fix shared deck conf warning

pylib/anki/decks.py

@@ -63,9 +63,6 @@ class DeckManager:
     def __init__(self, col: anki.storage._Collection) -> None:
         self.col = col.weakref()
         self.decks = DecksDictProxy(col)
-        # do not access this directly!
-        # self._cache: Dict[int, ] = {}
-        #        self.decks = {}
 
     def save(self, g: Dict = None) -> None:
         "Can be called with either a deck or a deck configuration."
@@ -78,8 +75,6 @@ class DeckManager:
             self.update_config(g)
             return
         else:
-            # g["mod"] = intTime()
-            # g["usn"] = self.col.usn()
             self.update(g)
 
     # legacy
@@ -396,10 +391,9 @@ class DeckManager:
         grp["conf"] = id
         self.save(grp)
 
-    # fixme: expensive
     def didsForConf(self, conf) -> List:
         dids = []
-        for deck in list(self.decks.values()):
+        for deck in self.all():
             if "conf" in deck and deck["conf"] == conf["id"]:
                 dids.append(deck["id"])
         return dids
@@ -483,6 +477,9 @@ class DeckManager:
     def update_active(self):
         self.select(self.current()["id"])
 
+    # Parents/children
+    #############################################################
+
     def children(self, did: int) -> List[Tuple[Any, Any]]:
         "All children of did, as (name, id)."
         name = self.get(did)["name"]

qt/aqt/deckconf.py

@@ -103,13 +103,9 @@ class DeckConf(QDialog):
             self.saveConf()
         conf = self.confList[idx]
         self.deck["conf"] = conf["id"]
+        self.mw.col.decks.save(self.deck)
         self.loadConf()
-        cnt = 0
-        for d in self.mw.col.decks.all():
-            if d["dyn"]:
-                continue
-            if d["conf"] == conf["id"]:
-                cnt += 1
+        cnt = len(self.mw.col.decks.didsForConf(conf))
         if cnt > 1:
             txt = _(
                 "Your changes will affect multiple decks. If you wish to "