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
13688	Ability to specify the field type for extra select	jonozzz	nobody	"{{{
Entry.objects.extra(select={'is_recent': ""pub_date > '2006-01-01'""})
}}}
should look like:
{{{
Entry.objects.extra(select={BooleanField('is_recent'): ""pub_date > '2006-01-01'""})
}}}
Ideally this would map over the existing fields.

The idea is that some of the extra fields might need preparation before using them in python (like custom fields). This is done by to_python() method, but for extra fields there's no such thing. 
They will always contain the raw DB data.

"	New feature	closed	Database layer (models, ORM)	1.2	Normal	wontfix	extra select field types		Design decision needed	0	0	0	0	0	0