Hands-on with Drupal configuration validation

This is a follow-up to my DrupalCon Pittsburgh talk. It does not provide an overview of the status nor the progress, but instead it’s hands-on, with 2 live demos to help attendees:

1. use Config Inspector to find which config is still missing validation constraints, add it, and observe it catching invalid data — by adding 3 lines of YAML!
2. update existing config forms to use validation constraints, including tweaking the validation error message — by adding 6 lines of YAML and copy/pasting 5 lines of PHP!

Each in less than 5 minutes, including the explanation!

In other words: everybody walked out ready to contribute to the DrupalCon sprints on the next day, or to update their own modules.

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I’m honored to say that this was voted the 8th most interesting session at DrupalCon Lille!