FetchDocument与子文档，猫鼬nodejs

Question

我想获取所有带有子文档嵌套数组的文档。在mongodb中怎么办？

[
    {
      "_id": "5f2baa334d1a021d2126c5c7",
      "mode": "TEST",
      "title": "RAPID_TEST",
      "sequence": 1,
      "workouts": {
        "_id": "5f2baa334d1a021d2126c5c8",
        "detail": "5f2ba9f99699c11cfa02e8be",
        "duration": 30,
        "sequence": 1
      },
      "totalDuration": 60,
      "__v": 0
    },
    {
      "_id": "5f2baa334d1a021d2126c5c7",
      "mode": "TEST",
      "title": "RAPID_TEST",
      "sequence": 1,
      "workouts": {
        "_id": "5f2baa334d1a021d2126c5c9",
        "detail": "5f2baa01b7e0e01d01cbcccb",
        "duration": 30,
        "sequence": 2
      },
      "totalDuration": 60,
      "__v": 0
    }
  ]

使用 entity.find（）或** entity.aggreate（[{$ unwind：{路径：“ $ subdocAttribute”}}}]）。给我以上结果。