Lodash's recursive `_.get(value, key)` functionality implemented in Liquid's include partial for Github Pages / Jekyll

get-property.html

{% comment %}

  This works like Lodash's `_.get(value, key)`, where `value` can be an object and `key` a string path to specific value.

  Use it like:

    {% assign translation = site.data.lang[site.lang] %}
    {% capture title %}{% include common/get-property.html value=translation key=page.title %}{% endcapture %}

  And so, you can have your Front Matter title as "path.to.key" translated from your _data/lang/{fi,en}.json to correct value.

{% endcomment %}{%

  if include.value and include.key %}{%

    assign defaultValue = include.default | default: include.key %}{%
    assign value = include.value %}{%
    assign keys = include.key | split: "." %}{%

    for key in keys %}{%

      unless key %}X {{ defaultValue }}{% break %}{% endunless %}{%

      assign value = value[key] %}{%
      unless value %}Y {{ defaultValue }}{% break %}{% endunless %}{%

      if forloop.last %}{{
        value | default: defaultValue }}{%
      endif %}{%

    endfor %}{%
  else %}No "value" or "key" property provided to get-property partial{%
  endif

%}