Clojurians Log v2

I am trying to update schema to add uniqueness to an attribute like so:

[{:db/id        :owsy/dot-number
  :db/unique    :db.unique/identity}]

clojure.lang.ExceptionInfo: java.lang.IllegalArgumentException: :db.error/invalid-alter-attribute Error: {:db/error :db.error/unique-without-index, :attribute :owsy/dot-number} {:succeeded [{:norm-name :V20200901/clearfork-last-funded-date-SNAPSHOT, :tx-index 0, :tx-result {:db-before datomic.db.Db@ad33f60, :db-after datomic.db.Db@d3dfdde3, :tx-data [#datom[13194140022304 50 #inst "2020-09-10T18:17:17.664-00:00" 13194140022304 true] #datom[13194140022304 72 :V20200901/clearfork-last-funded-date-SNAPSHOT 13194140022304 true] #datom[13194140022304 73 0 13194140022304 true] #datom[456 44 true 13194140022304 true] #datom[0 19 456 13194140022304 true]], :tempids {-9223354444669732589 13194140022304}}}], :failed {:norm-name :V20200901/clearfork-last-funded-date-SNAPSHOT, :tx-index 1, :reason "java.lang.IllegalArgumentException: :db.error/invalid-alter-attribute Error: {:db/error :db.error/unique-without-index, :attribute :owsy/dot-number}"}}

@davewo I think it's saying that your data isn't already unique :db.error/unique-without-index so you can't add a uniqueness constraint

https://docs.datomic.com/on-prem/schema.html#schema-alteration "In order to add :db/unique, you must first have an AVET index including that attribute."

that seems more in line with the error message

ah yeah

good catch!

and because those indexes are added asynch, adding the :db/index in the same tx doesn't work (which I tried)

Is there anyway to clone an in memory peer connection? Lets say I want to transact a large schema and then be able to make clones of it at that point for testing purposes and not incur the schema transaction cost each time?

Perhaps https://github.com/vvvvalvalval/datomock?

@kenny cool, I’ve run across this lib a couple times but I guess it never sunk in what usecase it solved 😄

@colinkahn Have you considered using the new dev-local database? Copying a database is literally cp my-db the-copy-of-my-db

I just saw that today. I’ve been using https://github.com/ComputeSoftware/datomic-client-memdb for testing, but they’re saying to switch over to dev-local. But at first glance seems like it writes to disk which I don’t need for tests.