Anki 2.0 addon. Prevents learning (and re-learning) cards from being removed from a filtered deck. This allows you to rebuild the deck while keeping the learning cards inside of it; bypassing the problems with Anki decks where learning cards are set back to 'new' or 'review' when they exit a filtered deck.

filterSafety.py

# Filter Safety
# Anki 2.0 addon
# Author EJS 
# https://eshapard.github.io/
#
# Prevents cards in learning state from being moved out of a filtered deck 
# when you rebuild it.
from anki.sched import Scheduler
#from aqt.utils import showInfo

def safeEmptyDyn(self, did, lim=None):
    if not lim:
        lim = "did = %s and type != 1 and queue != 1" % did
    else:
        lim = "%s and type != 1 and queue != 1" % lim
    ret = origEmptyDyn(self, did, lim)
    return ret

origEmptyDyn = Scheduler.emptyDyn
Scheduler.emptyDyn = safeEmptyDyn

Sorry, I don't use Anki anymore, so I'll probably never get around to porting it to 2.1.

Hi, just stumbled on this repo..
@eshapard mind saying what made you quit anki? what do you use instead? (Just curious.. sorry if it seems nosy.)