Method addNewerRevisionsToRevTreeHistory

db/crud.go:3826–3842

addNewerRevisionsToRevTreeHistory will add any newer rev tree id's to the local document history

(newDoc *Document, currentRevIndex int, parent string, docHistory []string)

// addNewerRevisionsToRevTreeHistory will add any newer rev tree id's to the local document history
func (doc *Document) addNewerRevisionsToRevTreeHistory(newDoc *Document, currentRevIndex int, parent string, docHistory []string) (string, error) {
	// currentRevIndex here is the index of the incoming rev tree list to start from.
	for i := currentRevIndex - 1; i >= 0; i-- {
		err := doc.History.addRevision(newDoc.ID,
			RevInfo{
				ID:      docHistory[i],
				Parent:  parent, // set the parent of this revision to the element of docHistory from the last iteration
				Deleted: i == 0 && newDoc.Deleted})

		if err != nil {
			return "", err
		}
		parent = docHistory[i]
	}
	// return last element added from docHistory, this will be the doc's new current rev for writes that are aligning rev tree
	return parent, nil
}

const (
	xattrMacroCas               = "cas"          // SyncData.Cas