHelper.sort\_to\_first(langs, lang) …my secret method here… end end to module LanguagesHelper def sort\_to\_first(langs, lang) …my secret method here… end end and then in the controller, just put the method name (without prepending it to LanguageHelper) like ordered\_langs = sort\_to\_first(all\_langs, lang) i’ve had something similar, and i believe this worked for me. what is the outcome if you use the above?