Rails doesn't show my image files. Route error [GET] - ruby-on-rails

Question

I wrote:
$('.book_cover_here').html("<img src='http://bookworm.az/public" + $(this).data("cover") + "' />");
});
So, the whole URL is correct:
http://bookworm.az/public/uploads/covers/bookworm-2.png
But it doesn't show image file and prints Route error [GET]. I was added to config/application.rb the next line:
config.serve_static_assets = true
But it doesn't help too. How can I fix this problem?
UPDATE
Started GET "/public/uploads/covers/bookworm-2.png" for 194.135.152.236 at 2015-01-03 07:33:32 -0500
ActionController::RoutingError (No route matches [GET] "/public/uploads/covers/bookworm-2.png"):
actionpack (4.1.8) lib/action_dispatch/middleware/debug_exceptions.rb:21:in `call'
actionpack (4.1.8) lib/action_dispatch/middleware/show_exceptions.rb:30:in `call'
railties (4.1.8) lib/rails/rack/logger.rb:38:in `call_app'
railties (4.1.8) lib/rails/rack/logger.rb:20:in `block in call'
activesupport (4.1.8) lib/active_support/tagged_logging.rb:68:in `block in tagged'
activesupport (4.1.8) lib/active_support/tagged_logging.rb:26:in `tagged'
activesupport (4.1.8) lib/active_support/tagged_logging.rb:68:in `tagged'
railties (4.1.8) lib/rails/rack/logger.rb:20:in `call'
actionpack (4.1.8) lib/action_dispatch/middleware/request_id.rb:21:in `call'
rack (1.5.2) lib/rack/methodoverride.rb:21:in `call'
rack (1.5.2) lib/rack/runtime.rb:17:in `call'
activesupport (4.1.8) lib/active_support/cache/strategy/local_cache_middleware.rb:26:in `call'
rack (1.5.2) lib/rack/lock.rb:17:in `call'
actionpack (4.1.8) lib/action_dispatch/middleware/static.rb:84:in `call'
rack (1.5.2) lib/rack/sendfile.rb:112:in `call'
railties (4.1.8) lib/rails/engine.rb:514:in `call'
railties (4.1.8) lib/rails/application.rb:144:in `call'
rack (1.5.2) lib/rack/lock.rb:17:in `call'
rack (1.5.2) lib/rack/content_length.rb:14:in `call'
rack (1.5.2) lib/rack/handler/webrick.rb:60:in `service'
/usr/share/ruby/webrick/httpserver.rb:138:in `service'
/usr/share/ruby/webrick/httpserver.rb:94:in `run'
/usr/share/ruby/webrick/server.rb:295:in `block in start_thread'

Answer 1

Have you tried removing the /public/ part from your URL?
When you launch the Rails application, you don't have to explicitly tell the application to search stuff from the public folder anymore. Rails will search for all assets in public folder by default during runtime.
So in your case:
('.book_cover_here').html("<img src='http://bookworm.az/" + $(this).data("cover") + "' />");

Answer 2

"<img src='http://bookworm.az/public" + $(this).data("cover") + "' />"
you open double quotes, then open single quotes, but then close double quotes and single quotes still open. is it correct?