qmlRegisterType not working, cannot import C++ Object

[Julia Johnson]

I am getting this error when running the following code:

qrc:/Masterpatientframeii.qml:45 Expected type name

Here is the QML file importing the C++ object (hopefully)...

import QtQuick 2.7
import QtQuick.Controls 2.0
import QtQuick.Layouts 1.3

import io.qt.projects.mockup1 1.0

Frame {
    id: masterpatientframe


    property var patientdata

    Frame {
        id: patientinfo
        x: -24
        y: -12
        width: 300
        height: 350
        anchors.left: parent.left
        anchors.leftMargin: -12
        anchors.bottom: parent.bottom
        anchors.bottomMargin: -32
        
        Frame {
            id: patientselectionframe
            x: 277
            y: -24
            width: 259
            anchors.bottom: parent.bottom
            anchors.bottomMargin: 12
            anchors.topMargin: -12
            anchors.top: parent.top
            anchors.left: parent.left
            anchors.leftMargin: 289
            

            ListView {
                id: patientlistview
                anchors.fill:parent
                topMargin: 5
                leftMargin: 5
                bottomMargin: 5
                rightMargin: 5
                spacing: 15
                model: sqlpatientdata{} //This is what Qt 5.7 refuses to load

                delegate: ItemDelegate {
                    width: patientlistview.width - patientlistview.leftMargin - patientlistview.rightMargin
                    height: 40

                    Row {
                        id: row1

                        Rectangle {
                            id: rectangle1
                            width: 40
                            height: 40
                            color: "steelblue"
                            Label{
                                font.pixelSize: 10

                                text:name
                                font.bold: true
                            }
                        }

                        Rectangle {
                            id: rectangle2
                            width: 50
                            height: 40
                            color: "lightgray"
                        } // ETC... more rectangles
                         }//end row
                    }//end itemdelegate
                }//endlistView
}//endframe

I am pretty sure I used qmlRegisterType correctly to connect my C++ object to this QML. Here is main.cpp

#include <QGuiApplication>
#include <QQmlApplicationEngine>

#include <QStandardPaths>
#include <QSqlDatabase>
#include <QSqlError>

#include <QtSql>

#include "sqlpatientdata.h"

static void connectToDatabase()
{
    QSqlDatabase database = QSqlDatabase::database();
    if (!database.isValid()) {
        database = QSqlDatabase::addDatabase("QSQLITE");
        if (!database.isValid())
            qFatal("Cannot add database: %s", qPrintable(database.lastError().text()));
    }

    const QDir writeDir = QStandardPaths::writableLocation(QStandardPaths::AppDataLocation);
    if (!writeDir.mkpath("."))
        qFatal("Failed to create writable directory at %s", qPrintable(writeDir.absolutePath()));

    // Ensure that we have a writable location on all devices.
    const QString fileName = writeDir.absolutePath() + "/chat-database.sqlite3";
    // When using the SQLite driver, open() will create the SQLite database if it doesn't exist.
    database.setDatabaseName(fileName);
    if (!database.open()) {
        qFatal("Cannot open database: %s", qPrintable(database.lastError().text()));
        QFile::remove(fileName);
    }
}


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

    qmlRegisterType<sqlpatientdata>("io.qt.projects.mockup1", 1,0, "sqlpatientdata");

    connectToDatabase();

    QQmlApplicationEngine engine;
    engine.load(QUrl(QLatin1String("qrc:/main.qml")));

    return app.exec();
}

Any explanation of this error would be great. When I comment out model: sqlpatientdata the error goes away. Qt is struggling to import the C++ object over to QML :(

[A Former User]

Hi!

@Julia-Johnson said:
I am pretty sure I used qmlRegisterType correctly

Well, almost. But for the QML magic to work all your QML type names have to start with an uppercase character. So the following should work:

qmlRegisterType<sqlpatientdata>("io.qt.projects.mockup1", 1,0, "Sqlpatientdata");

You can now use the type in your QML files (Sqlpatientdata{}).

[Julia Johnson]

Thank-you so much! That fixed the issue! I can now visualize data from my QSqlTableModel and implement Q_INVOKABLE functions. Thanks!