- express most of the orm.util functions in terms of the inspection system

- modify inspection system:
	1. raise a new exception for any case where the inspection
        context can't be returned.  this supersedes the "not mapped"
        errors.
        2. don't configure mappers on a mapper inspection.  this allows
        the inspectors to be used during mapper config time.  instead,
        the mapper configures on "with_polymorphic_selectable" now,
        which is needed for all queries
- add a bunch of new "is_XYZ" attributes to inspectors
- finish making the name change of "compile" -> "configure", for some reason
this was only done partially

1 files changed, 4 insertions, 2 deletions

diff --git a/lib/sqlalchemy/orm/state.py b/lib/sqlalchemy/orm/state.py
index ea0e89caf..2b846832e 100644
--- a/lib/sqlalchemy/orm/state.py
+++ b/lib/sqlalchemy/orm/state.py
@@ -13,7 +13,7 @@ defines a large part of the ORM's interactivity.
 
 import weakref
 from .. import util
-from . import exc as orm_exc, attributes, util as orm_util
+from . import exc as orm_exc, attributes, util as orm_util, interfaces
 from .attributes import (
     PASSIVE_NO_RESULT,
     SQL_OK, NEVER_SET, ATTR_WAS_SET, NO_VALUE,\
@@ -24,7 +24,7 @@ instrumentation = util.importlater("sqlalchemy.orm", "instrumentation")
 mapperlib = util.importlater("sqlalchemy.orm", "mapperlib")
 
 
-class InstanceState(object):
+class InstanceState(interfaces._InspectionAttr):
     """tracks state information at the instance level."""
 
     session_id = None
@@ -39,6 +39,8 @@ class InstanceState(object):
     deleted = False
     _load_pending = False
 
+    is_instance = True
+
     def __init__(self, obj, manager):
         self.class_ = obj.__class__
         self.manager = manager