猫鼬子数组中的大量子文档

Question

给出以下我正在尝试的文件，以填充数组中的所有子文件。 我是新来的。猫鼬，所以也许我在创建文档时出错， 正确填充了executionTypeModel和roundModel，但未填充子文档exerciseType。

    const workout = mongoose.Schema({
        name: {
            type: String,
            required: 'Please enter the name of the workout',
            unique: true
        },
        workoutTypeId: { type: mongoose.Schema.Types.ObjectId, ref: 'WorkoutType' },
        rounds: [{ type: mongoose.Schema.Types.ObjectId, ref: 'Round' }]
    }, { timestamps: true });

const workoutTypeModel = mongoose.Schema({ name: { type: String } }, { timestamps: true });

const roundModel = mongoose.Schema({
    repets: { type: Number, max: 1000 },
    exercises: { type: mongoose.Schema.Types.Array, ref: 'Exercise' }
}, { timestamps: true });

const exerciseModel = mongoose.Schema({
    repets: { type: Number, max: 1000 },
    exerciseType: { type: mongoose.Schema.Types.ObjectId, ref: 'ExerciseType' }
},
    { timestamps: true });

const exerciseTypeModel = mongoose.Schema({
    name: {
        type: String,
        required: '{PATH} is required!'
    },
}, { timestamps: true });

这是控制器代码：

async index(req, res) {
        const workouts = await Workout.find()
            .populate({ path: 'workoutTypeId' })
            .populate({ path: 'rounds', populate: 'exercises exerciseType' })
        res.send(workouts);
    }

预先感谢