datomic

Ask questions on the official Q&A site at https://ask.datomic.com!
2020-09-23T09:01:57.001900Z

@val_waeselynck Hi Valentin, I just finished reading your very interresting post "Using Datomic in your app: a practical guide" https://vvvvalvalval.github.io/posts/2016-07-24-datomic-web-app-a-practical-guide.html I would like to know, 4 years later, what would be the points that have changed the most?

kennytilton 2020-09-23T14:55:47.004600Z

Is it just me, or does everyone think of John McCarthy’s http://www-formal.stanford.edu/jmc/elephant/elephant.html when they contemplate Datomic?

val_waeselynck 2020-09-23T14:59:51.004800Z

@admin055 nothing much has changed really. Datofu has been added to automate some common tasks such as schema declaration and migrations: https://github.com/vvvvalvalval/datofu Some frameworks now make Datomic a bit more battery-included, such as Fulcro or Hodur. I've used neither.

👍 1
seancorfield 2020-09-23T17:07:53.006200Z

It may be just you @hiskennyness -- I'd never heard of Elephant 2000 until you mentioned it. Looking at the syntax, Elephant reminds me more of Prolog than Datalog but I guess that's where the connection comes in?

kennytilton 2020-09-23T17:12:40.009300Z

“It may be just you”. It happens, @seancorfield.The connection I see is “An elephant never forgets!“, ie the possibility of painlessly referring to the past. Fun note: I actually remembered E2K as a DB proposal!

seancorfield 2020-09-23T17:14:57.009500Z

Ah, yes, gotcha!

kennytilton 2020-09-23T17:51:39.009600Z

A more substantial http://www-formal.stanford.edu/jmc/elephant/node3.html#SECTION00030000000000000000.

jaret 2020-09-23T18:07:30.010300Z

New Datomic Cloud Release ^

2020-09-23T20:31:39.010500Z

@val_waeselynck Perfect, thanks. This is clearly one of the strength of Clojure. (y) Another thanks for the Datofu link, I was just telling myself that the schema declaration had perhaps evolved.

twashing 2020-09-23T22:51:41.012Z

From my AWS EBS application, I’m failing to make a simple datomic.client.api/client call to a Datomic Cloud Solo topology. Details here. Am I missing something? https://stackoverflow.com/questions/64037250/datomic-client-api-client-failing-to-reach-a-datomic-cloud-solo-topology

twashing 2020-09-23T23:28:34.016700Z

Ok, got past this. Now getting the error.

{:cognitect.anomalies/category :cognitect.anomalies/forbidden, :cognitect.anomalies/message "Forbidden to read keyfile at s3://<path>/db/<my-app>/read/.keys. Make sure that your endpoint is correct, and that your ambient AWS credentials allow you to GetObject on the keyfile."}
https://docs.datomic.com/cloud/troubleshooting.html#aws-creds But where to find my ambient AWS credentials_”?_