QJsonObject not working right? cannot debug?

[Gibbz]

I'm trying to load a json file, and apply the data to my QJsonArray. But I first need to use a QJsonObject and use that to get my array. I'm not having much luck debugging the QJsonObject always shows it has 6 items that are inaccessible, but log to console fine... But then don't output into the array...
Any ideas why this is not working?
My code bellow:

    QFile file(":/stations.json");
    file.open(QIODevice::ReadOnly | QIODevice::Text);
    QByteArray file_data = file.readAll();
    file.close();

    QJsonParseError JsonParseError;
    QJsonDocument doc = QJsonDocument::fromJson(file_data, &JsonParseError);
    QJsonObject obj = doc.object();
    QJsonArray stations = obj["stations"].toArray();

    // debug
    QString jsonString = doc.toJson(QJsonDocument::Indented);
    QString strFromObj = QJsonDocument(obj).toJson(QJsonDocument::Compact).toStdString().c_str();
    qDebug() << strFromObj;

And a sample json:

{
    "stations" : [
        ["94648", "IDS60801", "SA", "Adelaide (West Terrace /  ngayirdapira)", "-34.9", "138.6"],
        ["94675", "IDS60801", "SA", "Adelaide (Kent Town)", "-34.9", "138.6"]
    ]
}

[Gibbz]

looks like it is actually working! It just not possible to debug this except through qDebug messages.

[JKSH]

Your code doesn't do anything with JsonParseError or stations. Your debug code doesn't do anything with jsonString.

What do you get when you call this?:

qDebug() << JsonParseError.errorString();
qDebug() << stations;

[Gibbz]

looks like it is actually working! It just not possible to debug this except through qDebug messages.

[JKSH]

@Gibbz said in QJsonObject not working right? cannot debug?:

It just not possible to debug this except through qDebug messages.

You can debug it however you want. I prefer qDebug() because its interface is a lot nicer; you can pass a QJsonDocument or QJsonObject or QJsonArray straight in:

QJsonDocument doc = QJsonDocument::fromJson(file_data, &JsonParseError);
QJsonObject obj = doc.object();
QJsonArray stations = obj["stations"].toArray();

qDebug() << doc;
qDebug() << obj;
qDebug() << stations;

QString strFromObj = QJsonDocument(obj).toJson(QJsonDocument::Compact).toStdString().c_str();
qDebug() << strFromObj;

It doesn't make sense to convert everything to a C String and then back to a QString.

You can implicitly convert a QByteArray directly to a QString...

QString strFromObj = QJsonDocument(obj).toJson(QJsonDocument::Compact);

...or you can debug using std::string and std::cout:
``
std::cout << QJsonDocument(obj).toJson(QJsonDocument::Compact).toStdString();