Finding first and last published dates on a web page using custom fields and actions.

Hi. If I want to show when a document was first published and last published on a web page how would I find that info? For last published, I guess _updatedAt is the correct timestamp, but _createdAt might not be the same as first published. I Have tried getting the transactions from the history api, but I'm not sure how to retrieve first published from the ndjson that is returned...

I found this: https://www.sanity.io/schemas/make-a-field-read-only-after-publishing-once-d87bf5f6 So I'm thinking the the solution is to create a custom "publish" action that sets a "firstPublished" field the first time

Yes, you’re correct! You’d need to create your own fields for this.

This led me to reading the docs on custom actions, and my case is exactly what is documented :D

I love it when that happens!