Question

我正在更新从Model.create（）到Model.insertMany（）的路由

但是在insterMany（）之后尝试关联ref给我一个错误

我在Program.js中有一个带有优惠券参考的程序模型：

const ProgramSchema = new mongoose.Schema({
  name: {
    type: String,
    required: true
  },
  imageUrl: {
    type: String
  },
  url: {
    type: String,
    required: true
  },
  partner: {
    type: String,
    required: true
  },
  coupon: [
    {
      type: mongoose.Schema.Types.ObjectId,
      ref: 'coupon'
    }
  ]
});

module.exports = Program = mongoose.model('program', ProgramSchema);

Coupon.js中的优惠券模型：

const CouponSchema = new mongoose.Schema({
  number: {
    type: String,
    required: true
  }
});

module.exports = Coupon = mongoose.model('coupon', CouponSchema);

最初是我的路线：

// @route   POST /:id/coupon
// @desc    Generate new random coupons for a particular program
// @access  Private
router.post('/:id/coupon', (req, res) => {

  Program.findById(req.params.id, (err, program) => {
    if (err) {
      console.error(err);
    } else {
      // Get the number of coupons to generate
      let couponNum = req.body.number;
      // Generate coupons 
      let couponsData = generateCoupons(couponNum);
      // Create as many coupons is passed in the request
      Coupon.insertMany(couponsData, (err, coupons) => {
        if (err) {
          console.error(err);
        } else {
          console.log(coupons);
          // connect newlly created coupons to Program model
          program.coupon.push(coupons);
          console.log(program);
          program.save();
          res.redirect('/programs/' + program._id); // redirect to the program page
        }
      });
    }
  });
});

输出（将优惠券添加到优惠券模型中的数据库中，而不是添加到程序模型中，并返回此错误）：

CastError: Cast to ObjectId failed for value "[ { _id: 5c9a339acc2ea92fa0f5293e,
    number: '4B7FE4C90FE942E7',
    __v: 0 },
  { _id: 5c9a339acc2ea92fa0f5293f,
    number: 'E67B454B2CEE45CE',
    __v: 0 },
  { _id: 5c9a339acc2ea92fa0f52940,
    number: 'EFDB1E7FE4CC470C',
    __v: 0 },
  { _id: 5c9a339acc2ea92fa0f52941,
    number: '913BA9747957470C',
    __v: 0 },
  { _id: 5c9a339acc2ea92fa0f52942,
    number: '5DC51728E5F04512',
    __v: 0 } ]" at path "coupon"

在搜索过猫鼬的文档之后，findByIdAndUpdate（）解决了该错误，但是新的优惠券替换了那些已经存在的优惠券，这不是预期的行为。我希望添加它而不覆盖已经存在的那些

新代码：

// @route   POST /:id/coupon
// @desc    Generate new random coupons for a particular program
// @access  Private
router.post('/:id/coupon', (req, res) => {
  Program.findById(req.params.id, (err, program) => {
    if (err) {
      console.error(err);
    } else {
      // Get the number of coupons to generate
      let couponNum = req.body.number;
      // Generate coupons
      let couponsData = generateCoupons(couponNum);
      // Create as many coupons is passed in the request
      Coupon.insertMany(couponsData, (err, coupons) => {
        if (err) {
          console.error(err);
        } else {
          console.log(coupons);
          // connect newlly created coupons to Program model
          Program.findByIdAndUpdate(
            program._id,
            { coupon: coupons },
            (err, program) => {
              if (err) {
                console.error(err);
              } else {
                console.log(program.coupon);
              }
            }
          );
          res.redirect('/programs/' + program._id); // redirect to the program page
        }
      });
    }
  });
});

输出（没有错误，已成功添加，但覆盖了现有的优惠券）：

[ { _id: 5c9a379c5cace31c289e2c40,
    number: '7E29798D4AB34C31',
    __v: 0 },
  { _id: 5c9a379c5cace31c289e2c41,
    number: 'D973E23A4E9D46F2',
    __v: 0 },
  { _id: 5c9a379c5cace31c289e2c42,
    number: '6D50BBB802524EAB',
    __v: 0 },
  { _id: 5c9a379c5cace31c289e2c43,
    number: '8D78C0A05ADB4AA0',
    __v: 0 },
  { _id: 5c9a379c5cace31c289e2c44,
    number: 'CDC4C282E2C648CD',
    __v: 0 } ]

那么在insertMany（）查询之后关联引用的最佳方法是什么？谢谢您的宝贵时间。

在insertMany（）之后如何关联架构引用

0 个答案: