Converting QJsonObject to QVariantMap gives empty map

diredko

Hi All,

I'm trying to read some JSON file and convert it into QVariantMap. For this I use QJsonDocument.
The file is read fine and JSON parsing doesn't give any error but for some reason when I convert this into QVariantMap it is empty.

Please take a look at the code below:

    QString fileNameTemplate("/tmp/%1.json");
    QString fileName = fileNameTemplate.arg("file");

    qDebug() << Q_FUNC_INFO << "Reading from file: " << fileName;

    QFile jsonFile;
    jsonFile.setFileName(fileName);

    if(!jsonFile.open(QIODevice::ReadOnly | QIODevice::Text))
    {
        qWarning() << Q_FUNC_INFO << "Failed to open file";
    }
    else
    {
        QJsonDocument jsonDoc;
        QString jsonText = jsonFile.readAll();
        jsonFile.close();
        qDebug() << Q_FUNC_INFO << "File contents" << jsonText;
        QJsonParseError error;
        jsonDoc.fromJson(jsonText.toLocal8Bit(), &error);

        if(error.error == QJsonParseError::NoError)
        {
             //This QVariant is empty
            QVariant variant = jsonDoc.object().toVariantMap();

            fillInMap(variant.toMap());
        }
        else
        {
            qWarning() << Q_FUNC_INFO << "JSON Parse Error: " << error.errorString();
        }
    }

The output is as follows:

... Reading from file:  "/tmp/file.json"
... File contents "{\n\"variant\":\"variant\"\n}\n"
... fillInMap(const QVariantMap &) QMap()

Does anybody have an idea of what I'm doing wrong here?

diredko

I found the reason for having this issue. I didn't store the result of fromJson function