Rails Error In Production, may due to link_tag and precompilation

Question

I have installed rails 3.1 with apache2 and passenger on ubuntu 10.04. using ruby 1.9.2 with RVM

Answer 1

I've found the answer myself, The reason for the error is rails app needs javascript runtime for certain features of sass, coffeescript and uglifier to work.

There are many ways to solve this, by installing javascript runtimes like nodejs

But, the solution I went with, and perhaps the easiest one is, adding gem 'therubyracer' to my Gemfile and then running bundle install

Excerpt from my Gemfile is below

# Gems used only for assets and not required
# in production environments by default.
group :assets do
  gem 'therubyracer'
  gem 'sass-rails', "  ~> 3.1.0"
  gem 'coffee-rails', "~> 3.1.0"
  gem 'uglifier'
end

adding therubyracer also fixes rake assets:precompile

Hope this helps. I've spent days searching for this solution.