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
19236	M2M fields should type-check rather than just trying for a split() method	Stephen Burrows	Stephen Burrows	"Original thread: https://groups.google.com/forum/?fromgroups=#!topic/django-developers/ZY9uisJynSI

When setting up a relationship between two models, the ""relation"" argument to add_lazy_relation [1] can be either a Model subclass or a string. But the check for whether it's a string is simply ""try calling relation.split(""."")"". If the argument is a Model subclass with a split() method, this fails horribly and unexpectedly.


[1] https://github.com/django/django/blob/master/django/db/models/fields/related.py#L25"	Bug	closed	Database layer (models, ORM)	1.5-alpha-1	Normal	fixed			Accepted	1	0	0	0	1	0