[Qml/c++] ReferenceError: code is not defined

Nio74

Good moorning it give me a error in the row 16: ReferenceError: code is not defined

this is my Riparazioni.qml
import QtQuick 2.10
import QtQuick.Controls 2.3
import io.qt.Backend 1.0

Item
{
id: element

Backend {
    id: backend

    onSendCode: {
        
        console.log( "This is code---> " + code); // errrrrrrrrrorrrrrrrr
    }

}


Row {
    id: row1
    height: 50
    anchors.right: parent.right
    anchors.rightMargin: 5
    anchors.left: parent.left
    anchors.leftMargin: 5
    anchors.top: parent.top
    anchors.topMargin: 3

    Rectangle {
        id: rectangle_Search
        height: 44
        color: "#0e99b2"
        anchors.top: parent.verticalCenter
        anchors.topMargin: -25
        anchors.left: parent.left

        anchors.right: parent.right


        Text {
            id:lbl_SearchCode
            color: "#0a0808"
            text: qsTr("Codice")
            anchors.verticalCenter: parent.verticalCenter
            anchors.left: parent.left
            anchors.leftMargin: 4
            font.pixelSize: 12
        }

        CustomTextEdit {
            id: c_Txt_codice
            y: 0
            width: 50
            height: 20
            anchors.verticalCenter: parent.verticalCenter
            anchors.bottom: parent
            anchors.bottomMargin: 0
            anchors.left: lbl_SearchCode.right
            anchors.leftMargin: 20

        }

        CustomButton {
            id: btnSearchKey
            x: 583
            y: 3
            text: "S"
            anchors.verticalCenter: parent.verticalCenter
            anchors.right: parent.right
            anchors.rightMargin: 5
            anchors.top: parent.verticalCenter
            anchors.topMargin: -22
            color: enabled ? this.down ? "#78C37F" : "#87DB8D" : "gray"
            onClicked: {
                // backend.connectClicked()
                backend.connectClicked()
                backend.sendClicked(c_Txt_codice.text)
            }
        }

    }
}
Row {
    id: row2
    height: 200
    anchors.right: parent.right
    anchors.rightMargin: 3
    anchors.left: parent.left
    anchors.leftMargin: 3
    anchors.top: row1.bottom
    anchors.topMargin: 2

    Rectangle{
        id: rectangle_Articolo
        color: "#0e99b2"
        anchors.fill: parent



        Label{
            id: lbl_NBusta
            color: "#ebedef"
            text: "N°Busta"
            anchors.left: parent.left
            anchors.leftMargin: 5
            anchors.top: parent.top
            anchors.topMargin: 10
        }

        CustomTextEdit {
            id: txtCodice
            width: 40
            height: 18
            anchors.top: parent.top
            anchors.topMargin: 10
            anchors.left: lbl_NBusta.right
            anchors.leftMargin: 10
        }

    }

}

}
this is my main.cpp


int main(int argc, char *argv[])
{
    QCoreApplication::setAttribute(Qt::AA_EnableHighDpiScaling);

    QGuiApplication app(argc, argv);

    //Pass my c++ to Qml

    //qmlRegisterType<ClientServices>("io.qt.Clienteservices", 1, 0, "Clientservices");


    qmlRegisterType<Backend>("io.qt.Backend", 1, 0, "Backend");
//    Backend backend;

//    QQmlContext *context = engine.rootContext();
//    context->setContextProperty("backend",&backend);
    QQmlApplicationEngine engine;
    engine.load(QUrl(QStringLiteral("qrc:/main.qml")));


    if (engine.rootObjects().isEmpty())
        return -1;

    return app.exec();
}

this is the Signal with send at Riparazioni.qml and I have do the debug it has data:

dheerendra

Show where you declared the signals and it's argument ?