捆绑安装后未加载Rails 3 Gemfile Gems

Question

I'm writing an application in Rails 3 with Ruby v2.0.0.

I have a helper in app/helpers/posts_helper.rb:

module PostsHelper
  def markdown(text)
    @redcarpet = Redcarpet::Markdown.new(Redcarpet::Render::HTML, {fenced_code_blocks: true}) unless @redcarpet
    @redcarpet.render text
  end
end

My Gemfile contains gem 'redcarpet', '~> 2.2' and I have run bundle install with success. However, I get this error whenever I try to load a page that uses this helper:

uninitialized constant PostsHelper::Redcarpet

What can I do to get this working? I'm baffled at this problem.

Edit:

I've also tested Redcarpet in rails console :

$ bundle exec rails console
Loading development environment (Rails 3.2.13)
irb(main):001:0> Redcarpet::Markdown.new(Redcarpet::Render::HTML).render('text *markdownified*')
=> "<p>text <em>markdownified</em></p>\n"

So it works in the console, just not in my helper (or controller, I've tried that, too).

Answer 1

Ruby is trying to find Redcarpet in the PostsHelper namespace. Use ::Redcarpet to raise that to the global namespace