From 920f77e3c17ec43382e60a992dc4dcec2ba173b8 Mon Sep 17 00:00:00 2001 From: Mike Bayer Date: Fri, 21 Apr 2017 13:35:38 -0400 Subject: Add _negate() to Label to negate inner element Fixed the negation of a :class:`.Label` construct so that the inner element is negated correctly, when the :func:`.not_` modifier is applied to the labeled expression. Change-Id: Ia99917b2959bdfbff28689c962b4203911c57b85 Fixes: #3969 --- lib/sqlalchemy/sql/elements.py | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) (limited to 'lib/sqlalchemy/sql') diff --git a/lib/sqlalchemy/sql/elements.py b/lib/sqlalchemy/sql/elements.py index 414e3f477..1ce03e66a 100644 --- a/lib/sqlalchemy/sql/elements.py +++ b/lib/sqlalchemy/sql/elements.py @@ -3577,7 +3577,13 @@ class Label(ColumnElement): return self._element.self_group(against=operators.as_) def self_group(self, against=None): - sub_element = self._element.self_group(against=against) + return self._apply_to_inner(self._element.self_group, against=against) + + def _negate(self): + return self._apply_to_inner(self._element._negate) + + def _apply_to_inner(self, fn, *arg, **kw): + sub_element = fn(*arg, **kw) if sub_element is not self._element: return Label(self.name, sub_element, -- cgit v1.2.1