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导航菜单：解释 menus 首部插入导致的多处差异

数组按下标逐项比较。在 menus 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。

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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/menus/0/menuId",
    "oldValue": "demo-menus-1",
    "value": "demo-inserted"
  },
  {
    "op": "replace",
    "path": "/data/menus/0/label",
    "oldValue": "演示工作台",
    "value": "新增演示记录"
  },
  {
    "op": "replace",
    "path": "/data/menus/1/menuId",
    "oldValue": "demo-menus-2",
    "value": "demo-menus-1"
  },
  {
    "op": "replace",
    "path": "/data/menus/1/label",
    "oldValue": "演示帮助中心",
    "value": "演示工作台"
  },
  {
    "op": "replace",
    "path": "/data/menus/1/sortOrder",
    "oldValue": 20,
    "value": 10
  },
  {
    "op": "replace",
    "path": "/data/menus/1/visible",
    "oldValue": false,
    "value": true
  },
  {
    "op": "replace",
    "path": "/data/menus/1/placement",
    "oldValue": "header",
    "value": "sidebar"
  },
  {
    "op": "replace",
    "path": "/data/menus/1/navigation/path",
    "oldValue": "/demo/help",
    "value": "/demo/workbench"
  },
  {
    "op": "replace",
    "path": "/data/menus/1/navigation/children/0",
    "oldValue": "faq",
    "value": "overview"
  },
  {
    "op": "add",
    "path": "/data/menus/1/navigation/children/1",
    "value": "history"
  },
  {
    "op": "add",
    "path": "/data/menus/2",
    "value": {
      "menuId": "demo-menus-2",
      "label": "演示帮助中心",
      "sortOrder": 20,
      "visible": false,
      "placement": "header",
      "navigation": {
        "path": "/demo/help",
        "children": [
          "faq"
        ]
      }
    }
  }
]

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

菜单标题、排序和链接需要分别核对。数组顺序可能用于展示，而实际权限不能只靠 visible 字段控制。

sortOrder 是本例排序权重；同权重时的顺序需由实际产品另行约定。

  1. 核对 导航菜单 的字段层级，保留 menuId 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": {
    "menus": [
      {
        "menuId": "demo-inserted",
        "label": "新增演示记录",
        "sortOrder": 10,
        "visible": true,
        "placement": "sidebar",
        "navigation": {
          "path": "/demo/workbench",
          "children": [
            "overview",
            "history"
          ]
        }
      },
      {
        "menuId": "demo-menus-1",
        "label": "演示工作台",
        "sortOrder": 10,
        "visible": true,
        "placement": "sidebar",
        "navigation": {
          "path": "/demo/workbench",
          "children": [
            "overview",
            "history"
          ]
        }
      },
      {
        "menuId": "demo-menus-2",
        "label": "演示帮助中心",
        "sortOrder": 20,
        "visible": false,
        "placement": "header",
        "navigation": {
          "path": "/demo/help",
          "children": [
            "faq"
          ]
        }
      }
    ],
    "summary": {
      "total": 2,
      "note": null
    }
  }
}
{
  "ok": true,
  "data": {
    "menus": [
      {
        "menuId": "demo-menus-1",
        "label": "演示工作台",
        "sortOrder": 10,
        "visible": true,
        "placement": "sidebar",
        "navigation": {
          "path": "/demo/workbench",
          "children": [
            "overview",
            "history"
          ]
        }
      },
      {
        "menuId": "demo-menus-2",
        "label": "演示帮助中心",
        "sortOrder": 20,
        "visible": false,
        "placement": "header",
        "navigation": {
          "path": "/demo/help",
          "children": [
            "faq"
          ]
        }
      }
    ],
    "summary": {
      "total": 2,
      "note": null
    }
  }
}

对照样本的实际结果

[
  {
    "op": "replace",
    "path": "/data/menus/0/menuId",
    "oldValue": "demo-inserted",
    "value": "demo-menus-1"
  },
  {
    "op": "replace",
    "path": "/data/menus/0/label",
    "oldValue": "新增演示记录",
    "value": "演示工作台"
  },
  {
    "op": "replace",
    "path": "/data/menus/1/menuId",
    "oldValue": "demo-menus-1",
    "value": "demo-menus-2"
  },
  {
    "op": "replace",
    "path": "/data/menus/1/label",
    "oldValue": "演示工作台",
    "value": "演示帮助中心"
  },
  {
    "op": "replace",
    "path": "/data/menus/1/sortOrder",
    "oldValue": 10,
    "value": 20
  },
  {
    "op": "replace",
    "path": "/data/menus/1/visible",
    "oldValue": true,
    "value": false
  },
  {
    "op": "replace",
    "path": "/data/menus/1/placement",
    "oldValue": "sidebar",
    "value": "header"
  },
  {
    "op": "replace",
    "path": "/data/menus/1/navigation/path",
    "oldValue": "/demo/workbench",
    "value": "/demo/help"
  },
  {
    "op": "replace",
    "path": "/data/menus/1/navigation/children/0",
    "oldValue": "overview",
    "value": "faq"
  },
  {
    "op": "remove",
    "path": "/data/menus/1/navigation/children/1",
    "oldValue": "history"
  },
  {
    "op": "remove",
    "path": "/data/menus/2",
    "oldValue": {
      "menuId": "demo-menus-2",
      "label": "演示帮助中心",
      "sortOrder": 20,
      "visible": false,
      "placement": "header",
      "navigation": {
        "path": "/demo/help",
        "children": [
          "faq"
        ]
      }
    }
  }
]