This concerns graphcool framework. Another observation. When I add a relation between a model and the File model (only one I tested) then updatedAt is not changed? Is that intentional?

yes and yes

Ok. I do that 🙂 Thanks. Perhaps we should add information about this behaviour to the docs since at least to me it is unexpected behaviour?

I totally agree! It's kind of covered here already https://www.graph.cool/docs/reference/graphql-api/subscription-api-aip7oojeiv#subscribing-to-relation-changes but we could put that more prominently

ok. I missed that part of the docs 🙂 I checked https://www.graph.cool/docs/reference/database/data-modelling-eiroozae8u#createdat-and-updatedat-fields