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问卷题目：解释 questions 首部插入导致的多处差异

数组按下标逐项比较。在 questions 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/questions/0/questionId",
    "oldValue": "demo-surveys-1",
    "value": "demo-inserted"
  },
  {
    "op": "replace",
    "path": "/data/questions/0/title",
    "oldValue": "演示偏好选择",
    "value": "新增演示记录"
  },
  {
    "op": "replace",
    "path": "/data/questions/1/questionId",
    "oldValue": "demo-surveys-2",
    "value": "demo-surveys-1"
  },
  {
    "op": "replace",
    "path": "/data/questions/1/title",
    "oldValue": "演示功能选择",
    "value": "演示偏好选择"
  },
  {
    "op": "replace",
    "path": "/data/questions/1/sortOrder",
    "oldValue": 2,
    "value": 1
  },
  {
    "op": "replace",
    "path": "/data/questions/1/required",
    "oldValue": false,
    "value": true
  },
  {
    "op": "replace",
    "path": "/data/questions/1/type",
    "oldValue": "multiple",
    "value": "single"
  },
  {
    "op": "replace",
    "path": "/data/questions/1/choices/options/0",
    "oldValue": "功能甲",
    "value": "选项甲"
  },
  {
    "op": "replace",
    "path": "/data/questions/1/choices/options/1",
    "oldValue": "功能乙",
    "value": "选项乙"
  },
  {
    "op": "remove",
    "path": "/data/questions/1/choices/options/2",
    "oldValue": "功能丙"
  },
  {
    "op": "replace",
    "path": "/data/questions/1/choices/randomize",
    "oldValue": true,
    "value": false
  },
  {
    "op": "add",
    "path": "/data/questions/2",
    "value": {
      "questionId": "demo-surveys-2",
      "title": "演示功能选择",
      "sortOrder": 2,
      "required": false,
      "type": "multiple",
      "choices": {
        "options": [
          "功能甲",
          "功能乙",
          "功能丙"
        ],
        "randomize": true
      }
    }
  }
]

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

题目 required 是业务问卷字段，和 JSON Schema 的 required 关键字不是同一层规则。此处只处理题目配置。

sortOrder 为示例题序；随机显示逻辑由问卷产品实现。

  1. 核对 问卷题目 的字段层级，保留 questionId 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": {
    "questions": [
      {
        "questionId": "demo-inserted",
        "title": "新增演示记录",
        "sortOrder": 1,
        "required": true,
        "type": "single",
        "choices": {
          "options": [
            "选项甲",
            "选项乙"
          ],
          "randomize": false
        }
      },
      {
        "questionId": "demo-surveys-1",
        "title": "演示偏好选择",
        "sortOrder": 1,
        "required": true,
        "type": "single",
        "choices": {
          "options": [
            "选项甲",
            "选项乙"
          ],
          "randomize": false
        }
      },
      {
        "questionId": "demo-surveys-2",
        "title": "演示功能选择",
        "sortOrder": 2,
        "required": false,
        "type": "multiple",
        "choices": {
          "options": [
            "功能甲",
            "功能乙",
            "功能丙"
          ],
          "randomize": true
        }
      }
    ],
    "summary": {
      "total": 2,
      "note": null
    }
  }
}
{
  "ok": true,
  "data": {
    "questions": [
      {
        "questionId": "demo-surveys-1",
        "title": "演示偏好选择",
        "sortOrder": 1,
        "required": true,
        "type": "single",
        "choices": {
          "options": [
            "选项甲",
            "选项乙"
          ],
          "randomize": false
        }
      },
      {
        "questionId": "demo-surveys-2",
        "title": "演示功能选择",
        "sortOrder": 2,
        "required": false,
        "type": "multiple",
        "choices": {
          "options": [
            "功能甲",
            "功能乙",
            "功能丙"
          ],
          "randomize": true
        }
      }
    ],
    "summary": {
      "total": 2,
      "note": null
    }
  }
}

对照样本的实际结果

[
  {
    "op": "replace",
    "path": "/data/questions/0/questionId",
    "oldValue": "demo-inserted",
    "value": "demo-surveys-1"
  },
  {
    "op": "replace",
    "path": "/data/questions/0/title",
    "oldValue": "新增演示记录",
    "value": "演示偏好选择"
  },
  {
    "op": "replace",
    "path": "/data/questions/1/questionId",
    "oldValue": "demo-surveys-1",
    "value": "demo-surveys-2"
  },
  {
    "op": "replace",
    "path": "/data/questions/1/title",
    "oldValue": "演示偏好选择",
    "value": "演示功能选择"
  },
  {
    "op": "replace",
    "path": "/data/questions/1/sortOrder",
    "oldValue": 1,
    "value": 2
  },
  {
    "op": "replace",
    "path": "/data/questions/1/required",
    "oldValue": true,
    "value": false
  },
  {
    "op": "replace",
    "path": "/data/questions/1/type",
    "oldValue": "single",
    "value": "multiple"
  },
  {
    "op": "replace",
    "path": "/data/questions/1/choices/options/0",
    "oldValue": "选项甲",
    "value": "功能甲"
  },
  {
    "op": "replace",
    "path": "/data/questions/1/choices/options/1",
    "oldValue": "选项乙",
    "value": "功能乙"
  },
  {
    "op": "add",
    "path": "/data/questions/1/choices/options/2",
    "value": "功能丙"
  },
  {
    "op": "replace",
    "path": "/data/questions/1/choices/randomize",
    "oldValue": false,
    "value": true
  },
  {
    "op": "remove",
    "path": "/data/questions/2",
    "oldValue": {
      "questionId": "demo-surveys-2",
      "title": "演示功能选择",
      "sortOrder": 2,
      "required": false,
      "type": "multiple",
      "choices": {
        "options": [
          "功能甲",
          "功能乙",
          "功能丙"
        ],
        "randomize": true
      }
    }
  }
]