- Added comparable_property(), adds query Comparator behavior to regular, unmanaged Python properties

- Some aspects of MapperProperty initialization are streteched pretty thin now
  and need a refactor; will proceed with these on the user_defined_state branch

1 files changed, 1 insertions, 22 deletions

diff --git a/examples/vertical/dictlike-polymorphic.py b/examples/vertical/dictlike-polymorphic.py
index 66dcd4856..4065337c2 100644
--- a/examples/vertical/dictlike-polymorphic.py
+++ b/examples/vertical/dictlike-polymorphic.py
@@ -30,7 +30,7 @@ Note: Something much like 'comparable_property' is slated for inclusion in a
 """
 
 from sqlalchemy.orm.interfaces import PropComparator, MapperProperty
-from sqlalchemy.orm import session as sessionlib
+from sqlalchemy.orm import session as sessionlib, comparable_property
 
 # Using the VerticalPropertyDictMixin from the base example
 from dictlike import VerticalPropertyDictMixin
@@ -130,27 +130,6 @@ class PolymorphicVerticalProperty(object):
         return '<%s %r=%r>' % (self.__class__.__name__, self.key, self.value)
 
 
-class comparable_property(MapperProperty):
-    """Instruments a Python property for use in query expressions."""
-
-    def __init__(self, comparator, property):
-        self.property = property
-        self.comparator = comparator(self)
-
-    def do_init(self):
-        class_ = self.parent.class_
-        sessionlib.register_attribute(class_, self.key, uselist=False,
-                                      proxy_property=self.property,
-                                      useobject=False,
-                                      comparator=self.comparator)
-
-    def setup(self, querycontext, **kwargs):
-        pass
-
-    def create_row_processor(self, selectcontext, mapper, row):
-        return (None, None, None)
-
-
 if __name__ == '__main__':
     from sqlalchemy import *
     from sqlalchemy.orm import mapper, relation, create_session