Why i get "No suitable driver found for jdbc:://127.0.0.1/" ?

Mon, 26 Sep 2022 21:45:00 +0000

Java version :

openjdk 18.0.2-ea 2022-07-19
OpenJDK Runtime Environment (build 18.0.2-ea+9-Ubuntu-222.04)
OpenJDK 64-Bit Server VM (build 18.0.2-ea+9-Ubuntu-222.04, mixed mode, sharing)

but when i start the nREPL in my text editor, it's says :

Starting nREPL server...
/usr/lib/jvm/java-11-openjdk-amd64/bin/java ...

Dependencies :

:dependencies [[org.clojure/clojure "1.11.1"]
               [com.github.seancorfield/next.jdbc "1.3.834"]
               [org.postgresql/postgresql "42.5.0"]
               [com.layerware/hugsql "0.5.3"]]

code :

(def db
    {:classname "org.postgresql.Driver"
     :subprotocol "postgresql"
     :subname "reporting"
     :user "admin"
     :password "admin"})

(defn add-user-transaction [users]
  (jdbc/with-transaction [t-conn db]
                         (if-not (find-user t-conn {:id (:id users)})
                           (add-user! t-conn users))))

Everything works normal with that configuration, but only when i evaluate

(add-user-transaction {:id "cheryl"
                   :pass "Cheryl"})

the error appears.

It's asked in Clojure: Execution error (SQLException) at java.sql.DriverManager/getConnection (DriverManager.java:702) and already have answered, but the only answer in there is using :deps or deps.edn (as far i know, this is Maven repository), so how about leiningen? Or did i miss something about leiningen and Maven?
And i even restarting my pc, text editor, and nREPL but nothing change.

Next.jdbc plan row realization

Wed, 26 Feb 2020 02:34:42 +0000

What is the prefered way to realize row from the result of next.jdbc/plan as is, without any transformation?

Identity doesn't work:

(require '[next.jdbc :as jdbc])

(def sql-params
  ["SELECT column1
      FROM (VALUES (1, 1, 1),
                   (2, 2, 2),
                   (3, 3, 3)) AS _"])

(into []
      (map identity)
      (jdbc/plan db-spec
                 sql-params))
;=> [{row} from `plan` -- missing `map` or `reduce`?
;    {row} from `plan` -- missing `map` or `reduce`?
;    {row} from `plan` -- missing `map` or `reduce`?]

If rows are represented as maps (default), #(into {} %) works:

(into []
      (map #(into {} %))
      (jdbc/plan db-spec
                 sql-params))
;=> [{:column1 1} {:column1 2} {:column1 3}]

If rows are represented as vectors (builder-fn), vec can be used:

(require '[next.jdbc.result-set :as rs])

(into []
      (map vec)
      (jdbc/plan db-spec
                 sql-params
                 {:builder-fn rs/as-arrays}))
;=> [[1] [2] [3]]

Is there any xform that would cover both map and vector row realization?

Or should I use something other than plan for lazy result set reading?

Clojure Q&A - Recent questions tagged next.jdbc

Why i get "No suitable driver found for jdbc:://127.0.0.1/" ?

Next.jdbc plan row realization