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物流轨迹：解释 shipments 首部插入导致的多处差异

数组按下标逐项比较。在 shipments 开头插入记录后，后续元素位置移动，会产生多处修改和一个尾部新增；这不等于多条业务记录都发生了真实字段变更。需要按 ID 配对时应先在自己的业务逻辑中处理。

浏览器本地处理合成数据同场景 32 个案例 ↗
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示例工作台

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JSON 结构对比修改下方数据后重新运行
运行结果
[
  {
    "op": "replace",
    "path": "/data/shipments/0/shipmentId",
    "oldValue": "demo-shipments-1",
    "value": "demo-inserted"
  },
  {
    "op": "replace",
    "path": "/data/shipments/0/description",
    "oldValue": "演示包裹甲",
    "value": "新增演示记录"
  },
  {
    "op": "replace",
    "path": "/data/shipments/1/shipmentId",
    "oldValue": "demo-shipments-2",
    "value": "demo-shipments-1"
  },
  {
    "op": "replace",
    "path": "/data/shipments/1/description",
    "oldValue": "演示包裹乙",
    "value": "演示包裹甲"
  },
  {
    "op": "replace",
    "path": "/data/shipments/1/weightGrams",
    "oldValue": 1200,
    "value": 500
  },
  {
    "op": "replace",
    "path": "/data/shipments/1/signed",
    "oldValue": false,
    "value": true
  },
  {
    "op": "replace",
    "path": "/data/shipments/1/state",
    "oldValue": "delivered",
    "value": "in_transit"
  },
  {
    "op": "replace",
    "path": "/data/shipments/1/tracking/checkpoints/0",
    "oldValue": "已签收",
    "value": "已揽收"
  },
  {
    "op": "add",
    "path": "/data/shipments/1/tracking/checkpoints/1",
    "value": "运输中"
  },
  {
    "op": "replace",
    "path": "/data/shipments/1/tracking/carrier",
    "oldValue": "demo-B",
    "value": "demo-A"
  },
  {
    "op": "add",
    "path": "/data/shipments/2",
    "value": {
      "shipmentId": "demo-shipments-2",
      "description": "演示包裹乙",
      "weightGrams": 1200,
      "signed": false,
      "state": "delivered",
      "tracking": {
        "checkpoints": [
          "已签收"
        ],
        "carrier": "demo-B"
      }
    }
  }
]

原例已核验，可修改输入后重新运行。

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01

场景与操作说明

物流标识、重量和轨迹列表分别表达关联、计量和事件顺序。此案例不查询真实物流，轨迹顺序按样本保留。

weightGrams 使用克，不能与千克字段直接按数值比较。

  1. 核对 物流轨迹 的字段层级，保留 shipmentId 的字符串类型。
  2. 修改一项输入并运行，观察结果中的值或路径如何变化。
  3. 载入对照样本，复现下面的变化；恢复原例会替换当前输入。
02

对照样本

对照样本交换 A 与 B。观察新增与删除的方向、修改前后值如何反转；没有差异时交换仍无差异。

查看对照输入
{
  "ok": true,
  "data": {
    "shipments": [
      {
        "shipmentId": "demo-inserted",
        "description": "新增演示记录",
        "weightGrams": 500,
        "signed": true,
        "state": "in_transit",
        "tracking": {
          "checkpoints": [
            "已揽收",
            "运输中"
          ],
          "carrier": "demo-A"
        }
      },
      {
        "shipmentId": "demo-shipments-1",
        "description": "演示包裹甲",
        "weightGrams": 500,
        "signed": true,
        "state": "in_transit",
        "tracking": {
          "checkpoints": [
            "已揽收",
            "运输中"
          ],
          "carrier": "demo-A"
        }
      },
      {
        "shipmentId": "demo-shipments-2",
        "description": "演示包裹乙",
        "weightGrams": 1200,
        "signed": false,
        "state": "delivered",
        "tracking": {
          "checkpoints": [
            "已签收"
          ],
          "carrier": "demo-B"
        }
      }
    ],
    "summary": {
      "total": 2,
      "note": null
    }
  }
}
{
  "ok": true,
  "data": {
    "shipments": [
      {
        "shipmentId": "demo-shipments-1",
        "description": "演示包裹甲",
        "weightGrams": 500,
        "signed": true,
        "state": "in_transit",
        "tracking": {
          "checkpoints": [
            "已揽收",
            "运输中"
          ],
          "carrier": "demo-A"
        }
      },
      {
        "shipmentId": "demo-shipments-2",
        "description": "演示包裹乙",
        "weightGrams": 1200,
        "signed": false,
        "state": "delivered",
        "tracking": {
          "checkpoints": [
            "已签收"
          ],
          "carrier": "demo-B"
        }
      }
    ],
    "summary": {
      "total": 2,
      "note": null
    }
  }
}

对照样本的实际结果

[
  {
    "op": "replace",
    "path": "/data/shipments/0/shipmentId",
    "oldValue": "demo-inserted",
    "value": "demo-shipments-1"
  },
  {
    "op": "replace",
    "path": "/data/shipments/0/description",
    "oldValue": "新增演示记录",
    "value": "演示包裹甲"
  },
  {
    "op": "replace",
    "path": "/data/shipments/1/shipmentId",
    "oldValue": "demo-shipments-1",
    "value": "demo-shipments-2"
  },
  {
    "op": "replace",
    "path": "/data/shipments/1/description",
    "oldValue": "演示包裹甲",
    "value": "演示包裹乙"
  },
  {
    "op": "replace",
    "path": "/data/shipments/1/weightGrams",
    "oldValue": 500,
    "value": 1200
  },
  {
    "op": "replace",
    "path": "/data/shipments/1/signed",
    "oldValue": true,
    "value": false
  },
  {
    "op": "replace",
    "path": "/data/shipments/1/state",
    "oldValue": "in_transit",
    "value": "delivered"
  },
  {
    "op": "replace",
    "path": "/data/shipments/1/tracking/checkpoints/0",
    "oldValue": "已揽收",
    "value": "已签收"
  },
  {
    "op": "remove",
    "path": "/data/shipments/1/tracking/checkpoints/1",
    "oldValue": "运输中"
  },
  {
    "op": "replace",
    "path": "/data/shipments/1/tracking/carrier",
    "oldValue": "demo-A",
    "value": "demo-B"
  },
  {
    "op": "remove",
    "path": "/data/shipments/2",
    "oldValue": {
      "shipmentId": "demo-shipments-2",
      "description": "演示包裹乙",
      "weightGrams": 1200,
      "signed": false,
      "state": "delivered",
      "tracking": {
        "checkpoints": [
          "已签收"
        ],
        "carrier": "demo-B"
      }
    }
  }
]