Node.js 如何从mongoose 对象内嵌套的数组中提取数组元素

当产品被删除时，我正在try 从用户购物车中删除该产品.

我的用户架构:

const userSchema = new Schema({
    username: { type: String, required: true },
    phone: {
        type: String,
        match: [/\d{10}/, 'Phone number should only 10 have digits'],
    },
    email: {
        type: String,
        match: [/\S+@\S+\.\S+/, 'Email must be valid'],
        required: [true, 'Email must be valid'],
        unique: true,
    },
    password: {
        type: String,
        required: [true, 'Password is not valid'],
    },
    cart: {
        items: [
            {
                productId: {
                    type: Schema.Types.ObjectId,
                    ref: 'Product',
                },
                quantity: {
                    type: Number,
                    max: [10, 'Only 10 quantity of one item can be added.'],
                    required: true,
                },
            },
        ],
        total: { type: Number, default: 0 },
    },
    admin: { type: Boolean, default: false },
    addresses: [addressSchema],
});

我try 使用以下代码从Items数组中删除该项:

await User.updateMany({}, { cart: { $pull: { 'items.productId': id } } });个

但是，这会删除整个购物车对象，而不是单个项目.请谁来帮帮我.