getSnapshot and latestVersion are not sync

[Benjamin-Yu-Sheng-Chang]

The results from the versionFromSnapshot query and the latest version query are identical before a manual snapshot is submitted. However, after executing them multiple times, their results diverge.

I know this is related to Convex query caching. I’m not certain if this is the intended behavior or a bug. It will be nice if someone can briefly explain why the result diverges.

Here is the code

export const parentAdaptSnapshot = async (
  ctx: AuthMutationCtx,
  parentResolutionId: ResolutionId,
  resolutionId: ResolutionId,
) => {
  const snapshot = await ctx.runQuery(
    api.components.resolutionProsemirror.getSnapshot,
    { id: resolutionId },
  );

  if (!snapshot.content) throw new ConvexError("Snapshot not found");

  const parentSnapshot = await ctx.runQuery(
    api.components.resolutionProsemirror.getSnapshot,
    { id: parentResolutionId },
  );

  const incorrectParentVersion = await ctx.runQuery(
    components.resolutionProsemirrorSync.lib.latestVersion,
    { id: parentResolutionId },
  );

  console.log("parentSnapshot", parentSnapshot.version);

  console.log("incorrectParentVersion", incorrectParentVersion);

  if (!parentSnapshot.content)
    throw new ConvexError("Parent snapshot not found");

  const newParentVersion = (parentSnapshot as { version: number }).version + 1;

  await ctx.runMutation(
    components.resolutionProsemirrorSync.lib.submitSnapshot,
    {
      id: parentResolutionId,
      version: newParentVersion,
      content: snapshot.content,
    },
  );

  return snapshot;
};

8/14/2025, 6:58:18 PM [CONVEX M(fn/resolutions/state:declareVoteResult)] [LOG] 'parentSnapshot' 12
8/14/2025, 6:58:18 PM [CONVEX M(fn/resolutions/state:declareVoteResult)] [LOG] 'incorrectParentVersion' 12
8/14/2025, 6:58:38 PM [CONVEX M(fn/resolutions/state:declareVoteResult)] [LOG] 'parentSnapshot' 13
8/14/2025, 6:58:38 PM [CONVEX M(fn/resolutions/state:declareVoteResult)] [LOG] 'incorrectParentVersion' 12

[ianmacartney]

Submitting your own snapshot without an associated delta is not supported right now - there's talks in another thread to handle that by replacing the content on each client and blowing away changes, but the suggested flow is to provide the delta / step instead, and have it handle the snapshotting internally. Ideally there'd be something that computed the minimal delta - maybe prosemirror/tiptap already has that

…

On Thu, Aug 14, 2025 at 4:08 PM Benjamin-Yu-Sheng-Chang < ***@***.***> wrote: *Benjamin-Yu-Sheng-Chang* created an issue (get-convex/prosemirror-sync#114) <#114> The results from the versionFromSnapshot query and the latest version query are identical before a manual snapshot is submitted. However, after executing them multiple times, their results diverge. I know this is related to Convex query caching. I’m not certain if this is the intended behavior or a bug. It will be nice if someone can briefly explain why the result diverges. Here is the code export const parentAdaptSnapshot = async ( ctx: AuthMutationCtx, parentResolutionId: ResolutionId, resolutionId: ResolutionId,) => { const snapshot = await ctx.runQuery( api.components.resolutionProsemirror.getSnapshot, { id: resolutionId }, ); if (!snapshot.content) throw new ConvexError("Snapshot not found"); const parentSnapshot = await ctx.runQuery( api.components.resolutionProsemirror.getSnapshot, { id: parentResolutionId }, ); const incorrectParentVersion = await ctx.runQuery( components.resolutionProsemirrorSync.lib.latestVersion, { id: parentResolutionId }, ); console.log("parentSnapshot", parentSnapshot.version); console.log("incorrectParentVersion", incorrectParentVersion); if (!parentSnapshot.content) throw new ConvexError("Parent snapshot not found"); const newParentVersion = (parentSnapshot as { version: number }).version + 1; await ctx.runMutation( components.resolutionProsemirrorSync.lib.submitSnapshot, { id: parentResolutionId, version: newParentVersion, content: snapshot.content, }, ); return snapshot;}; 8/14/2025, 6:58:18 PM [CONVEX M(fn/resolutions/state:declareVoteResult)] [LOG] 'parentSnapshot' 12 8/14/2025, 6:58:18 PM [CONVEX M(fn/resolutions/state:declareVoteResult)] [LOG] 'incorrectParentVersion' 12 8/14/2025, 6:58:38 PM [CONVEX M(fn/resolutions/state:declareVoteResult)] [LOG] 'parentSnapshot' 13 8/14/2025, 6:58:38 PM [CONVEX M(fn/resolutions/state:declareVoteResult)] [LOG] 'incorrectParentVersion' 12 — Reply to this email directly, view it on GitHub <#114>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AACZQW5PHMABUH6UEQGRECT3NUJH3AVCNFSM6AAAAACD6EFDM6VHI2DSMVQWIX3LMV43ASLTON2WKOZTGMZDGOBTGY3TGOI> . You are receiving this because you are subscribed to this thread.Message ID: ***@***.***>