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.

If anyone wants to take a crack at it, it might work if you rename it to init.py and drop it in a subdirectory under the 2.1 addons directory.

See: https://ankitects.github.io/addon-docs/#/porting2.0

I've just tried this under 2.1 and it appears to work, by more or less following eshapard's comment above on 24th Feb. Here's what I did:

1. create a folder called filterSafety in the addons folder ie AppData\Roaming\Anki2\addons21\filterSafety
2. in this folder create a file called __init__.py which contains lines 1 - 20 from filterSafety.py above.
3. restart Anki

You should note that there are two underscores before and after 'init', as seen in point 2 above.

Hope this helps someone else.

Cheers

Am trying this too. Thanks for the quick tutorial @albo2albo !

If I don't come back here to complain then it probably works OR seems to work OR didn't cause major harm.

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.)