mongoref在資料庫中回傳null？-有解無憂

我正在使用 MERN 堆疊進行反應專案。在資料庫中創建收藏夾物件時，userFrom 回傳 null。雖然一切都存在。在用戶模型中，我沒有將角色參考到用戶的問題。我嘗試從用戶中洗掉對角色模型的參考并再次嘗試，但我仍然遇到同樣的問題。

收藏模型

const mongoose = require('mongoose');

const Favourite = mongoose.model(
    "Favourite",
    new mongoose.Schema({
        movieId : String,
        movieTitle: String,
        movieImg: String,
        userFrom:[
            {
                type: mongoose.Schema.Types.ObjectId,
                ref: "User"
            }
        ]
    })

)

用戶模型

const mongoose = require("mongoose");

const User = mongoose.model(
  "User",
  new mongoose.Schema({
    username: String,
    email: String,
    password: String,
    roles: [
      {
        type: mongoose.Schema.Types.ObjectId,
        ref: "Role"
      }
    ]
  })
);

module.exports = User;

榜樣

const mongoose = require("mongoose");

const Role = mongoose.model(
  "Role",
  new mongoose.Schema({
    name: String
  })
);

module.exports = Role;

最喜歡的路線

const express =  require('express');
const router = express.Router();
const { authJwt } = require("../middlewares");
const Favourite = require("../models/favourite.model");

    router.use(function(req, res, next) {
      res.header(
        "Access-Control-Allow-Headers",
        "x-access-token, Origin, Content-Type, Accept"
      );
      next();
});


router.post("/favouriteNumber", [authJwt.verifyToken], (req, res) => {
    Favourite.find({"movieId": req.body.movieId})
        .exec((err, favourite) => {
            if(err) return res.status(400).send(err)
            res.status(200).json({success: true, favouriteNumber: favourite.length})
        })
})

router.post("/favourited", [authJwt.verifyToken], (req, res) => {
    Favourite.find({"movieId": req.body.movieId, "userFrom": req.body.userFrom})
        .exec((err, favourite) => {
            if(err) return res.status(400).send(err) 

            let result = false;
            if(favourite.length !== 0) {
                result = true
            }

            res.status(200).json({success: true, favourited: result});


        })
})

router.post("/addToFavourite", [authJwt.verifyToken], (req, res) => {
    
    const favourite = new Favourite(req.body)

    favourite.save((err, doc) => {
        if(err) return res.json({success: false, err})
        return res.status(200).json({success: true, doc})
    })
})

router.post("/removeFavorite", [authJwt.verifyToken], (req, res) => {
    
    Favourite.findOneAndDelete({movieId: req.body.movieId, userFrom: req.body.userFrom})
        .exec((err, doc) => {
            if(err) return res.json({success: false, err})
            return res.status(200).json({success: true, doc})
        })
})
module.exports = router;

uj5u.com熱心網友回復：

創建用戶時，您不會將用戶添加到收藏夾中。如果您使用的是 express-jwt，那么您可以使用 req.user 輕松完成：

router.post("/addToFavourite", [authJwt.verifyToken], (req, res) => {
    req.body.userFrom = req.user._id
    const favourite = new Favourite(req.body)

    favourite.save((err, doc) => {
        if(err) return res.json({success: false, err})
        return res.status(200).json({success: true, doc})
    })
})

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標籤：节点.js mongodb 表示猫鼬猫鼬模式

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