FrontMatter seems to ignore YAML metadata with array of arrays

[avishnyakov]

Got the following front matter truing to get array of arrays of string, two levels. Navigation2 gets completely missed.

Navigation1: "1"
Navigation2:
  - 
    - "a/index.md"
    - "a/a/index.md"
  - 
    - "a/b/index.md"
  - 
    - "a/c/index.md"
  -
    - "a/d/index.md"

Navigation3: "2"

Later in Razor:

 Console.WriteLine("     [+] keys:" + String.Join("\n", document.Keys));

Output:

Navigation1
Navigation3

[daveaglick]

This behavior is mostly by design. YAML is more expressive than what a typical C# object graph can hold. For example, imagine if you also mixed in a few named properties alongside the nested arrays - there’s no good way to represent that beyond making an anonymous or dynamic object. To avoid these kinds of problems and keep the default YAML behavior simple, it only places top-level scalars into the metadata.

There is an alternative - you can use the alternate Yaml module constructor that has a metadata key parameter. Setting that will place the entire YAML model as a dynamic object into the specified key. From there you should be able to access the full YAML data include more complex values.

[hawkerm]

My FrontMatter from my original Jekyll setup looks like this, and I'm having trouble figuring out how to port it over to the Razor template:

---
title: Find The Middle
nav:
 - { url: "index.html", title: "Lessons" }
outline-header: Lessons
outline:
 - { url: "#objective", title: "Objective" }
 - { url: "#config", title: "Suggested Configuration" }
 - { url: "#resources", title: "Resources" }
 - { url: "#classroom", title: "Classroom Notes" }
 - { url: "#commands", title: "Commands Used" }
 - { url: "#api", title: "API Used" }
---

In Jekyll templates I could just check for existance page.outline

    {% for item in page.outline %}
        <li><a href="{{ item.url }}">{{ item.title }}</a></li>
    {% endfor %}

But trying to make a foreach in Razor off the parsed Yaml Metadata object seems a lot more complicated? What am I missing?

This Yaml Module page mentions configuring it somehow, is that in the config.wyam? And there's no link to the documentation on how to actually access it afterwards as a YamlDotNet.Dynamic object; searching for that brings up a repo about it but with no docs.

Examples of accessing this data in a simple manner would be great. Even if I have to create a struct/class somewhere to strongly type it, I'm fine with that if it means I can access things directly later.