Allow multiple expressions in special :order-by

src/honey/sql.cljc

@@ -1513,9 +1513,9 @@
       (let [[sql & params] (format-expr x {:nested true})]
         (into [(str "NOT " sql)] params)))
     :order-by
-    (fn [k [e q]]
+    (fn [k [e & qs]]
       (let [[sql-e & params-e] (format-expr e)
-            [sql-q & params-q] (format-dsl {k [q]})]
+            [sql-q & params-q] (format-dsl {k qs})]
         (-> [(str sql-e " " sql-q)]
             (into params-e)
             (into params-q))))

test/honey/sql/postgres_test.cljc

@@ -388,6 +388,18 @@
                  (modifiers :distinct-on :a :b)
                  (sql/format :quoting :ansi))))))
 
+(deftest select-agg-order-by-test
+  (testing "single expression in order by"
+    (is (= ["SELECT ARRAY_AGG(a ORDER BY x) FROM products"])
+        (sql/format
+          {:select [[[:array_agg [:order-by :a :x]]]]
+           :from   :products})))
+  (testing "multiple expressions in order by"
+    (is (= ["SELECT ARRAY_AGG(a ORDER BY x ASC, y DESC, z ASC) FROM products"]
+           (sql/format
+             {:select [[[:array_agg [:order-by :a [:x :asc] [:y :desc] :z]]]]
+              :from   :products})))))
+
 (deftest create-extension-test
   ;; previously, honeysql required :allow-dashed-names? true
   (testing "create extension"