如何在 MongoDB 中查询指定日期范围内 meta 字段中 timestampOccur 值的记录？

db.collection.aggregate([
  // 匹配符合条件的记录
  {
    $match: {
      "meta.timestampOccur": {
        $elemMatch: {
          $gte: ISODate("2023-06-18T00:00:00.000Z"),
          $lt: ISODate("2023-06-20T00:00:00.000Z")
        }
      }
    }
  },
  // 展开 meta 对象，方便后续操作
  {
    $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"
      }
    }
  },
  // 将 meta 对象转换为数组，方便后续操作
  {
    $unwind: {
      path: "$meta",
      includeArrayIndex: "metaIndex"
    }
  },
  // 如果 meta.timestampOccur 符合日期范围，则输出记录
  {
    $match: {
      "meta.v.timestampOccur": {
        $elemMatch: {
          $gte: ISODate("2023-06-18T00:00:00.000Z"),
          $lt: ISODate("2023-06-20T00:00:00.000Z")
        }
      }
    }
  },
  // 重新构建 meta 对象
  {
    $group: {
      _id: "$_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"
        }
      }
    }
  },
  // 将 meta 对象转换回原始格式
  {
    $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"
      }
    }
  }
])