如何使用node.js在mongoDB中的节点内检索数组？

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我有一个名为“用户”的mongoDB集合。在“用户”集合中有多个用户。每个用户都有一个名为“购物车”的数组，并且购物车内有类似这样的项目，

enter image description here

现在，我想通过提供用户的ID（_id）来检索用户的所有“购物车”详细信息（或对象）。 我以这种方式尝试过，但抛出异常

router.get('/getCart', (req, res, next) => {

    console.log(req.body.userId)
    User.findOne({_id: req.body.userId}
    ,(err, userInfo) => {
        userInfo.Cart.find({}, (err, result) => {
            if (err) return next(err);

            let cart = {
                status: 'success',
                code: 200,
                data : result
            };

            res.json(cart);
        })
    })
});

例外

TypeError: #<Object> is not a function
    at CoreMongooseArray.find (<anonymous>)
    at /Users/applefactory/WebstormProjects/OnlineFashionStore/src/UserBackend/src/routes/cart.js:58:23
    at /Users/applefactory/WebstormProjects/OnlineFashionStore/src/UserBackend/node_modules/mongoose/lib/model.js:4837:16
    at /Users/applefactory/WebstormProjects/OnlineFashionStore/src/UserBackend/node_modules/mongoose/lib/query.js:4391:12
    at /Users/applefactory/WebstormProjects/OnlineFashionStore/src/UserBackend/node_modules/mongoose/lib/query.js:2869:28
    at processTicksAndRejections (internal/process/task_queues.js:79:11)
Emitted 'error' event on Function instance at:
    at /Users/applefactory/WebstormProjects/OnlineFashionStore/src/UserBackend/node_modules/mongoose/lib/model.js:4839:13
    at /Users/applefactory/WebstormProjects/OnlineFashionStore/src/UserBackend/node_modules/mongoose/lib/query.js:4391:12
    at /Users/applefactory/WebstormProjects/OnlineFashionStore/src/UserBackend/node_modules/mongoose/lib/query.js:2869:28
    at processTicksAndRejections (internal/process/task_queues.js:79:11)

我该如何解决这个问题？还是有其他方法可以做到这一点？提前致谢！

   ------------------------------ UPDATE --------------------------------------

这是我的用户模型

const UserSchema = new mongoose.Schema({
    username: {
        type: String,
        validate: {
            validator: username => User.doesNotExist({username}),
            message: "Username already exists"
        }
    },

    email: {
        type: String,
        validate: {
            validator: email => User.doesNotExist({email}),
            message: "Email already exists"
        }
    },

    password: {
        type: String,
        required: true
    },

    Cart : {
        type: Array,
        default: []
    },

    WishList : {
        type : Array,
        default: []
    },
},{timestamps: true});

    UserSchema.pre('save', function () {
        if(this.isModified('password')){
            this.password = hashSync(this.password, 10);
        }
    });

    UserSchema.statics.doesNotExist = async function (field) {
        return await this.where(field).countDocuments() === 0;
    };

    UserSchema.methods.comparePasswords = function (password) {
        return compareSync(password, this.password);
    };

    const User = mongoose.model("User", UserSchema);
    export default User;