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
11576	FilterSpec and Null values	twiinz@…	nobody	"FilterSpec don't do much at the moment concerning fields that accept Null values.

I patched DateFieldFilterSpec to fix this issue.

I believe the same can be done for the rest of the FilterSpec.

For the BooleanFieldFilterSpec, I wonder why not checking self.field.null instead of requiring the developers to define a NullBooleanField in their model.
"		closed	contrib.admin	1.0		duplicate	FilterSpec		Accepted	1	0	0	0	0	0