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| author | Mike Bayer <mike_mp@zzzcomputing.com> | 2017-04-21 13:35:38 -0400 |
|---|---|---|
| committer | Mike Bayer <mike_mp@zzzcomputing.com> | 2017-04-21 13:35:38 -0400 |
| commit | 920f77e3c17ec43382e60a992dc4dcec2ba173b8 (patch) | |
| tree | f1bf8b09a0569a7f3e2c8e1fd35fc63c15bd0930 /lib/sqlalchemy/sql/elements.py | |
| parent | ae3ffcf4ea2c131c720a584c29ae66444d929b77 (diff) | |
| download | sqlalchemy-920f77e3c17ec43382e60a992dc4dcec2ba173b8.tar.gz | |
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
Diffstat (limited to 'lib/sqlalchemy/sql/elements.py')
| -rw-r--r-- | lib/sqlalchemy/sql/elements.py | 8 |
1 files changed, 7 insertions, 1 deletions
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, |