Here is a Clojurescript database connection in NodeJS and below it the
JS I ported it from. 2 questions:
1. I believe core.async is the way instead of replicating NodeJS nested
callbacks. What is the equivalent using core.async?
2. I couldn't get ((.rows result) 0) to work for result.rows[0].
result.rows worked as-is in cljs but I don't understand why.
gvim
(ns ndpg.core
(:require [cljs.nodejs :as n]))
(n/enable-util-print!)
(def pg (n/require "pg"))
(def con "postgres://admin:p@localhost:5432/astro")
(def client (pg.Client. con))
(.connect client
(fn [err]
(if err
(.error js/console "Couldn't connect" err)
(.query client "select * from births"
(fn [err result]
(if err
(.error js/console "Query error" err)
(do
(.log js/console result.rows)
(.end client))))))))
(defn -main []
(println (range 1 100)))
(set! *main-cli-fn* -main)
;;;;;;;;;;;;;;;;;;;;;;; JS ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
var con = "postgres://admin:p@localhost:5432/db";
var client = new pg.Client(con);
client.connect(function(err) {
if(err) {
return console.error("Couldn't connect", err);
}
client.query('SELECT * FROM births', function(err, result) {
if(err) {
return console.error('Query error', err);
}
console.log(result.rows[0]);
client.end();
});
});
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