Trying a create a object using jsonata from existing object

Question

Trying to create object out of existing object using jsonata. When the data and expression is put in jsonata excerciser, correct result is generated. However when I run it in Javascript program, errors are generated.

following is javascript code

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);

I get error - ReferenceError: compCode is not defined

when I change it to data.compCode and all other object properties similarly, I get an error TypeError: path.charAt is not a function. Could someone tell me how to get it working. Thanks in advance

Answer 1

It looks like jsonata() expects a string expression as a parameter, which isn't explicitly stated in the docs, but is shown in the In Nodejs section.

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>