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changing contract class

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Hi,

I have a custom service that accepts this contract class as an input

{
    "_input": 
    {
        "header": 
        {
            "dataArea": "A1",
            "mainId": "1",
            "line": 
            [
                {
                   
                    "fieldA": 1,
                    "id": "Id1"
                },
		{
                   
                    "fieldA": 2,
                    "id": "Id2"
                },
                {
                   
                    "fieldA": 3,
                    "id": "Id1"
                }
            ] 
        }
    }
}

After accepting this contract as an input to the custom service, how can i add x++ code to convert it to the format below? ( i want to group the ids in lines)

{
    "_input": 
    {
        "header": 
        {
            "dataArea": "A1",
            "mainId": "1",
            "ids": 
            [
                {
                    "id": "id1",
                    "Line":
                    [
                        {
                            "fieldA": 1
                        },
                        {
                            "fieldA": 3
                        }
                    ]
                },
                {
                    "id": "id2",
                    "line":
                    [
                        {
                            "fieldA": 2
                        }
                    ]
                }
            ]
        }
    }
}

All responses (3)

Answers (0)

Martin Dráb 230,503 Most Valuable Professional on at

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changing contract class

My point is that the code you showed is irrelevant to your question. Forget JSON and focus on objects in X++. Please show us your contract classes instead and explain where you got stuck when trying to write your X++.

The first thing you'll need is iterating line contract objects. Do you know how to iterate elements of a list or do you need our help with that too?
.. 1,167 on at

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changing contract class

Hi Martin,

Yes I mean the contract class i have represents this Json.

However, i want to re-arrange the received contract to the 2nd format. How can i do that? How can i group the first contract by Ids to achieve the 2nd format? Do i need to use maps for example an what to do exactly?
Suggested answer

Martin Dráb 230,503 Most Valuable Professional on at

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changing contract class

These are JSON strings, not contract classes. You'll define a contract class for the input JSON, use it as a parameter of your custom service and what you'll receive is an instance of your contract class populated with the data from the JSON string. You'll not receive the JSON string and therefore you don't need to worry at all about how to parse it or convert it in X++. If you want take data from your contract object and put it to another object, it's just normal object-oriented programming.