如何使用 MongoDB 聚合管道查询指定日期范围内的 meta 字段 timestampOccur？

db.collection.aggregate([
  {
    $match: {
      "meta.timestampOccur": {
        $elemMatch: {
          $gte: ISODate("2023-06-18T00:00:00.000Z"),
          $lt: ISODate("2023-06-20T00:00:00.000Z")
        }
      }
    }
  },
  {
    $project: {
      _id: 1,
      campaign: 1,
      status: 1,
      workflow: 1,
      user: 1,
      basic: 1,
      type: 1,
      createdAt: 1,
      updatedAt: 1,
      tag: 1,
      code: 1,
      meta: {
        $objectToArray: "$meta"
      }
    }
  },
  {
    $unwind: {
      path: "$meta",
      includeArrayIndex: "metaIndex"
    }
  },
  {
    $match: {
      "meta.v.timestampOccur": {
        $elemMatch: {
          $gte: ISODate("2023-06-18T00:00:00.000Z"),
          $lt: ISODate("2023-06-20T00:00:00.000Z")
        }
      }
    }
  },
  {
    $group: {
      _id: "$_id",
      campaign: { $first: "$campaign" },
      status: { $first: "$status" },
      workflow: { $first: "$workflow" },
      user: { $first: "$user" },
      basic: { $first: "$basic" },
      type: { $first: "$type" },
      createdAt: { $first: "$createdAt" },
      updatedAt: { $first: "$updatedAt" },
      tag: { $first: "$tag" },
      code: { $first: "$code" },
      meta: {
        $push: {
          k: "$meta.k",
          v: "$meta.v"
        }
      }
    }
  },
  {
    $project: {
      _id: 1,
      campaign: 1,
      status: 1,
      workflow: 1,
      user: 1,
      basic: 1,
      type: 1,
      createdAt: 1,
      updatedAt: 1,
      tag: 1,
      code: 1,
      meta: {
        $arrayToObject: "$meta"
      }
    }
  }
])