# Lower case namespace **URL:** \ **Category:** IronRuby\ **Created:** [May 6, 2010, 8:40am UTC](https://www.ruby-forum.com/t/lower-case-namespace/188124 "2010-05-06T08:40:09Z")\ **Posts on this page:** 12\ **Page:** 1
**Author:** ![maxer](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/e47774/32.png) [@maxer](https://www.ruby-forum.com/u/maxer)\ **Post date:** [May 6, 2010, 8:40am UTC](https://www.ruby-forum.com/t/lower-case-namespace/188124/1 "2010-05-06T08:40:09Z")
Hy all, I’m trying to use a 3rd party library into my app via IronRuby Unfortunately the root namespace of this library is lower case and I believe this cause some problem This is the sample code I wish to run require “devDept.EyeshotUltimate” include devDept::Geometry o = Point3D.Origin puts o.x puts o.y puts o.z but the second line throws the exception undefined method `devDept’ for main:Object (NoMethodError) I think I know why this append ([http://ironruby.net/Documentation/.NET/Names](http://ironruby.net/Documentation/.NET/Names) ) “CLR namespaces and interfaces must be capitalized as they are mapped onto Ruby modules” Since I can’t modify the 3rd party library is there a way to avoid this error ? Many thanks claudio ---
**Author:** ![maxer](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/e47774/32.png) [@maxer](https://www.ruby-forum.com/u/maxer)\ **Post date:** [May 6, 2010, 8:53am UTC](https://www.ruby-forum.com/t/lower-case-namespace/188124/2 "2010-05-06T08:53:02Z")
you could try with: Geometry = Object.const\_get(“devDept::Geometry”) include Geometry I haven’t tried if this actually works though * * * Met vriendelijke groeten - Best regards - Salutations Ivan Porto C. Web: [http://whiterabbitconsulting.eu](http://whiterabbitconsulting.eu) - [http://flanders.co.nz](http://flanders.co.nz) Twitter: [http://twitter.com/casualjim](http://twitter.com/casualjim) Author of IronRuby in Action ([http://manning.com/carrero](http://manning.com/carrero)) Microsoft IronRuby/C# MVP On Thu, May 6, 2010 at 8:38 AM, Claudio M. ---
**Author:** ![maxer](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/e47774/32.png) [@maxer](https://www.ruby-forum.com/u/maxer)\ **Post date:** [May 6, 2010, 8:57am UTC](https://www.ruby-forum.com/t/lower-case-namespace/188124/3 "2010-05-06T08:57:43Z")
I can think of a workaround (never checked it though) - create a C# assembly that adds a name alias to the assembly: using DevDept = devDept; and then require this assembly. ## Shay. Shay F. | Microsoft Visual C#/IronRuby MVP | Author of IronRuby Unleashed Blog: [http://IronShay.com](http://IronShay.com) | Twitter: [http://twitter.com/ironshay](http://twitter.com/ironshay) ---
**Author:** ![maxer](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/e47774/32.png) [@maxer](https://www.ruby-forum.com/u/maxer)\ **Post date:** [May 6, 2010, 9:24am UTC](https://www.ruby-forum.com/t/lower-case-namespace/188124/4 "2010-05-06T09:24:04Z")
Hi Ivan, thank you for you prompt reply Now my code is require “devDept.EyeshotUltimate” Geometry = Object.const\_get(“devDept::Geometry”) include Geometry o = Point3D.Origin puts o.x puts o.y puts o.z When I run it I get this error: C:\Users\cmaccari\Desktop\ironruby-1.0\bin\>ir devDept.rb devDept.rb:2:in `const_get':`devDept::Geometry’ is not allowed as a constant name (NameError) from devDept.rb:2 Any ideas ---
**Author:** ![maxer](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/e47774/32.png) [@maxer](https://www.ruby-forum.com/u/maxer)\ **Post date:** [May 6, 2010, 9:39am UTC](https://www.ruby-forum.com/t/lower-case-namespace/188124/5 "2010-05-06T09:39:17Z")
But this assembly has no types inside right ? ---
**Author:** ![maxer](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/e47774/32.png) [@maxer](https://www.ruby-forum.com/u/maxer)\ **Post date:** [May 6, 2010, 11:58am UTC](https://www.ruby-forum.com/t/lower-case-namespace/188124/6 "2010-05-06T11:58:01Z")
Right, no types, only an alias for the problematic namespace.I haven’t checked that though. Let us know if you find a solution. ## Shay. Shay F. | Microsoft Visual C#/IronRuby MVP | Author of IronRuby Unleashed Blog: [http://IronShay.com](http://IronShay.com) | Twitter: [http://twitter.com/ironshay](http://twitter.com/ironshay) On Thu, May 6, 2010 at 10:36 AM, Claudio M. ---
**Author:** ![maxer](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/e47774/32.png) [@maxer](https://www.ruby-forum.com/u/maxer)\ **Post date:** [May 6, 2010, 12:58pm UTC](https://www.ruby-forum.com/t/lower-case-namespace/188124/7 "2010-05-06T12:58:19Z")
you can use .NET reflection still the assembly is loaded but you can also interrogate it and get the types you need out and instantiate them that way. Not ideal but still worth a shot. The aliasing won’t work I guess because that works at an assembly level, but if it does it’s good to know 🙂 ## IronRuby doesn’t know extern alias which is what you’d need to use. Met vriendelijke groeten - Best regards - Salutations Ivan Porto C. Web: [http://whiterabbitconsulting.eu](http://whiterabbitconsulting.eu) - [http://flanders.co.nz](http://flanders.co.nz) Twitter: [http://twitter.com/casualjim](http://twitter.com/casualjim) Author of IronRuby in Action ([IronRuby in Action - Ivan Porto Carrero and Adam Burmister | Manning](http://manning.com/carrero)) Microsoft IronRuby/C# MVP On Thu, May 6, 2010 at 9:21 AM, Claudio M. ---
**Author:** ![maxer](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/e47774/32.png) [@maxer](https://www.ruby-forum.com/u/maxer)\ **Post date:** [May 6, 2010, 5:48pm UTC](https://www.ruby-forum.com/t/lower-case-namespace/188124/8 "2010-05-06T17:48:08Z")
The aliasing doesn’t work or I missed something ☹ ---
**Author:** ![maxer](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/e47774/32.png) [@maxer](https://www.ruby-forum.com/u/maxer)\ **Post date:** [May 6, 2010, 5:54pm UTC](https://www.ruby-forum.com/t/lower-case-namespace/188124/9 "2010-05-06T17:54:34Z")
Does anyone know if IronPython use the same convention? Will I have the same issue if I convert my ruby code to python ? Thks makka On Thu, May 6, 2010 at 5:46 PM, Claudio M. ---
**Author:** ![maxer](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/e47774/32.png) [@maxer](https://www.ruby-forum.com/u/maxer)\ **Post date:** [May 6, 2010, 6:33pm UTC](https://www.ruby-forum.com/t/lower-case-namespace/188124/10 "2010-05-06T18:33:48Z")
This is almost right. You just need to split the constant lookup into 2 parts and you should be good: require “devDept.EyeshotUltimate” Geometry = Object.const\_get(“devDept”)::Geometry include Geometry o = Point3D.Origin puts o.x puts o.y puts o.z Tomas From: [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) [[mailto:removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid)] On Behalf Of Claudio Maccari Sent: Thursday, May 06, 2010 12:22 AM To: [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) Subject: Re: [Ironruby-core] Lower case namespace Hi Ivan, thank you for you prompt reply Now my code is require “devDept.EyeshotUltimate” Geometry = Object.const\_get(“devDept::Geometry”) include Geometry o = Point3D.Origin puts o.x puts o.y puts o.z When I run it I get this error: C:\Users\cmaccari\Desktop\ironruby-1.0\bin\>ir devDept.rb devDept.rb:2:in `const_get': `devDept::Geometry’ is not allowed as a constant name (NameError) from devDept.rb:2 Any ideas On Thu, May 6, 2010 at 8:48 AM, Ivan Porto C. \<[removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid)[mailto:removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid)\> wrote: you could try with: Geometry = Object.const\_get(“devDept::Geometry”) include Geometry I haven’t tried if this actually works though * * * Met vriendelijke groeten - Best regards - Salutations Ivan Porto C. Web: [http://whiterabbitconsulting.eu](http://whiterabbitconsulting.eu) - [http://flanders.co.nz](http://flanders.co.nz) Twitter: [http://twitter.com/casualjim](http://twitter.com/casualjim) Author of IronRuby in Action ([IronRuby in Action - Ivan Porto Carrero and Adam Burmister | Manning](http://manning.com/carrero)) Microsoft IronRuby/C# MVP On Thu, May 6, 2010 at 8:38 AM, Claudio M. \<[removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid)[mailto:removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid)\> wrote: Hy all, I’m trying to use a 3rd party library into my app via IronRuby Unfortunately the root namespace of this library is lower case and I believe this cause some problem This is the sample code I wish to run require “devDept.EyeshotUltimate” include devDept::Geometry o = Point3D.Origin puts o.x puts o.y puts o.z but the second line throws the exception undefined method `devDept’ for main:Object (NoMethodError) I think I know why this append ([http://ironruby.net/Documentation/.NET/Names](http://ironruby.net/Documentation/.NET/Names)) “CLR namespaces and interfaces must be capitalized as they are mapped onto Ruby modules” Since I can’t modify the 3rd party library is there a way to avoid this error ? Many thanks claudio ## – Claudio M. > **[Just in time ideas](https://testdrivendevelopment.wordpress.com/)** > > Perchè le vostre idee devono diventare prodotti "Giusto in tempo" !!! [http://twitter.com/scott4dev](http://twitter.com/scott4dev) * * * Ironruby-core mailing list [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid)[mailto:removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) [http://rubyforge.org/mailman/listinfo/ironruby-core](http://rubyforge.org/mailman/listinfo/ironruby-core) * * * Ironruby-core mailing list [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid)[mailto:removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) [http://rubyforge.org/mailman/listinfo/ironruby-core](http://rubyforge.org/mailman/listinfo/ironruby-core) – Claudio M. ---
**Author:** ![maxer](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/e47774/32.png) [@maxer](https://www.ruby-forum.com/u/maxer)\ **Post date:** [May 6, 2010, 6:34pm UTC](https://www.ruby-forum.com/t/lower-case-namespace/188124/11 "2010-05-06T18:34:23Z")
This won’t work since C# aliases are available only at compile time. They are not persisted in the resulting assembly. Tomas From: [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) [[mailto:removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid)] On Behalf Of Claudio Maccari Sent: Thursday, May 06, 2010 12:36 AM To: [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) Subject: Re: [Ironruby-core] Lower case namespace But this assembly has no types inside right ? On Thu, May 6, 2010 at 8:55 AM, Shay F. \<[removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid)[mailto:removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid)\> wrote: I can think of a workaround (never checked it though) - create a C# assembly that adds a name alias to the assembly: using DevDept = devDept; and then require this assembly. ## Shay. Shay F. | Microsoft Visual C#/IronRuby MVP | Author of IronRuby Unleashed Blog: [http://IronShay.com](http://IronShay.com) | Twitter: [http://twitter.com/ironshay](http://twitter.com/ironshay) On Thu, May 6, 2010 at 9:48 AM, Ivan Porto C. \<[removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid)[mailto:removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid)\> wrote: you could try with: Geometry = Object.const\_get(“devDept::Geometry”) include Geometry I haven’t tried if this actually works though * * * Met vriendelijke groeten - Best regards - Salutations Ivan Porto C. Web: [http://whiterabbitconsulting.eu](http://whiterabbitconsulting.eu) - [http://flanders.co.nz](http://flanders.co.nz) Twitter: [http://twitter.com/casualjim](http://twitter.com/casualjim) Author of IronRuby in Action ([IronRuby in Action - Ivan Porto Carrero and Adam Burmister | Manning](http://manning.com/carrero)) Microsoft IronRuby/C# MVP On Thu, May 6, 2010 at 8:38 AM, Claudio M. \<[removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid)[mailto:removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid)\> wrote: Hy all, I’m trying to use a 3rd party library into my app via IronRuby Unfortunately the root namespace of this library is lower case and I believe this cause some problem This is the sample code I wish to run require “devDept.EyeshotUltimate” include devDept::Geometry o = Point3D.Origin puts o.x puts o.y puts o.z but the second line throws the exception undefined method `devDept’ for main:Object (NoMethodError) I think I know why this append ([http://ironruby.net/Documentation/.NET/Names](http://ironruby.net/Documentation/.NET/Names)) “CLR namespaces and interfaces must be capitalized as they are mapped onto Ruby modules” Since I can’t modify the 3rd party library is there a way to avoid this error ? Many thanks claudio ## – Claudio M. > **[Just in time ideas](https://testdrivendevelopment.wordpress.com/)** > > Perchè le vostre idee devono diventare prodotti "Giusto in tempo" !!! [http://twitter.com/scott4dev](http://twitter.com/scott4dev) * * * Ironruby-core mailing list [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid)[mailto:removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) [http://rubyforge.org/mailman/listinfo/ironruby-core](http://rubyforge.org/mailman/listinfo/ironruby-core) * * * Ironruby-core mailing list [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid)[mailto:removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) [http://rubyforge.org/mailman/listinfo/ironruby-core](http://rubyforge.org/mailman/listinfo/ironruby-core) * * * Ironruby-core mailing list [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid)[mailto:removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) [http://rubyforge.org/mailman/listinfo/ironruby-core](http://rubyforge.org/mailman/listinfo/ironruby-core) – Claudio M. ---
**Author:** ![maxer](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/e47774/32.png) [@maxer](https://www.ruby-forum.com/u/maxer)\ **Post date:** [May 8, 2010, 11:59am UTC](https://www.ruby-forum.com/t/lower-case-namespace/188124/12 "2010-05-08T11:59:05Z")
Amazing, now it works! 🙂 Thank you very much Tomas!!! Bye Claudio On Thu, May 6, 2010 at 6:31 PM, Tomas M. \