MongoDB如何根据我的需求对array<String> desc进行排序？

db.collection_name.aggregate([
  {
    $project: {
      sorted_array: {
        $slice: [
          {
            $map: {
              input: "$array_field",
              as: "item",
              in: {
                item: "$$item",
                index: { $indexOfArray: ["$array_field", "$$item"] }
              }
            }
          },
          { $size: "$array_field" }
        ]
      }
    }
  },
  { $unwind: "$sorted_array" },
  { $sort: { "sorted_array.index": 1 } },
  {
    $group: {
      _id: "$_id",
      sorted_array: { $push: "$sorted_array.item" }
    }
  }
])