A meaningful :attr:`.QueryableAttribute.info` attribute is

added, which proxies down to the ``.info`` attribute on either
the :class:`.schema.Column` object if directly present, or
the :class:`.MapperProperty` otherwise.  The full behavior
is documented and ensured by tests to remain stable.
[ticket:2675]

1 files changed, 31 insertions, 0 deletions

diff --git a/test/orm/test_mapper.py b/test/orm/test_mapper.py
index 66082b549..6b97fb135 100644
--- a/test/orm/test_mapper.py
+++ b/test/orm/test_mapper.py
@@ -407,6 +407,37 @@ class MapperTest(_fixtures.FixtureTest, AssertsCompiledSQL):
             obj.info["q"] = "p"
             eq_(obj.info, {"q": "p"})
 
+    def test_info_via_instrumented(self):
+        m = MetaData()
+        # create specific tables here as we don't want
+        # users.c.id.info to be pre-initialized
+        users = Table('u', m, Column('id', Integer, primary_key=True),
+                            Column('name', String))
+        addresses = Table('a', m, Column('id', Integer, primary_key=True),
+                            Column('name', String),
+                            Column('user_id', Integer, ForeignKey('u.id')))
+        Address = self.classes.Address
+        User = self.classes.User
+
+        mapper(User, users, properties={
+                "name_lower": column_property(func.lower(users.c.name)),
+                "addresses": relationship(Address)
+            })
+        mapper(Address, addresses)
+
+        # attr.info goes down to the original Column object
+        # for the dictionary.  The annotated element needs to pass
+        # this on.
+        assert 'info' not in users.c.id.__dict__
+        is_(User.id.info, users.c.id.info)
+        assert 'info' in users.c.id.__dict__
+
+        # for SQL expressions, ORM-level .info
+        is_(User.name_lower.info, User.name_lower.property.info)
+
+        # same for relationships
+        is_(User.addresses.info, User.addresses.property.info)
+
 
     def test_add_property(self):
         users, addresses, Address = (self.tables.users,