id	summary	reporter	owner	description	type	status	component	version	severity	resolution	keywords	cc	stage	has_patch	needs_docs	needs_tests	needs_better_patch	easy	ui_ux
28269	Fix Model._meta._property_names to work with attributes that raise AttributeError	Adam Johnson	nobody	"As reported on the mailing list at https://groups.google.com/forum/#!msg/django-developers/ClQ0mCJ-a6Y/FOYTz98yBgAJ , the optimization I did in model __init__ in commit d2a26c1a90e837777dabdf3d67ceec4d2a70fb86 did not copy in a try/except AttributeError. This fails because some third party apps install ""class only"" descriptors that raise AttributeError when not accessed in an instance, for example: https://github.com/kmmbvnr/django-fsm/blob/2d2eaee/django_fsm/__init__.py#L225

_property_names should be changed to try/except AttributeError when accessing the attributes on the class, and we should add a test to prevent regression."	Bug	closed	Database layer (models, ORM)	1.11	Release blocker	fixed			Accepted	1	0	0	0	0	0