Create Json using QJsonDocument

4j1th

How can I create a Json like this

{
    "FirstName": "John",
    "LastName": "Doe",
    "Age": 43,
    "Address": {
        "Street": "Downing Street 10",
        "City": "London",
        "Country": "Great Britain"
    },
    "Phone numbers": [
        "+44 1234567",
        "+44 2345678"
    ]
}

I created a sample code but I struck in the middle

QJsonDocument  json;
QJsonArray recordsArray;
QJsonObject  recordObject;

recordObject.insert("FirstName", QJsonValue::fromVariant("John"));
recordObject.insert("LastName", QJsonValue::fromVariant("Doe"));
recordObject.insert("Age", QJsonValue::fromVariant(43));

// ????

recordsArray.push_back(recordObject);
json.setArray(recordsArray);

Paul Colby

One way to create the JSON document you presented:

    QJsonObject recordObject;
    recordObject.insert("FirstName", QJsonValue::fromVariant("John"));
    recordObject.insert("LastName", QJsonValue::fromVariant("Doe"));
    recordObject.insert("Age", QJsonValue::fromVariant(43));

    QJsonObject addressObject;
    addressObject.insert("Street", "Downing Street 10");
    addressObject.insert("City", "London");
    addressObject.insert("Country", "Great Britain");
    recordObject.insert("Address", addressObject);

    QJsonArray phoneNumbersArray;
    phoneNumbersArray.push_back("+44 1234567");
    phoneNumbersArray.push_back("+44 2345678");
    recordObject.insert("Phone Numbers", phoneNumbersArray);

    QJsonDocument doc(recordObject);
    qDebug() << doc.toJson();

Output:

{
    "Address": {
        "City": "London",
        "Country": "Great Britain",
        "Street": "Downing Street 10"
    },
    "Age": 43,
    "FirstName": "John",
    "LastName": "Doe",
    "Phone Numbers": [
        "+44 1234567",
        "+44 2345678"
    ]
}

recordsArray.push_back(recordObject);
json.setArray(recordsArray);

This suggests you might be trying to make the top-level document an array, in which case:

    QJsonObject recordObject;
    recordObject.insert("FirstName", QJsonValue::fromVariant("John"));
    recordObject.insert("LastName", QJsonValue::fromVariant("Doe"));
    recordObject.insert("Age", QJsonValue::fromVariant(43));

    QJsonObject addressObject;
    addressObject.insert("Street", "Downing Street 10");
    addressObject.insert("City", "London");
    addressObject.insert("Country", "Great Britain");
    recordObject.insert("Address", addressObject);

    QJsonArray phoneNumbersArray;
    phoneNumbersArray.push_back("+44 1234567");
    phoneNumbersArray.push_back("+44 2345678");
    recordObject.insert("Phone Numbers", phoneNumbersArray);

    QJsonArray recordsArray;
    recordsArray.push_back(recordObject);
    QJsonDocument doc(recordsArray);
    qDebug() << doc.toJson();

Output:

[
    {
        "Address": {
            "City": "London",
            "Country": "Great Britain",
            "Street": "Downing Street 10"
        },
        "Age": 43,
        "FirstName": "John",
        "LastName": "Doe",
        "Phone Numbers": [
            "+44 1234567",
            "+44 2345678"
        ]
    }
]

I hope that helps :)

4j1th

@Paul-Colby Thank you