Bug 178380

Summary:	IndexedDB index cursor stops when updating an object
Product:	WebKit	Reporter:	David Fahlander <david.fahlander>
Component:	WebCore Misc.	Assignee:	Nobody <webkit-unassigned>
Status:	RESOLVED CONFIGURATION CHANGED
Severity:	Normal	CC:	bfulgham, icewil, sihui_liu, webkit-bug-importer
Priority:	P2	Keywords:	InRadar
Version:	Safari 11
Hardware:	Unspecified
OS:	All
URL:	http://dexie.org/test/dexie-issue-594/index.html

Description David Fahlander 2017-10-17 00:41:53 PDT

Steps to reproduce:

1. Opening a cursor on an index (IDBIndex.prototype.openCursor())
2. req.onsuccess: call cursor.update() or store.put() 
3. Next req.onsuccess indicates end of iteration (req.result is falsy)

Expected behavior:

...
3. Next req.onsuccess lands on the next object matched in the index.

Note: There seems not to be an issue for IDBObjectStore.prototype.openCursor(), it's just IDBIndex that fails.

Repro: http://dexie.org/test/dexie-issue-594/index.html

The repro should show:
  3
  3

But with Safari 10 or 11, it shows
  3
  1

The reason the last digit is 1, is because a call to Dexie.Collection.modify() will stop after first match, as it calls cursor.update() on it.

Comment 1 David Fahlander 2017-10-17 00:43:22 PDT

Original issue: https://github.com/dfahlander/Dexie.js/issues/594

Comment 2 Radar WebKit Bug Importer 2022-02-01 11:28:07 PST

<rdar://problem/88339506>

Comment 3 Brent Fulgham 2022-02-01 11:31:31 PST

This appears to be working properly in current Safari/WebKit.