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
29049	Add slicing notation to F expressions	Matthew Pava	Nick Pope	"For fields that are string expressions, the slicing notation should utilize database functions `Substr`, `Left`, and `Right`.  Those functions could even be deprecated to require the use of slicing notation.

For fields that are iterable expressions, such as `ArrayField`s or `HStoreField`s, those could utilize slicing notation in a Pythonic manner."	New feature	closed	Database layer (models, ORM)	dev	Normal	fixed	slice F	Adam Johnson josh.smeaton@…	Ready for checkin	1	0	0	0	0	0