Ruby on Rails

On Sep 27, 2011, at 11:24 PM, Robert Walker wrote:

> Walter Davis wrote in post #1023863:
>> I started an application on 1.8.7, and needed to update the server to
>> 1.9.2 to get Passenger to run. Now I'm struggling to get the application
>> to start under Apache+Passenger, and I'm wondering if there might be
>> some 18.7-isms that I need to account for. Does this ring any bells for
>> anyone?
>>
>> My understanding was that any Rails app that would run under 1.8.7 would
>> also run under 1.9.2, but that there may be some optimizations that I'm
>> missing out on under the new Ruby. Is this just wishful thinking?
>
> Where did you get that idea? There were many gems that would not run
> under 1.9.2. Even now there may be some that do not. Are you using any
> gems in your app besides the base Rails gems? What version of Rails are
> you running, because that makes a difference too whether it will run
> under 1.9.2.

That's an interesting point. Because Rails 3 (and by extension, in my mind, any Gem that purports to be compatible with Rails 3) supports both 1.8.7 and 1.9.2, I thought that there would not be any difficulty there. I am using a fairly short list of Gems, all of which are running without apparent errors on the server.

>
> Did you not test your application in a staging environment before
> updating the Ruby on your production server? If not then you may want to
> downgrade to 1.8.7 and do proper testing.

I could not get 1.8.7 to install properly on the server in question, I had multiple problems getting Rubygems and Passenger to install until I moved to 1.9.2. Rolling the server back to 1.8.7 is not a good option for me. What I can do is RVM up to 1.9.2 on my Mac, and re-run my tests there. I do have a complete suite of tests, which pass in 1.8.7. What I don't have yet is a development or staging server with 1.9.2.

Thanks for your help,

Walter

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