Qt C++ FireBase Update Unique Value

OguzhanOzturk

I have a database in FreeBase.

There is a database structure as in the photo .

When I want to make changes in the database, I need to change all the data, but I want to change only one data. The codes I wrote below update all the data.

manager = new QNetworkAccessManager();

request.setUrl(QUrl("https://xxx/Printers/Syra123/3333.json"));
request.setHeader(QNetworkRequest::ContentTypeHeader, QVariant("application/json"));

QVariantMap newPrinter;

newPrinter["AvailableModels"] = value.getAvailableModels();
newPrinter["CurrentBedTemp"] = value.getCurrentBedTemp();
newPrinter["CurrentNozzleTemp"] = value.getCurrentNozzleTemp();
newPrinter["Percentage"] = value.getPercentage();
newPrinter["PrintedTime"] = value.getPrintTime();
newPrinter["PrinterStatus"] = value.getPrinterStatus();
newPrinter["PrintingStatus"] = value.getPrintingStatus();
newPrinter["SelectedBedTemp"] = value.getSelectedBedTemp();
newPrinter["SelectedModel"] = value.getSelectedModel();
newPrinter["SelectedNozzleTemp"] = value.getSelectedNozzleTemp();
newPrinter["SelectedPositionX"] = value.getSelectedNozzleX();
newPrinter["SelectedPositionY"] = value.getSelectedNozzleY();
newPrinter["SelectedPositionZ"] = value.getSelectedNozzleZ();
newPrinter["SelectedPrintSpeed"] = value.getSelectedPrintSpeed();
newPrinter["SelectedPrintingStatus"] = value.getSelectedPrintingStatus();
newPrinter["StartingTime"] = value.getStartingTime();

QJsonDocument jsonDoc = QJsonDocument::fromVariant(newPrinter);

manager->put(request,jsonDoc.toJson());

When I write and send only one data, it destroys all other values in the database and only the data I sent remains. How can I change only the data I want without deleting the data in the DataBase?

SGaist

Hi,

Not knowing the FreeBase API it's hard to answer. Do you have a link of it ?

In any case, the worst case scenario would be to fetch the whole data, change the fields you want and then send again the whole data.