add sort direction

spaceweather_processing/app.py

@@ -136,8 +136,14 @@ class DataProductDB:
 
         # if a &sort=<field> url parameter is given then use sort, otherwise omit it (backward compatibility)
         if sort:
+            if sort[0]=='-':
+                direction = -1
+                sort = sort[1:]
+            else:
+                direction = 1
+
             results = [augment_item(item) for item in
-                       self.db[collection_name].find(query, selected_fields).skip(skip).limit(limit).sort(sort)]
+                       self.db[collection_name].find(query, selected_fields).skip(skip).limit(limit).sort(sort,direction)]
         else:
             results = [augment_item(item) for item in
                        self.db[collection_name].find(query, selected_fields).skip(skip).limit(limit)]