Docpad Struggles

the config

# Configure DocPad
docpadConfig = {
  templateData:
		# Get a collection of available categories
		getCategoryList:  ->
			workCollection = @getCollection('documents')
			resultCollection = {}
			for document in workCollection
				resultCollection[document.category] = document.category
			return resultCollection
}
# Export
module.exports = docpadConfig

the template

<ul>
<% for category in @getCategoryList(): %>
 <li>
       <a href="/byCategory/<%= category %>.html">
       <%= category %>
       </a>
</li>
<% end %>
</ul>

theDocument

---
layout: default
author: "Stephan H Wissel"
category: ["After hours", "Twins"]
---
Having <b>Twins</b> is fun