Clojurians Log v2
Clojure programming
Channels
Apps
datascript 2022-12-03
Søren Sjørup 2022-12-03T22:36:50.732109Z
I think I might have found a bug in datascripts handling of many cardinality. This test fails for me:
(let [conn (create-conn)
_
(transact conn
[{:db/ident :x
:db/valueType :db.type/long
:db/cardinality :db.cardinality/many}])
{:keys [tempids]}
(transact conn
[[:db/add "temp" :x 1]
[:db/add "temp" :x 2]])
temp-id (tempids "temp")]
(is (= #{[1] [2]}
(q '[:in $ ?e
:where [?e :x ?x]
:find ?x]
(db conn) temp-id))))
seepel 2022-12-04T23:44:51.564979Z
Datascript handles the schema a bit differently from Datomic. You need to pass the schema to create-conn and the format is slightly different. I think you want your example to look like this.
(let [conn (create-conn {:x {:db/cardinality :db.cardinality/many}})
{:keys [tempids]}
(transact conn
[[:db/add "temp" :x 1]
[:db/add "temp" :x 2]])
temp-id (tempids "temp")]
(is (= #{[1] [2]}
(q '[:in $ ?e
:where [?e :x ?x]
:find ?x]
(db conn) temp-id))))🙏 2