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
4306	'to_field' breaks lookups that span relationships	shwag	nobody	"class Website(models.Model):
    id = models.IntegerField(primary_key=True)
    dfp_id = models.IntegerField()
    name = models.CharField(maxlength=300)
    url = models.CharField(maxlength=150)

class Report(models.Model):
    id = models.IntegerField(primary_key=True)
    site = models.ForeignKey(Website, to_field='dfp_id')

444549 is a valid dfp_id in the Website model.

Report.objects.filter(site=444549)  <-- Returns results. good.
Report.objects.filter(site__id=444549)  <-- Returns results, but it shouldn't.
Report.objects.filter(site__dfp_id=444549)  <-- No results, but it should.

130 is the valid id for a Website.
Report.objects.filter(site__id=130) <- No results, no work around.
Report.objects.filter(site__name='Validname') <- Also no results.
Report.objects.filter(site__url='validurl.com') <- Also no results
"		new	Database layer (models, ORM)	0.96					Unreviewed	0	0	0	0	0	0