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Fix Caching Issues

The Hemlock app caches many Evergreen responses. This provides a better user experience, and conserves mobile data. But sometimes, you will change something in the Evergreen database and wonder why it doesn't show up in the app. The kinds of things cached are:

  • the org tree
  • org settings, e.g. hemlock.events_calendar_url or credit.payments.allow

For details on how the caching is implemented, see notes on caching.

How to bust the cache for you yourself right now​

Clear the app cache (Android only, under App info >> Storage & cache >> Clear cache), then force-quit the app.

How to invalidate the cache for all patrons​

You can invalidate the cache for all patrons. To do that, add a setting hemlock.cache_key to the org with ID 1. Use a STRING value of today's date in ISO format, e.g. 20230416. Add a number to the end if you change it more than once per day. The format is not itself important, just that it is different from prior values.

See Add Hemlock-specific Org Unit Settings for the specific details of how to add this org unit setting.