datomic

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tatut 2021-04-20T04:49:17.349Z

we too have authorization rules at the boundary, all commands and queries from clients are authorized… I think it’s common that authorization is based on a few core entities that are part of the query args / command payload

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steveb8n 2021-04-20T05:05:29.349900Z

Q: about creating a global datomic cloud service i.e. multi-regions. does anyone have experience with this? https://forum.datomic.com/t/replication-of-some-all-datoms-to-other-dbs/1779

jaret 2021-04-21T16:16:15.353900Z

Hey @steveb8n sorry I missed the post. I just updated on the forum thread as slack gets archived. I am just hoping to understand the problem space a little bit better before I jump into cross region advice/approaches.

steveb8n 2021-04-21T23:11:39.354300Z

@jaret thanks. I’ve replied there too. better for it to be in a permanent record for others.

tatut 2021-04-20T06:45:15.350200Z

that nubank presentation with filter was interesting, it would be to see actual performance numbers… it would seem to me that the filter approach can’t use indexes efficiently, but don’t know any details

2021-04-20T08:09:50.351700Z

Understanding question: If you pull an existing attribute (that isn’t :db/id) of a non-existing entity, you get nil, but if you pull :db/id of that same non-existing entity, you get {:db/id nil} . Why is that?