This plugin adds next_article (newer) and prev_article (older)
variables to the article's context.
Also adds next_article_in_category and prev_article_in_category.
<ul>
{% if article.prev_article %}
<li>
<a href="{{ SITEURL }}/{{ article.prev_article.url}}">
{{ article.prev_article.title }}
</a>
</li>
{% endif %}
{% if article.next_article %}
<li>
<a href="{{ SITEURL }}/{{ article.next_article.url}}">
{{ article.next_article.title }}
</a>
</li>
{% endif %}
</ul>
<ul>
{% if article.prev_article_in_category %}
<li>
<a href="{{ SITEURL }}/{{ article.prev_article_in_category.url}}">
{{ article.prev_article_in_category.title }}
</a>
</li>
{% endif %}
{% if article.next_article_in_category %}
<li>
<a href="{{ SITEURL }}/{{ article.next_article_in_category.url}}">
{{ article.next_article_in_category.title }}
</a>
</li>
{% endif %}
</ul>If you want to get the neigbors within a subcategory it's a little different. Since an article can belong to more than one subcategory, subcategories are stored in a list. If you have an article with subcategories like
Category/Foo/Bar
it will belong to both subcategory Foo, and Foo/Bar. Subcategory neighbors are
added to an article as next_article_in_subcategory# and
prev_article_in_subcategory# where # is the level of subcategory. So using
the example from above, subcategory1 will be Foo, and subcategory2 Foo/Bar.
Therefor the usage with subcategories is:
<ul>
{% if article.prev_article_in_subcategory1 %}
<li>
<a href="{{ SITEURL }}/{{ article.prev_article_in_subcategory1.url}}">
{{ article.prev_article_in_subcategory1.title }}
</a>
</li>
{% endif %}
{% if article.next_article_in_subcategory1 %}
<li>
<a href="{{ SITEURL }}/{{ article.next_article_in_subcategory1.url}}">
{{ article.next_article_in_subcategory1.title }}
</a>
</li>
{% endif %}
</ul>
<ul>
{% if article.prev_article_in_subcategory2 %}
<li>
<a href="{{ SITEURL }}/{{ article.prev_article_in_subcategory2.url}}">
{{ article.prev_article_in_subcategory2.title }}
</a>
</li>
{% endif %}
{% if article.next_article_in_subcategory2 %}
<li>
<a href="{{ SITEURL }}/{{ article.next_article_in_subcategory2.url}}">
{{ article.next_article_in_subcategory2.title }}
</a>
</li>
{% endif %}
</ul>