Implement relationship to AliasedClass; deprecate non primary mappers

Implemented a new feature whereby the :class:`.AliasedClass` construct can
now be used as the target of a :func:`.relationship`.  This allows the
concept of "non primary mappers" to no longer be necessary, as the
:class:`.AliasedClass` is much easier to configure and automatically inherits
all the relationships of the mapped class, as well as preserves the
ability for loader options to work normally.

- introduce new name for mapped_table, "persist_selectable".  this is
the selectable that selects against the local mapper and its superclasses,
but does not include columns local only to subclasses.

- relationship gains "entity" which is the mapper or aliasedinsp.

- clarfiy name "entity" vs. "query_entity" in loader strategies.

Fixes: #4423
Fixes: #4422
Fixes: #4421
Fixes: #3348

Change-Id: Ic3609b43dc4ed115006da9ad9189e574dc0c72d9

1 files changed, 0 insertions, 18 deletions

diff --git a/test/ext/test_mutable.py b/test/ext/test_mutable.py
index 9b8f761e9..eae764d40 100644
--- a/test/ext/test_mutable.py
+++ b/test/ext/test_mutable.py
@@ -824,15 +824,6 @@ class MutableWithScalarJSONTest(_MutableDictTestBase, fixtures.MappedTest):
         self._test_non_mutable()
 
 
-class MutableIncludeNonPrimaryTest(MutableWithScalarJSONTest):
-    @classmethod
-    def setup_mappers(cls):
-        foo = cls.tables.foo
-
-        mapper(Foo, foo)
-        mapper(Foo, foo, non_primary=True, properties={"foo_bar": foo.c.data})
-
-
 class MutableColumnCopyJSONTest(_MutableDictTestBase, fixtures.MappedTest):
     @classmethod
     def define_tables(cls, metadata):
@@ -1013,15 +1004,6 @@ class MutableAssociationScalarPickleTest(
         )
 
 
-class MutableAssocIncludeNonPrimaryTest(MutableAssociationScalarPickleTest):
-    @classmethod
-    def setup_mappers(cls):
-        foo = cls.tables.foo
-
-        mapper(Foo, foo)
-        mapper(Foo, foo, non_primary=True, properties={"foo_bar": foo.c.data})
-
-
 class MutableAssociationScalarJSONTest(
     _MutableDictTestBase, fixtures.MappedTest
 ):