On Datomic Ions Solo, I'm getting an error Unable to resolve entity: :db/index when trying to transact schema

oh, is :db/index not supported on Datomic Cloud?

I guess fulltext indexes aren't either...

hey all - how do you all deal with possible transaction timeouts? we’ve tried something like

(defn transact-timeout [conn tx timeout timeout-result callback]
  (future
    (callback (deref (d/transact-async conn tx)
                     timeout
                     timeout-result))))

i’m having a rather hard time wrapping my head around datalog query/pull syntaxes. is there a resource other than the official guide that someone can point me toward?

i feel like reading the language grammar and the official reference documentation will help me as a step 2, but for step 1 i just need a bunch of examples

here's an interactive tutorial: http://www.learndatalogtoday.org/

not sure it covers pull

@lwhorton I recommend shoving a bunch of data you’re familiar with into Datascript and then experiment for yourself!

that + the official docs will get you off the ground

I just received this exception when trying to transact to a newly created database:

clojure.lang.ExceptionInfo: Loading database
                                         clojure.core/eval      core.clj: 3206
                                                       ...                    
                                      dev.system/eval34859     REPL Input     
compute.command-processor.streams.customer/create-customer  customer.clj:   31
                         datomic.client.api/eval13775/fn/G       api.clj:  127
                      datomic.client.api.sync/eval34382/fn      sync.clj:   82
                             datomic.client.api.async/ares     async.clj:   56
                                      clojure.core/ex-info      core.clj: 4739
clojure.lang.ExceptionInfo: Loading database
    cognitect.anomalies/category: :cognitect.anomalies/unavailable
     cognitect.anomalies/message: "Loading database"

If I delete the database and try again, I get:

clojure.lang.ExceptionInfo: :db.error/db-deleted 52ece0c2-7322-4eb7-af99-10f6dbc8ae5c has been deleted

@kenny yes, retry on unavailable

Is it possible to retract an entire schema entity if its attributes haven't been used?

@robert.mather.rmm no, schema can’t be retracted

hey team, noob question: I am in the process of switching to a different db, in one of our usecases of datomic I ran the switch in prod -- but I think there are still some stray reads happening, that I may have missed. Is there a quick way to check in datomic -- "what has been the last queried thing?"

Is it possible to run one transaction that both creates an entity and executes a tx fn involving that entity?

Does anyone know what logging to expect from a Peer server talking to ElastiCache in AWS? As far as I can tell, this server has all the VPC networking/security group setup correct but it never seems to put any items into the EC cluster and also seems to log only one connection attempt event and nothing thereafter.

Is there a list somewhere of what I’d expect to see logged at which log levels?