Bug Fix for Sorting (#41)

* fix bug with sort vs sortby

Author: bitner

pypgstac/pypgstac/__init__.py

@@ -1,2 +1,2 @@
 """PyPGStac Version."""
-__version__ = "0.3.0"
+__version__ = "0.3.1"

pypgstac/pypgstac/migrations/pgstac.0.3.0-0.3.1.sql

@@ -0,0 +1,29 @@
+SET SEARCH_PATH to pgstac, public;
+set check_function_bodies = off;
+
+CREATE OR REPLACE FUNCTION pgstac.sort_sqlorderby(_search jsonb DEFAULT NULL::jsonb, reverse boolean DEFAULT false)
+ RETURNS text
+ LANGUAGE sql
+AS $function$
+WITH sorts AS (
+    SELECT
+        (items_path(value->>'field')).path as key,
+        parse_sort_dir(value->>'direction', reverse) as dir
+    FROM jsonb_array_elements(
+        '[]'::jsonb
+        ||
+        coalesce(_search->'sortby','[{"field":"datetime", "direction":"desc"}]')
+        ||
+        '[{"field":"id","direction":"desc"}]'::jsonb
+    )
+)
+SELECT array_to_string(
+    array_agg(concat(key, ' ', dir)),
+    ', '
+) FROM sorts;
+$function$
+;
+
+
+
+INSERT INTO migrations (version) VALUES ('0.3.1');