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
2038	QuerySet._combine does not combine where clause	graham@…	Adrian Holovaty	" In db/models/query.py, QuerySet, the _combine method does not actually combine the two query sets. Instead if clones the second one and returns that.

 To reproduce:
- Create a custom manager for an object that uses the admin interface, and has a search box.

- Make that custom manager change the 'where' clause of it's query set, for example by using the 'extra' method to limit the query via a join.

- List the objects in the admin interface. You will see the limited set, which is correct.

- Use the search box on the list admin page. The results now returned are not limited by your manager, because the 'where' clause gets lost.
"	defect	closed	contrib.admin		normal	fixed			Unreviewed	0	0	0	0	0	0