Question

如何从返回的地图中获取生成的密钥。它似乎以“（）”结尾，我似乎无法像常规键一样使用它。

(defn create-map-db [mapname]
  (insert! db-settings :MAP_TABLE {:M_NAME mapname})
  )

(first (create-map-db "Moskau"))
=> {:scope_identity() 3}

(type (first (create-map-db "Moskau")))
=> clojure.lang.PersistentArrayMap

(get (first (create-map-db "Moskau")) :scope_identity())
=> ()

(get (first (create-map-db "Moskau")) :scope_identity)
=> nil

Answer 1

我可以看到类似以下内容的最便携式解决方案：

(first (vals (first (create-map-db "Moskau"))))

但如果您真的想要，可以直接使用以下方式访问密钥：

(def generated-key (keyword "scope_identity()"))
(generated-key (first (create-map-db "Moskau")))

这也可用于所有生成的密钥：

(map generated-key (create-map-db "Moskau"))

如何访问clojure jdbc insert的生成密钥

1 个答案: