run an sql query

rubyonrails-talk
1

Hello All,

Iam new to Ruby on Rails. I am moving my application to Ruby on rails. Is there an way i can call C++ API from ruby, so that i dont have to do much porting on Ruby on Rails.

I have alread an DB and i want to just show only selected columns from one of the table. I am not getting how to write an sql query. Can any one help me in this regard.

Regards, Amit JAin

2

hi amit .. There is no any bridge available for c++ and ruby till.. 1 way is there you can convert your app to ror complete... pls refer this in case of any help http://saurabh.purnaye.googlepages.com Regards Saurabh purnaye saurabh[dot]purnaye[at]gmail[dot]com

Amit Jain wrote:

3

Saurabh Purnaye wrote:

hi amit .. There is no any bridge available for c++ and ruby till.. 1 way is there you can convert your app to ror complete... pls refer this in case of any help http://saurabh.purnaye.googlepages.com Regards Saurabh purnaye saurabh[dot]purnaye[at]gmail[dot]com

Amit Jain wrote:

Hello All,

Iam new to Ruby on Rails. I am moving my application to Ruby on rails. Is there an way i can call C++ API from ruby, so that i dont have to do much porting on Ruby on Rails.

I have alread an DB and i want to just show only selected columns from one of the table. I am not getting how to write an sql query. Can any one help me in this regard.

Regards, Amit JAin

Hello Saurabh,

Thanks for replying me back. 1 way is there you can convert your app to ror complete. How can i achieve this? I have added you on skype. i went thru site, but could not find. Can u send me the exact link.

Regards, Amit Jain

4

hi amit .. There is no any bridge available for c++ and ruby till..

Um you can quite easily write a ruby extension in c++. It's really
just the same as writing one in C (although there are some gotchas
around exception handling, ruby exceptions not unwinding the c++ stack
properly and things like that). We use several such extensions.

Fred

5

Frederick Cheung wrote:

6

Frederick Cheung wrote:

hi amit .. There is no any bridge available for c++ and ruby till..

Um you can quite easily write a ruby extension in c++. It's really just the same as writing one in C (although there are some gotchas around exception handling, ruby exceptions not unwinding the c++
stack properly and things like that). We use several such extensions.

Fred

Can you prvoide me some link or document where i can understand this extensions?

Well there's stuff in the pickaxe, and a quick search for 'ruby c
extension' brings up stuff like How to create a Ruby extension in C in under 5 minutes

7

Carlson & Richardson's "Ruby Cookbook" (O'Rielly) might be a good reference. They present a few different ways to ref a C-based API.