尝试使用来自现有对象的 jsonata 创建对象

Question

正在尝试使用 jsonata 从现有对象创建对象。当数据和表达式放入 jsonata excerciser 时，会生成正确的结果。但是，当我在 Javascript 程序中运行它时，会生成错误。

以下是javascript代码

const data = {
    "compCode": "0006",
    "compState": "MH",
    "recvDocNo": "0075",
    "buCode": "AC",
    "branchCode": "001",
    "recvLines": [
        {
            "lineNo": 1,
            "itemId": "00002",
            "qtyAccept": 10,
            "unitRate": 100,
            "basicVal": 1000,
            "taxableAmt": 1000,
        }
    ]
};

let expr = {
    "compCode": compCode,
    "buCode": buCode,
    "lineNo": recvLines.lineNo,
    "itemId": recvLines.itemId
};

jsonata(expr).evaluate(data);

我收到错误 - ReferenceError: compCode 未定义

当我将其更改为 data.compCode 和所有其他对象属性时，我收到错误 TypeError: path.charAt is not a function。谁能告诉我如何让它工作。提前致谢

Answer 1

看起来 jsonata() 需要一个字符串表达式作为参数，这在文档中没有明确说明，但显示在 In Nodejs 部分。

const data = {
    "compCode": "0006",
    "compState": "MH",
    "recvDocNo": "0075",
    "buCode": "AC",
    "branchCode": "001",
    "recvLines": [
        {
            "lineNo": 1,
            "itemId": "00002",
            "qtyAccept": 10,
            "unitRate": 100,
            "basicVal": 1000,
            "taxableAmt": 1000,
        },
         {
            "lineNo": 2,
            "itemId": "00006",
            "qtyAccept": 10,
            "unitRate": 100,
            "basicVal": 1000,
            "taxableAmt": 1000,
        }
    ]
};

let expr = `{
  "compCode": compCode, 
  "buCode": buCode, 
  "lineNo": recvLines.lineNo, 
  "itemId": recvLines.itemId
  }`;

console.log(jsonata(expr).evaluate(data));

<script src="https://cdn.jsdelivr.net/npm/jsonata@1.8.5/jsonata.min.js"></script>

尝试使用来自现有对象的 jsonata 创建对象

Trying a create a object using jsonata from existing object

javascript

jsonata