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优惠配置：解释 discounts 首部插入导致的多处差异

数组按下标逐项比较。在 discounts 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/discounts/0/couponCode",
    "oldValue": "demo-discounts-1",
    "value": "demo-inserted"
  },
  {
    "op": "replace",
    "path": "/data/discounts/0/label",
    "oldValue": "演示立减规则",
    "value": "新增演示记录"
  },
  {
    "op": "replace",
    "path": "/data/discounts/1/couponCode",
    "oldValue": "demo-discounts-2",
    "value": "demo-discounts-1"
  },
  {
    "op": "replace",
    "path": "/data/discounts/1/label",
    "oldValue": "演示折扣规则",
    "value": "演示立减规则"
  },
  {
    "op": "replace",
    "path": "/data/discounts/1/minimumCents",
    "oldValue": 20000,
    "value": 10000
  },
  {
    "op": "replace",
    "path": "/data/discounts/1/enabled",
    "oldValue": false,
    "value": true
  },
  {
    "op": "replace",
    "path": "/data/discounts/1/kind",
    "oldValue": "percentage",
    "value": "fixed"
  },
  {
    "op": "replace",
    "path": "/data/discounts/1/eligibility/products/0",
    "oldValue": "demo-P02",
    "value": "demo-P01"
  },
  {
    "op": "remove",
    "path": "/data/discounts/1/eligibility/products/1",
    "oldValue": "demo-P03"
  },
  {
    "op": "replace",
    "path": "/data/discounts/1/eligibility/newCustomer",
    "oldValue": false,
    "value": true
  },
  {
    "op": "add",
    "path": "/data/discounts/2",
    "value": {
      "couponCode": "demo-discounts-2",
      "label": "演示折扣规则",
      "minimumCents": 20000,
      "enabled": false,
      "kind": "percentage",
      "eligibility": {
        "products": [
          "demo-P02",
          "demo-P03"
        ],
        "newCustomer": false
      }
    }
  }
]

原例已核验，可修改输入后重新运行。

⌘ / Ctrl + Enter 运行
01

场景与操作说明

优惠配置是否可叠加、门槛如何计算都需要业务合同。本例只校验合成字段，不生成或发放真实优惠券。

minimumCents 为演示门槛金额，以分计；不代表实际优惠力度。

  1. 核对 优惠配置 的字段层级，保留 couponCode 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": {
    "discounts": [
      {
        "couponCode": "demo-inserted",
        "label": "新增演示记录",
        "minimumCents": 10000,
        "enabled": true,
        "kind": "fixed",
        "eligibility": {
          "products": [
            "demo-P01"
          ],
          "newCustomer": true
        }
      },
      {
        "couponCode": "demo-discounts-1",
        "label": "演示立减规则",
        "minimumCents": 10000,
        "enabled": true,
        "kind": "fixed",
        "eligibility": {
          "products": [
            "demo-P01"
          ],
          "newCustomer": true
        }
      },
      {
        "couponCode": "demo-discounts-2",
        "label": "演示折扣规则",
        "minimumCents": 20000,
        "enabled": false,
        "kind": "percentage",
        "eligibility": {
          "products": [
            "demo-P02",
            "demo-P03"
          ],
          "newCustomer": false
        }
      }
    ],
    "summary": {
      "total": 2,
      "note": null
    }
  }
}
{
  "ok": true,
  "data": {
    "discounts": [
      {
        "couponCode": "demo-discounts-1",
        "label": "演示立减规则",
        "minimumCents": 10000,
        "enabled": true,
        "kind": "fixed",
        "eligibility": {
          "products": [
            "demo-P01"
          ],
          "newCustomer": true
        }
      },
      {
        "couponCode": "demo-discounts-2",
        "label": "演示折扣规则",
        "minimumCents": 20000,
        "enabled": false,
        "kind": "percentage",
        "eligibility": {
          "products": [
            "demo-P02",
            "demo-P03"
          ],
          "newCustomer": false
        }
      }
    ],
    "summary": {
      "total": 2,
      "note": null
    }
  }
}

对照样本的实际结果

[
  {
    "op": "replace",
    "path": "/data/discounts/0/couponCode",
    "oldValue": "demo-inserted",
    "value": "demo-discounts-1"
  },
  {
    "op": "replace",
    "path": "/data/discounts/0/label",
    "oldValue": "新增演示记录",
    "value": "演示立减规则"
  },
  {
    "op": "replace",
    "path": "/data/discounts/1/couponCode",
    "oldValue": "demo-discounts-1",
    "value": "demo-discounts-2"
  },
  {
    "op": "replace",
    "path": "/data/discounts/1/label",
    "oldValue": "演示立减规则",
    "value": "演示折扣规则"
  },
  {
    "op": "replace",
    "path": "/data/discounts/1/minimumCents",
    "oldValue": 10000,
    "value": 20000
  },
  {
    "op": "replace",
    "path": "/data/discounts/1/enabled",
    "oldValue": true,
    "value": false
  },
  {
    "op": "replace",
    "path": "/data/discounts/1/kind",
    "oldValue": "fixed",
    "value": "percentage"
  },
  {
    "op": "replace",
    "path": "/data/discounts/1/eligibility/products/0",
    "oldValue": "demo-P01",
    "value": "demo-P02"
  },
  {
    "op": "add",
    "path": "/data/discounts/1/eligibility/products/1",
    "value": "demo-P03"
  },
  {
    "op": "replace",
    "path": "/data/discounts/1/eligibility/newCustomer",
    "oldValue": true,
    "value": false
  },
  {
    "op": "remove",
    "path": "/data/discounts/2",
    "oldValue": {
      "couponCode": "demo-discounts-2",
      "label": "演示折扣规则",
      "minimumCents": 20000,
      "enabled": false,
      "kind": "percentage",
      "eligibility": {
        "products": [
          "demo-P02",
          "demo-P03"
        ],
        "newCustomer": false
      }
    }
  }
]