Method setOldRevisionJSONPtr

db/revision_old.go:48–59

setOldRevisionJSONPtr stores a pointer from the old revision's RevTreeID to the Current Version hash used to fetch the body.

(ctx context.Context, doc *Document, expiry uint32)

// setOldRevisionJSONPtr stores a pointer from the old revision's RevTreeID to the Current Version hash used to fetch the body.
func (db *DatabaseCollectionWithUser) setOldRevisionJSONPtr(ctx context.Context, doc *Document, expiry uint32) error {
	ptrKey := oldRevisionKey(doc.ID, doc.GetRevTreeID())
	revHash := base.Crc32cHashString([]byte(doc.HLV.GetCurrentVersionString()))
	ptrBytes := withNonJSONPrefix(nonJSONPrefixKindRevPtr, []byte(revHash))
	err := db.dataStore.SetRaw(ptrKey, expiry, nil, ptrBytes)
	if err == nil {
		base.DebugfCtx(ctx, base.KeyCRUD, "Backed up revision body legacy RevTree ID pointer %q -> %q/%q (%d bytes, ttl:%d)", doc.GetRevTreeID(), base.UD(doc.ID), revHash, len(ptrBytes), db.deltaSyncRevMaxAgeSeconds())
	} else {
		base.WarnfCtx(ctx, "Failed to write legacy rev pointer for %q rev %q: %v", base.UD(doc.ID), doc.GetRevTreeID(), err)
	}
	return err
}