mongodb序列

async function _GetDocNo(sequenceName) {
  let recordSequence = entityCollection.getEntity('QCProcessRecordSequence');
  // returnOriginal在版本3.6中已弃用。对于3.6及更高版本,请使用returnDocument: "before" | "after"
  // new: true：最后测试发现用new：true，版本太多了吧
  return recordSequence.Entity.findOneAndUpdate({ key: sequenceName }, { $inc: { sequence: 1 } }, { upsert: true, new: true });
}