小编Gou*_*sia的帖子

我有批量收集的数据,如下所示:

[
  {
    "_id": "58d21104a2b6940fd99db632",
    "username": "58d18698669fd20ea0b81720",
    "batchname": "dynamic",
    "time": "21:20",
    "activityname": "dance",
    "eventtype": "demo",
    "duration": 50,
    "price": "120$",
    "__v": 0,
    "trainer": [
      {
        "trainername": "ramu",
        "_id": "58d21104a2b6940fd99db633"
      }
    ]
  },
  {
    "_id": "58d226eb5f73f7150ffc3181",
    "username": "58d18698669fd20ea0b81721",
    "batchname": "spck",
    "time": "21:20",
    "activityname": "dance",
    "eventtype": "demo",
    "duration": 50,
    "price": "120$",
    "__v": 0,
    "trainer": []
  },
  {
    "_id": "58d22745079e481533f23bbe",
    "username": "58d18698669fd20ea0b81721",
    "batchname": "spctygytgyk",
    "time": "21:20",
    "activityname": "music",
    "eventtype": "demo",
    "duration": 50,
    "price": "120$",
    "__v": 0,
    "trainer": [
      {
        "trainername": "siva",
        "_id": "58d22745079e481533f23bbf"
      } …