Question

Here is my code for my MainWindow:

MainWindow::MainWindow(QWidget *parent)
    : QMainWindow(parent)
{
    QSqlDatabase connection = QSqlDatabase::addDatabase("QMYSQL");
    connection.setHostName("localhost");
    connection.setDatabaseName("dbname");
    connection.setUserName("username");
    connection.setPassword("Temp");



    QTableView *view = new QTableView(this);

    view->setMinimumSize(200, 200);

    QSqlTableModel *model = new QSqlTableModel(this, connection);
    model->setTable("users");
    qDebug()  << model->columnCount() << model->rowCount();
    model->setEditStrategy(QSqlTableModel::OnManualSubmit);
    model->select();
    model->removeColumn(0); // don't show the ID



    view->setModel(model);

    view->show();

    this->setWindowTitle("Showing Things");
}

My main.cpp:

#include "mainwindow.h"

int main(int argc, char *argv[])
{

    QApplication a(argc, argv);
    MainWindow w;
    w.show();

    return a.exec();
}

I know my database contains data, I am basically following the example from the Detailed Explanation here.

This is what I get when I compile and run:

When I expect something like this:

and I do not get it.

What am I doing wrong?

Answer 1

According to the code you posted, you didn’t open the database connection.

QSqlTableModel doesn’t open it for you.