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
16978	Related models cannot have split() method	Mitar	Jonas Obrist	"Related models cannot have `split()` method because `add_lazy_relation` (in `db/models/fields/related.py`) assumes that something with `split()` method must be string. I would propose that:

{{{
        try:
            app_label, model_name = relation.split(""."")
        except ValueError:
}}}

is changed to:

{{{
        try:
            if isinstance(relation, ModelBase):
                raise ValueError
            app_label, model_name = relation.split(""."")
        except ValueError:
}}}"	Bug	closed	Database layer (models, ORM)	dev	Normal	fixed		mmitar@…	Accepted	1	0	0	1	0	0