Method postWriteUpdateHLV

db/crud.go:3012–3048

(ctx context.Context, doc *Document, casOut uint64)

}

func (db *DatabaseCollectionWithUser) postWriteUpdateHLV(ctx context.Context, doc *Document, casOut uint64) *Document {
	if doc.HLV == nil {
		return doc
	}
	if doc.HLV.Version == expandMacroCASValueUint64 {
		doc.HLV.Version = casOut
	}
	if doc.HLV.CurrentVersionCAS == expandMacroCASValueUint64 {
		doc.HLV.CurrentVersionCAS = casOut
	}
	doc.SyncData.SetCV(doc.HLV)

	// backup new revision to the bucket now we have a doc assigned a CV (post macro expansion) for future deltaSrc purposes
	// we don't need to store revision body backups without delta sync in 4.0, since all clients know how to use the sendReplacementRevs feature
	backupRev := db.deltaSyncEnabled() && db.deltaSyncRevMaxAgeSeconds() != 0
	if db.UseXattrs() && backupRev {
		var newBodyWithAtts = doc._rawBody
		if len(doc.Attachments()) > 0 {
			var err error
			newBodyWithAtts, err = base.InjectJSONProperties(doc._rawBody, base.KVPair{
				Key: BodyAttachments,
				Val: doc.Attachments(),
			})
			if err != nil {
				base.WarnfCtx(ctx, "Unable to marshal new revision body during backupRevisionJSON: doc=%q rev=%q cv=%q err=%v ", base.UD(doc.ID), doc.GetRevTreeID(), doc.HLV.GetCurrentVersionString(), err)
				return doc
			}
		}
		revHash := base.Crc32cHashString([]byte(doc.HLV.GetCurrentVersionString()))
		_ = db.setOldRevisionJSON(ctx, doc.ID, revHash, newBodyWithAtts, doc.IsDeleted(), db.deltaSyncRevMaxAgeSeconds(), doc.getCurrentChannels())
		// Optionally store a lookup document to find the CV-based revHash by legacy RevTree ID
		if db.storeLegacyRevTreeData() {
			_ = db.setOldRevisionJSONPtr(ctx, doc, db.deltaSyncRevMaxAgeSeconds())
		}
	}
	return doc
}

// getAttachmentIDsForLeafRevisions returns a map of attachment docids with values of attachment names.
func getAttachmentIDsForLeafRevisions(ctx context.Context, db *DatabaseCollectionWithUser, doc *Document, newRevID string) (map[string][]string, error) {