How to cache Stash Data when EE native template caching doesn't work

Question

I needed custom event grouping by category within a Solspace Calendar table. The only way I could find to do this was the following:

Use {exp:stash:append_list} within {exp:calendar:cal} to store the events by category and day.

{exp:stash:append_list name="cal-day-events-{date format="%m"}-{date format="%j"}-{categories show_group="7" limit="1"}{category_id}{/categories}"}

Then use EE's native {exp:channel:calendar} in an embedded template with {exp:stash:get_list} to retrieve the events.

Good news is, it worked!

Since the page is so query intensive I'd like to do some caching to improve the speed of page load.

I tried use EE's native template caching to cache the entire template. It worked on the first load, but subsequent page loads showed no events. It seems that the stash + embedded template approach doesn't work with template caching. Turning it off fixed the issue.

What is a better way to cache this data? Suggestions?

Answer 1

Have a look at the caching options available with stash. See Mustash for cache breaking rules.

The most basic option here would be to cache the lists when creating them with append list. You might also consider using set_list tags instead of append_list where possible as they will be more efficient (that's my understanding at least)