- if @classproperty is used with a regular class-bound

mapper property attribute, it will be called to get the
actual attribute value during initialization. Currently,
there's no advantage to using @classproperty on a column
or relationship attribute of a declarative class that
isn't a mixin - evaluation is at the same time as if
@classproperty weren't used. But here we at least allow
it to function as expected.
- docs for column_property() with declarative
- mixin docs in declarative made more clear - mixins
are optional - each subsection starts with, "in *declarative mixins*",
to reduce confusion

1 files changed, 1 insertions, 1 deletions

diff --git a/lib/sqlalchemy/sql/expression.py b/lib/sqlalchemy/sql/expression.py
index 050b5c05b..96147a94a 100644
--- a/lib/sqlalchemy/sql/expression.py
+++ b/lib/sqlalchemy/sql/expression.py
@@ -1813,7 +1813,7 @@ class ColumnElement(ClauseElement, _CompareMixin):
         else:
             name = str(self)
             co = ColumnClause(self.anon_label, selectable, type_=getattr(self, 'type', None))
-
+        
         co.proxies = [self]
         selectable.columns[name] = co
         return co