Fix using aggregated subqueries in order by section

BMariscal · Jun 1, 2020 · 2f635b6 · 2f635b6
1 parent ed37926
commit 2f635b6
Showing 1 changed file with 3 additions and 2 deletions.
diff --git a/pony/orm/sqltranslation.py b/pony/orm/sqltranslation.py
@@ -910,8 +910,9 @@ def apply_lambda(translator, func_id, filter_num, order_by, func_ast, argnames,
                     translator.inside_order_by = True
                     new_order = []
                     for node in nodes:
-                        if isinstance(node.monad, SetMixin):
-                            t = node.monad.type.item_type
+                        monad = node.monad.to_single_cell_value()
+                        if isinstance(monad, SetMixin):
+                            t = monad.type.item_type
                             if isinstance(type(t), type): t = t.__name__
                             throw(TranslationError, 'Set of %s (%s) cannot be used for ordering'
                                                     % (t, ast2src(node)))