Qt Json only adds 1 new entry eachtime code is called

Kris Revi

    QJsonParseError error;
    QJsonDocument inputJsonDoc = QJsonDocument::fromJson(file.readAll(), &error);
    file.close();

    QJsonObject newDevice;

    newDevice.insert("IPA",      "newdevice");
    newDevice.insert("Icon",     "fa_bolt");
    newDevice.insert("Name",     "New Device");
    newDevice.insert("Status",   "online");
    newDevice.insert("Type",     "Strip");
    newDevice.insert("UVLights", "false");

after this i do

    QJsonArray inputJsonArray = inputJsonDoc.array(); // create JsonArray and store the inputJson as an array
    inputJsonArray.push_back(newDevice);              // then i push_back the newDevice into the array

    QJsonObject newJsonObject;                        // make a new JsonObject
    newJsonObject["Devices"] = inputJsonArray;        // and store the new Json Array inside "Devices" object

    QJsonDocument outputJsonDoc(newJsonObject);       // then put everything back into a JsonDocument

    file.write(outputJsonDoc.toJson());               // and write back to the file

right? :S why is this not working for me?

this is the json file befor adding

{
    "Devices": [
    ]
}

after i add 1 entry

{
    "Devices": [
        {
            "IPA": "newdevice",
            "Icon": "fa_bolt",
            "Name": "New Device",
            "Status": "online",
            "Type": "Strip",
            "UVLights": "false"
        }
    ]
}

after adding 1 more

{
    "Devices": [
        {
            "IPA": "newdevice",
            "Icon": "fa_bolt",
            "Name": "New Device",
            "Status": "online",
            "Type": "Strip",
            "UVLights": "false"
        }
    ]
}

it only adds 1 entry :S it should keep adding a new everytime :S

Christian Ehrlicher

You read a QJsonArray but store a QJsonObject - how is this suppose to work? As we already told you somewhere else you should check the type of your QJsonValue/QJsonDocument via https://doc.qt.io/qt-5/qjsondocument.html#isArray