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

Wow, this is timely. I was just whining about this issue the other day but hadn't had time to do something similar. https://anki.tenderapp.com/discussions/ankidesktop/24502-why-is-there-no-option-to-filter-parent-decks-like-filtered-decks

My decks relies on hierarchy, so eventually I need to figure out a way to get root decks to ignore the alphabetical order of subdecks and treat all the cards in the subdeck as a single deck, (to give me ascending ivl for all subdecks regardless of deck hierarchy). This might be a nice stop-gap until I figure that out and stop using filtered decks for anything besides cramming.

Thanks for making it public.

UPDATE: been using since i commented. Has been great.

Godlike. I've been using filtered decks for years, but I just used the workaround by including a "is:due -is:learn" but it's not a perfect solution for cards that are in the re-learning queue in the filtered deck, which can get lost if you have to rebuild. Awesome fix!

Do you have any plans of porting this add on to 2.1? Would love that. Keep up the good work

Still waiting for 2.1 :)

Waiting for 2.1 port too :)

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.)