How to configure Haml's :markdown filter to use Redcarpet with options?

haml, redcarpet, ruby-on-rails

Solution

There’s currently no way to pass options through to the filter engines in Haml. The best solution for now is probably to replace the existing `:markdown` filter with a new one that has the options you want.

Try adding something like this to an initializer:

module Haml::Filters

  remove_filter("Markdown") #remove the existing Markdown filter

  module Markdown

    include Haml::Filters::Base

    def render(text)
      Redcarpet::Markdown.new(Redcarpet::Render::HTML.new(with_toc_data: true)).render(text)
    end

  end
end

Problem

I'm using Rails 3.2.11, Haml 4.0 and Redcarpet 2.2.2. I would like to configure Haml's `:markdown` filter to use Redcarpet with `with_toc_data: true`. In `ApplicationHelper` I tried defining: ``` def markdown(text) markdown = Redcarpet::Markdown.new(Redcarpet::Render::HTML.new(with_toc_data: true)) raw markdown.render(text.to_s) end ``` Though content in `:markdown` gets rendered, but without TOC data. How do I alter how `:markdown` is parsed?

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