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Parameter type hint in tips-and-tricks

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This commit is contained in:
Maxim Penzin 2020-05-08 10:40:53 +08:00
parent 900703a32a
commit 8d8c7efebb
1 changed files with 6 additions and 2 deletions
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8
doc/tips-and-tricks.md
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@ -173,15 +173,19 @@ Finally we extend `next.jdbc.prepare/SettableParameter` and `next.jdbc.result-se
(require '[next.jdbc.prepare :as prepare])
(require '[next.jdbc.result-set :as rs])
(import '[java.sql PreparedStatement])
(set! *warn-on-reflection* true)
;; if a SQL parameter is a Clojure hash map or vector, it'll be transformed
;; to a PGobject for JSON/JSONB:
(extend-protocol prepare/SettableParameter
clojure.lang.IPersistentMap
(set-parameter [m s i]
(set-parameter [m ^PreparedStatement s i]
(.setObject s i (->pgobject m)))
clojure.lang.IPersistentVector
(set-parameter [v s i]
(set-parameter [v ^PreparedStatement s i]
(.setObject s i (->pgobject v))))
;; if a row contains a PGobject then we'll convert them to Clojure data