猫鼬与猫鼬; 在更新1个文档时遇到麻烦

Question

感谢您的关注。

这是我的代码：

来自models / Cart.js

var mongoose = require('mongoose');

var CartSchema = mongoose.Schema({
    owner: {type: mongoose.Schema.Types.ObjectId, ref: 'User'},
    products: [ {type: mongoose.Schema.Types.ObjectId, ref: 'Product', quantity:     Number} ],
    created: Date,
    updated: Date
});


exports.Cart = mongoose.model('Cart', CartSchema);

---

来自cart.js

var model = require('../models/Cart');
//modify a cart
router.post('/update/:id', function(req, res, next){
  var cart = model.Cart();
  console.log(cart);
  cart.findByIdAndUpdate(req.params.id, {
    products: req.body.products,
    updated: moment().format()
  }, {new:true}, function(err, result){
    if(err) throw err;
    res.status(200).send(result);
  });
});

我得到的错误undefined is not a function在cart.findByIdAndUpdate上undefined is not a function ，也不是将购物车日志记录为{ products: [], _id: 56b3b9fcd13a19a87bddd5f3 } 。

Answer 1

尝试通过删除或注释以下行： //var cart = model.Cart(); 并将cart替换为cart.findByIdAndUpdate(......)行上的model 。