mirror/crumbs-original
1
0
Fork 1
mirror of https://github.com/bretzel-app/crumbs.git synced 2026-10-12 20:06:57 +02:00
Code Issues Packages Projects Releases Wiki Activity

fix: prevent 3-way merge from reverting sequential single-user edits

Browse Source 
The server's 3-way content merge was incorrectly triggering on sequential
edits by the same user. When a user checked then unchecked a checklist
item, the merge saw local === base (both unchecked) and kept the server's
checked state, silently discarding the uncheck.

Now the merge only runs when there's an actual concurrent edit
(baseVersion < existing.version), meaning another user saved between the
client's load and this save. For single-user sequential edits, the
client's content is used directly.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
This commit is contained in:
Frederic Cabassut
2026-03-22 18:51:14 +01:00
co-authored by Claude Opus 4.6
parent 6eb35e9df2
commit 5a2a63e2bb
2 changed files with 39 additions and 15 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/lib/server/notes-service.ts
+14 -15
View File
@@ -238,21 +238,20 @@ export function updateNote(db: Db, userId: number, id: string, input: UpdateNote
if (input.title !== undefined) { sharedUpdates.title = input.title; hasSharedUpdates = true; }
if (input.content !== undefined) {
// 3-way merge to preserve concurrent edits from other users
if (input.content !== existing.content) {
const baseSnapshot = input.baseVersion !== undefined
? db.select({ content: noteVersions.content })
.from(noteVersions)
.where(and(eq(noteVersions.noteId, id), lte(noteVersions.version, input.baseVersion)))
.orderBy(desc(noteVersions.version))
.limit(1)
.get()
: db.select({ content: noteVersions.content })
.from(noteVersions)
.where(eq(noteVersions.noteId, id))
.orderBy(desc(noteVersions.version))
.limit(1)
.get();
// 3-way merge to preserve concurrent edits from other users.
// Only attempt merge when there's a concurrent edit: the client's
// baseVersion is behind the current version, meaning someone else
// saved between the client's load and this save.
const hasConcurrentEdit = input.baseVersion !== undefined
&& input.baseVersion < existing.version;
if (hasConcurrentEdit && input.content !== existing.content) {
const baseSnapshot = db.select({ content: noteVersions.content })
.from(noteVersions)
.where(and(eq(noteVersions.noteId, id), lte(noteVersions.version, input.baseVersion!)))
.orderBy(desc(noteVersions.version))
.limit(1)
.get();
if (baseSnapshot && baseSnapshot.content !== existing.content) {
sharedUpdates.content = mergeContent(baseSnapshot.content, input.content, existing.content);