Expected to define. When calling class inside a module

Question

I new to rails. I have a setup in the lib directory like so:

lib/    blog/      core/         search/             base.rb 

The base.rb defines the Base class as well:

module Blog   module Core     module Search       class Base          attr_accessor :properties          def initialize(params)           @properties = {}         end       end     end   end end 

I have the following code in my application.rb

config.autoload_paths += Dir["#{config.root}/lib/**/"] 

When I include it in posts controller I get following errors:

LoadError in PostsController#index  Expected /home/usr/code/blog/lib/blog/core/search/base.rb to define Base 

Any idea? I'm using rails 3.2.5 with RVM. Thank you for every advice.

UPDATED: Added my full stack:

Started GET "/admin/posts" for 127.0.0.1 at 2012-06-08 21:06:18 +0800  LoadError (Expected /home/usr/code/blog/lib/blog/core/search/base.rb to define Base):   app/controllers/admin/base_controller.rb:5:in `<top (required)>'   app/controllers/admin/posts_controller.rb:6:in `<top (required)>'     Rendered /home/usr/.rvm/gems/[email protected]/gems/actionpack-3.2.5/lib/action_dispatch/middleware/templates/rescues/_trace.erb (1.9ms)   Rendered /home/usr/.rvm/gems/[email protected]/gems/actionpack-3.2.5/lib/action_dispatch/middleware/templates/rescues/_request_and_response.erb (0.6ms)   Rendered /home/usr/.rvm/gems/[email protected]/gems/actionpack-3.2.5/lib/action_dispatch/middleware/templates/rescues/diagnostics.erb within rescues/layout (7.0ms) 

Answer 1

I had the same problem. It comes from the fact that you try to load /lib/blog/core/search/base.rb directly in application.rb with /lib/**/

Error I had:

Expected /[...]/myapp/lib/durative/base.rb to define Base (LoadError) 

Directory structure:

lib/  --durative/    --base.rb 

base.rb:

module Durative   class Base     def initialize(config)        @config = {}     end     #...   end end 

application.rb:

config.autoload_paths += Dir["#{config.root}/lib/**/"] 

Here are the changes I made to make it work

Directory structure:

lib/  --durative.rb **(added)**  --durative/    --base.rb 

durative.rb:

require 'durative/base' 

base.rb (no change)

application.rb (changed):

config.autoload_paths += Dir["#{config.root}/lib/"] 

Tell us if it worked for you too.

Answer 2

I had the same issue. The problem was because I was including subdirs without including their parent lib dir:

# did not work config.autoload_paths += %W(#{config.root}/lib/foo) 

and

# in lib/foo/my_class.rb module Foo   class MyClass   end end 

Foo::MyClass would return Expected to define MyClass

adding the lib dir to config.autoload_paths fixes the problem

# worked config.autoload_paths += %W(#{config.root}/lib #{config.root}/lib/foo)