Mongoose防止保存两张单据和子单据

const mongoose = require('mongoose');

// 定义子单据模型
const subDocumentSchema = new mongoose.Schema({
  // 子单据的字段定义
});

// 定义单据模型
const documentSchema = new mongoose.Schema({
  // 单据的字段定义
  subDocuments: [subDocumentSchema], // 子单据的引用
});

const Document = mongoose.model('Document', documentSchema);

const subDocumentSchema = new mongoose.Schema({
  // 子单据的字段定义
  field1: {
    type: String,
    required: true,
  },
  // ...
});

const documentSchema = new mongoose.Schema({
  // 单据的字段定义
  field1: {
    type: String,
    required: true,
  },
  subDocuments: [subDocumentSchema], // 子单据的引用
});

const session = await mongoose.startSession();
session.startTransaction();

try {
  // 创建单据
  const document = new Document({
    // 单据的字段赋值
  });

  // 创建子单据
  const subDocument = {
    // 子单据的字段赋值
  };

  // 将子单据添加到单据中
  document.subDocuments.push(subDocument);

  // 保存单据和子单据
  await document.save({ session });
  await subDocument.save({ session });

  await session.commitTransaction();
  session.endSession();
} catch (error) {
  await session.abortTransaction();
  session.endSession();
  throw error;
}