Cache and Pagination not working

Question

I'm trying to get pagination and cache to work together but it's failing.

Here's my current code:

{% cache globally using key
   craft.request.path ~ '/p' ~ craft.request.getPageNum
   for 2 hours %}

{% paginate topicEntries.limit(10)as pageInfo, topicEntries %}

  {% for topic in topicEntries %}

      more code here

  {% endfor %}

{% endcache %

When I use this I get a template error that Variable pageInfo does not exist.

Then if I put the opening cache tag below the paginate tag. The first page shows 10 entries, but each page after that only displays 1 entry per page.

{% paginate topicEntries.limit(10)as pageInfo, topicEntries %}
 {% cache globally using key
    craft.request.path ~ '/p' ~ craft.request.getPageNum
    for 2 hours %}

  {% for topic in topicEntries %}

      more code here

  {% endfor %}

{% endcache %}

What I need to know is how to cache paginated entries so it's 10 per page and when a new entry is added the cache is cleared correctly.

Please advise.

Answer 1

Based on the code you posted on pastebin, it seems like the problem is that you have your pagination outside of the cache tags (assuming this was the case when you had caching implemented). And, I'm assuming that inside your {% include "_includes/pagination" %} you're trying to access pageInfo, which is created by the pagination tag.

To make this work, and be able to implement efficient caching, you need to include your pagination inside your cache tags. In fact, I would also include the logic that creates the topicEntries element criteria above where you have the pagination tag today, inside the cache tag, as it creates DB queries and is directly related to the content you want to cache.

The overall structure of your code should then be:

{% cache globally using key craft.request.path ~ '/p' ~ craft.request.getPageNum for 2 hours %}
    <ul class="feat-box-container">
        {#  lots of code to get topicEntries #}

        {% paginate topicEntries.limit(10) as pageInfo, topicEntries %}

        {% for topic in topicEntries %}
            {# code that outputs list items #}
        {% endfor %}
    </ul>

    {% include "_includes/pagination" %}
{% endcache %}