Add a function to get an article by id.

src/main/blog/db.cljs

@@ -27,7 +27,18 @@
     (try
       (let [res (<p! (. client query "select * from articles"))]
         (>! channel (.-rows res)))
-      (catch js/Error err (js/console.log (ex-cause err))))
-    )
+      (catch js/Error err (js/console.log (ex-cause err)))))
+  channel)
+
+(defn get-article
+  "Reads an article with the id and returns via channel. It gets and returns the same channel. Empty collection if not found."
+  [client id channel]
+  (go
+    (try
+      (let [res (<p! (.query client
+                             "select * from articles where id=$1"
+                             (cljs.core/clj->js [id])))]
+        (>! channel (.-rows res)))
+      (catch js/Error err (js/console.log (ex-cause err)))))
   channel)