如何在使用不同版本的rails的rails应用程序上运行ruby？

Question

I have about 3 apps on a Windows Server 2012 and all of them are different versions of rails. So far, I can run locally the app with the latest version of rails, but not the other two, which were deployed from Heroku. I wanted to make changes locally before I push them to Heroku but no luck. Is there any reference to that or is this even possible? thanks a lot!

Answer 1

Your problem is that you are trying to use sqlite with Heroku. Heroku requires using 'postgres' as the database

change the gemfile to the following

group :development do
  gem 'sqlite3'
end

group :production do
  gem 'pg'
end

And then change your database.yml file to this

adapter: postgresql