[SOLVED] Haml Markdown Filter Breaking on Example Ruby Code in Rails

Haml Markdown Filter Breaking on Example Ruby Code in Rails

I'm using Haml in rails and have been writting with the :markdown filter (bluecloth gem), but a piece of example code is in ruby and the page tries to execute the #{values}, how can I stop this?

Here is the breaking bit of code:

:markdown
  like_frags = [fields].flatten.map { |f| "LOWER(#{f}) LIKE :word#{count}" }
    or_frags << "(#{like_frags.join(" OR ")})"
    binds["word#{count}".to_sym] = "%#{word.to_s.downcase}%"
    count += 1
  end

The error that is returned:

undefined local variable or method `f'

I have found a solution myself but it's far from ideal:

- f=nil;count=nil;like_frags=[];word=nil;

I place this before the :markdown filter begins.

I know it can be done because stackoverflow didn't break when I wrote that, so how can I achieve this too?

Thanks in advance!

Solution

Per the Haml documentation, interpolation within filters is normal and expected. To circumvent it, you can just escape the #{} interpolation syntax by prepending a backslash:

:markdown
  like_frags = [fields].flatten.map { |f| "LOWER(\#{f}) LIKE :word\#{count}" }
    or_frags << "(\#{like_frags.join(" OR ")})"
    binds["word\#{count}".to_sym] = "%\#{word.to_s.downcase}%"
    count += 1
  end