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
28453	transforms are not used for __exact=None lookup	Sergey Fedoseev	Sergey Fedoseev	"Related to #25946.

{{{
class NulledTextField(models.TextField):
    pass

@NulledTextField.register_lookup
class NulledTransform(models.Transform):
    lookup_name = 'nulled'
    template = 'NULL'

class TestModel(models.Model):
    nulled_text_field = NulledTextField(null=True)

>>> Season.objects.filter(nulled_text_field__nulled__isnull=True).exists()
True
>>> Season.objects.filter(nulled_text_field__nulled__exact=None).exists()
False
}}}"	Bug	closed	Database layer (models, ORM)	1.11	Normal	fixed			Ready for checkin	1	0	0	0	0	0