Use backend to set dupe filter

pylib/anki/rsbackend.py

@@ -48,6 +48,8 @@ DeckTreeNode = pb.DeckTreeNode
 StockNoteType = pb.StockNoteType
 FilterToSearchIn = pb.FilterToSearchIn
 NamedFilter = pb.FilterToSearchIn.NamedFilter
+DupeIn = pb.FilterToSearchIn.DupeIn
+BackendNoteTypeID = pb.NoteTypeID
 ConcatSeparator = pb.ConcatenateSearchesIn.Separator
 SyncAuth = pb.SyncAuth
 SyncOutput = pb.SyncCollectionOut

qt/aqt/browser.py

@@ -21,8 +21,10 @@ from anki.lang import without_unicode_isolation
 from anki.models import NoteType
 from anki.notes import Note
 from anki.rsbackend import (
+    BackendNoteTypeID,
     ConcatSeparator,
     DeckTreeNode,
+    DupeIn,
     FilterToSearchIn,
     InvalidInput,
     NamedFilter,
@@ -2016,6 +2018,17 @@ where id in %s"""
     # Edit: finding dupes
     ######################################################################
 
+    # filter called by the editor
+    def search_dupe(self, mid: int, text: str):
+        self.form.searchEdit.lineEdit().setText(
+            self.col.backend.filter_to_search(
+                FilterToSearchIn(
+                    dupe=DupeIn(mid=BackendNoteTypeID(ntid=mid), text=text)
+                )
+            )
+        )
+        self.onSearchActivated()
+
     def onFindDupes(self):
         self.editor.saveNow(self._onFindDupes)
 

qt/aqt/editor.py

@@ -537,12 +537,8 @@ class Editor:
         self.web.eval("setBackgrounds(%s);" % json.dumps(cols))
 
     def showDupes(self):
-        contents = self.note.fields[0].replace('"', r"\"")
         browser = aqt.dialogs.open("Browser", self.mw)
-        browser.form.searchEdit.lineEdit().setText(
-            '"dupe:%s,%s"' % (self.note.model()["id"], contents)
-        )
-        browser.onSearchActivated()
+        browser.search_dupe(self.note.model()["id"], self.note.fields[0])
 
     def fieldsAreBlank(self, previousNote=None):
         if not self.note: