Question

I would like to use a single haml/mustache template, like this:

.foo
  %h2 {{title}}

That I can render two ways:

1) As a partial and passing a hash:

render :partial => 'foo', :mustache => {:title => 'hello world'}
=>
<div class='foo'><h2>hello world</h2></div>

2) As a partial without a hash for use inside a script tag:

:javascript
  render :partial => 'foo'
=>
<script type='text/javascript'>
  <div class='foo'><h2>{{title}}</h2></div>
</script>

I’ve tried various combinations of file names… “_foo.mustache.haml”, for example, however rails won’t recognize that extension.

Also, I’m using the mustache_template_handler.rb from ryan bates:
http://railscasts.com/episodes/295-sharing-mustache-templates

Answer 1

So, this works — but it’s not real template chaining (is that even possible?!)

module MustacheTemplateHandler
  def self.call(template)
    haml = "Haml::Engine.new(#{template.source.inspect}).render"
    if template.locals.include? :mustache
      "Mustache.render(#{haml}, mustache).html_safe"
    else
      haml.html_safe
    end
  end
end
ActionView::Template.register_template_handler(:mustache, MustacheTemplateHandler)