Description

nikolayandr

opened on Aug 1, 2020

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In this case

Exception in thread "main" java.util.concurrent.ExecutionException: java.lang.RuntimeException: java.lang.NullPointerException
	at datomic.promise$throw_executionexception_if_throwable.invoke(promise.clj:10)
	at datomic.promise$settable_future$reify__6471.deref(promise.clj:54)
	at clojure.core$deref.invoke(core.clj:2206)
	at datomic.promise$settable_future$reify__6471.get(promise.clj:45)

is thrown on attempting transact data which contains call to :examples/ensure-composite

See more details https://forum.datomic.com/t/transaction-functions-written-in-java-do-not-work-for-datomic-mem-protocol-when-application-is-run-in-java-11/1546

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1. toddbrawn-1 commented on Jun 16, 2021

   

   toddbrawn-1

   on Jun 16, 2021

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   In this call:
   results = Peer.query("[:find [?artist-name ...] " +
   " :in $ ?country [?reference ...] " +
   " :where [(datomic.api/entid $ ?country) ?country-id] " +
   " [?artist :artist/name ?artist-name] " +
   " [?artist ?reference ?country-id]]",
   db, Util.read(":country/BE"), Util.list(Util.read(":artist/country")));

   I am getting the following error: java.lang.ClassNotFoundException: datomic.api, compiling:(NO_SOURCE_PATH:0:0)

   Can you tell me what configuration I am missing?

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