undefined local variable or method `config' for main:Object - rails

Question

When I run the rails application, I get the following error:

undefined local variable or method \"config\" for main:Object

How c

Answer 1

in your enviroment.rb file, cut any line starting with config and paste into your production.rb/development.rb/test.rb instead.

This is what worked for me when I had a similar problem.

Answer 2

My guess is that you found some code examples from an older version of rails, which called for you to place a config.gem * in your environment.rb file. To fix this add the gem requirement to your gemfile.

Answer 3

I had this problem when an application had been upgraded from Rails 2 to Rails 3. It worked in development but I got this error when running in production mode for the first time because config/environments/production.rb contained Rails 2-style lines such as:

config.cache_classes = true

..which needed converting to Rails 3-style:

<<NameOfYourApp>>::Application.configure do

  config.cache_classes = true
end