基于嵌套值从哈希数组中清除哈希

我遇到了一个有趣的情况。如果哈希数组中的某个特定值是重复的,我想从该数组中删除该值。下面是我正在使用的结构的一个例子:

[
  {
    "PCDBPart": {
      "Category": {
        "ID": 22,
        "Name": "Wiper and Washer"
      }
    },
    "Position": {
      "Name": "Right",
      "PCDBPositionID": 12,
      "PositionID": 10
    }
  },
  {
    "PCDBPart": {
      "Category": {
        "ID": 22,
        "Name": "Wiper and Washer"
      }
    },
    "Position": {
      "Name": "Right",
      "PCDBPositionID": 12,
      "PositionID": 10
    }
  },
  {
    "PCDBPart": {
      "Category": {
        "ID": 24,
        "Name": "Wiper and Washer"
      }
    },
    "Position": {
      "Name": "Right",
      "PCDBPositionID": 2,
      "PositionID": 4
    }
  }
]

我的问题是 Position 经常重复,使数组变大。我想返回一个数组,该数组的哈希值由 PositionID 它们包含。

我试着用 my_array.uniq { |h| h.dig(:Position, :PositionID)} ,但这似乎只返回了一个值:

[
  {
    "PCDBPart": {
      "Category": {
        "ID": 22,
        "Name": "Wiper and Washer"
      }
    },
    "Position": {
      "Name": "Right",
      "PCDBPositionID": 12,
      "PositionID": 10
    }
  },
]

以下是所需的输出:

[
  {
    "PCDBPart": {
      "Category": {
        "ID": 22,
        "Name": "Wiper and Washer"
      }
    },
    "Position": {
      "Name": "Right",
      "PCDBPositionID": 12,
      "PositionID": 10
    }
  },
  {
    "PCDBPart": {
      "Category": {
        "ID": 24,
        "Name": "Wiper and Washer"
      }
    },
    "Position": {
      "Name": "Right",
      "PCDBPositionID": 2,
      "PositionID": 4
    }
  }
]

有人对如何进行有什么建议吗?