Slack webhook not working

[Phil (Phil Snow)]

What information are you trying to send to your Slack integration about activity on Prismic?

Because our webhooks only say that something HAS changed at the moment, they don't say WHAT changed. This might be what is causing your issue.

We are working on improving this at the moment though:

Determining which documents have changed with webhooks

I think I figured it out. The Webhooks do not specify what has changed, just that something has changed. After you receive a webhook you can query your documents by publication date (first_publication_date and last_publication_date ) and use the date.after predicate to get documents that have been published or changed since the previous time you received a webhook. With GraphQL you can use firstPublicationDate_after and lastPublicationDate_after arguments to query after a given date and time.