需求：生成可将指定输入JSON转换为目标输出的JOLT规格

输入示例 #

{
  "extraPersonCharge": 50,
  "inventoryTypes": {
    "KDXN": [
      {
        "name": "Standard Room",
        "price": 100
      },
      {
        "name": "Deluxe Room",
        "price": 150
      }
    ],
    "KLON": [
      {
        "name": "Single Bed",
        "price": 80
      }
    ]
  }
}

期望输出示例 #

{
  "inventoryTypes": {
    "codes": [
      {
        "code": "KDXN",
        "name": "Standard Room",
        "price": 100
      },
      {
        "code": "KDXN",
        "name": "Deluxe Room",
        "price": 150
      },
      {
        "code": "KLON",
        "name": "Single Bed",
        "price": 80
      }
    ]
  }
}

JOLT转换规格 #

[
  {
    "operation": "shift",
    "spec": {
      "inventoryTypes": {
        "*": {
          "*": {
            "@": "&3.codes[]",
            "$2": "&3.codes[&1].code"
          }
        }
      }
    }
  }
]

规格说明 #

• 移除extraPersonCharge字段：通过shift操作中不指定该字段的映射规则，自动忽略该字段
• 动态生成codes数组：
  • inventoryTypes.*匹配原结构中inventoryTypes下的所有动态键（如KDXN、KLON）
  • 内层*遍历每个键对应的数组元素
  • @将当前数组元素的所有属性映射到inventoryTypes.codes数组中
  • $2引用上层动态键的值，作为当前元素的code字段，&3确保路径回到inventoryTypes，&1对应数组元素的索引，保证每个元素匹配正确的code值

内容的提问来源于stack exchange，提问作者Optimizer