This is an example of displaying breadcrumbs for products within a sub-collection in Shopify.

Breadcrumbs for sub-collections [Shopify]

{% for link in linklists.sidebar.links %}
  {% assign cur_parent = link.title | handleize %}
	{% assign cur_parent_url = link.url %}
	{% if linklists.[cur_parent].links.size > 0 %}
		{% for link in linklists.[cur_parent].links %}
			{% if link.title == collection.title %}
				{% assign parent = cur_parent %}
				{% assign parent_url = cur_parent_url %}
			{% endif %}
		{% endfor %}
	{% endif %}
{% endfor %}

<div class="breadcrumbs">
	<a href="/">home</a> // 
	{% if parent.size > 0 %}<a href="{{ parent_url }}">{{ parent }}</a> //{% endif %}
	<a href="{{ collection.url }}">{{ collection.title }}</a>
</div> <!-- end #breadcrumbs -->

Hi, I am trying to create 2 levels down. How to I get grandparent url when I'm at second level?

Here's my code,

{% for link in linklists.main-menu.links %}
{% assign cur_parent = link.handle %}
{% assign cur_parent_title = link.title %}
{% assign cur_parent_url = link.url %}

{% if linklists[cur_parent].links.size > 0 %}
{% for link in linklists.[cur_parent].links %}
{% assign cur_parent_2 = link.handle %}
{% assign cur_parent_title_2 = link.title %}
{% assign cur_parent_url_2 = link.url %}

  {% if link.title == collection.title %}
    {% assign parent = cur_parent_title %}
    {% assign parent_url = cur_parent_url %}

  {% endif %}

    {% if linklists[cur_parent_2].links.size > 0 %}
      {% for link in linklists.[cur_parent_2].links %}
        {% if link.title == collection.title %}
          {% assign parent_2 = cur_parent_title_2 %}
          {% assign parent_url_2 = cur_parent_url_2 %}
        {% endif %}

      {% endfor %}
    {% endif %}
{% endfor %}

{% endif %}
{% endfor %}

{% if parent.size > 0 %}› {{ parent }} › {{ collection.title }} {% else %}› {{ collection.title }}{% endif %}

{% if parent_2.size > 0 %}› {{ parent_2 }} › {{ collection.title }}{% endif %}