"Unable to resolve entity" 尝试处理 Datomic 模式时出错

Question

我是 Datomic 超级新手。我正在尝试将分类法添加到我的数据库中，但出现了一个我无法理解的错误。错误是：

{:datomic.client-spi/request-id "c587b3e8-8f19-45f5-a563-bdba13e3a0d8",
 :cognitect.anomalies/category :cognitect.anomalies/not-found,
 :cognitect.anomalies/message
 ":db.error/not-an-entity Unable to resolve entity: {:idx -1000000, :part :db.part/db} in datom [{:idx -1000000, :part :db.part/db} :db/ident :arb/title]",
 :dbs
 [{:database-id "datomic:dev://localhost:4334/datemo",
   :t 1004,
   :next-t 1009,
   :history false}]}

这是我正在使用的分类法：

[{:db/id #db/id [:db.part/db]
  :db/ident         :arb/title
  :db/unique        :db.unique/identity
  :db/valueType     :db.type/string
  :db/cardinality   :db.cardinality/one
  :db/fulltext      true
  :db/index         true
  :db.install/_attribute :db.part/db}

 {:db/id #db/id [:db.part/db]
  :db/ident         :arb/description
  :db/unique        :db.unique/identity
  :db/valueType     :db.type/string
  :db/cardinality   :db.cardinality/one
  :db.install/_attribute :db.part/db}

 {:db/id #db/id [:db.part/db]
  :db/ident         :arb/content
  :db/unique        :db.unique/identity
  :db/valueType     :db.type/ref
  :db/isComponent   true
  :db/cardinality   :db.cardinality/many
  :db.install/_attribute :db.part/db}]

这是我打的电话：

(def arb-tx (-> (io/resource "schemas/arb.edn") ;; the schema above
                (read-all)
                (first)))

(pprint (<!! (client/transact conn {:tx-data arb-tx})))

我很难从错误信息中理解这里到底有什么是无法解决的。我认为我对引擎盖下发生的事情的理解太模糊，无法理解这里出了什么问题。谁能赐教一下？

Answer 1

Datomic Client 库不支持显式分区或模式定义中的 :db.install/_attribute。在 Datomic 0.9.5430 之前使用 Peers 时需要这些元素。

尝试将您的架构定义替换为：

[{:db/ident         :arb/title
  :db/unique        :db.unique/identity
  :db/valueType     :db.type/string
  :db/cardinality   :db.cardinality/one
  :db/fulltext      true
  :db/index         true}

 {:db/ident         :arb/description
  :db/unique        :db.unique/identity
  :db/valueType     :db.type/string
  :db/cardinality   :db.cardinality/one}

 {:db/ident         :arb/content
  :db/unique        :db.unique/identity
  :db/valueType     :db.type/ref
  :db/isComponent   true
  :db/cardinality   :db.cardinality/many}]

-马歇尔

"Unable to resolve entity" 尝试处理 Datomic 模式时出错

"Unable to resolve entity" error when trying to transact a Datomic schema

clojure

datomic