对象数组的猫鼬图

Question

我正在学习mongodb和mongoose，但我不知道如何使用此模式：

mongoose.Schema({
  laps: {
    type: Map,
    of: [{type: ObjectId, ref:'Lap'}]
  }
}, {collection: 'xxx'});

我试图像这样推动数组：

this.laps.set(key, (this.laps.get(key)).push(mongoose.Types.ObjectId(newLap._id)));

Map { '5bd1b3bfbef1001d64de6697' => ["5c0a3c0456be700670ed093b"] }

每次我尝试保存模型时，都会出现此错误：

validation failed: laps.5bd1b3bfbef1001d64de6697: Cast to [ObjectId] failed for value "[1]" at path "laps.$*"

我被困在那里