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
14243	defer and only are not respected by values and by valuest_list()	pma_	nobody	"data model with 2 field owner and category

run query like 
result = CatalogCategories.objects.only('id', 'category').values() #or values_list()

you always will get full record
"		closed	Database layer (models, ORM)	1.2		invalid	defer only values		Unreviewed	0	0	0	0	0	0