mongodb與貓鼬;更新

Question

中的1個文檔時出現問題謝謝您的關注。

這裏是我的代碼：

從型號/ 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); 

---

從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); 
    }); 
}); 

我得到的錯誤是undefined is not a function就在購物車。 findByIdAndUpdate和購物車日誌爲{ products: [], _id: 56b3b9fcd13a19a87bddd5f3 }。

Answer 1

嘗試刪除或註釋該行：//var cart = model.Cart(); 和替換cart與model上線cart.findByIdAndUpdate(......)爲好。