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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
#include <QtWidgets>
#include <QtSql>
#include "../connection.h"
#include <memory>
void initializeModel(QSqlRelationalTableModel *model)
{
//! [0]
model->setTable("employee");
//! [0]
model->setEditStrategy(QSqlTableModel::OnManualSubmit);
//! [1]
model->setRelation(2, QSqlRelation("city", "id", "name"));
//! [1] //! [2]
model->setRelation(3, QSqlRelation("country", "id", "name"));
//! [2]
//! [3]
model->setHeaderData(0, Qt::Horizontal, QObject::tr("ID"));
model->setHeaderData(1, Qt::Horizontal, QObject::tr("Name"));
model->setHeaderData(2, Qt::Horizontal, QObject::tr("City"));
model->setHeaderData(3, Qt::Horizontal, QObject::tr("Country"));
//! [3]
model->select();
}
std::unique_ptr<QTableView> createView(const QString &title, QSqlTableModel *model)
{
//! [4]
std::unique_ptr<QTableView> view{new QTableView};
view->setModel(model);
view->setItemDelegate(new QSqlRelationalDelegate(view.get()));
//! [4]
view->setWindowTitle(title);
return view;
}
void createRelationalTables()
{
QSqlQuery query;
query.exec("create table employee(id int primary key, name varchar(20), city int, country int)");
query.exec("insert into employee values(1, 'Espen', 5000, 47)");
query.exec("insert into employee values(2, 'Harald', 80000, 49)");
query.exec("insert into employee values(3, 'Sam', 100, 1)");
query.exec("create table city(id int, name varchar(20))");
query.exec("insert into city values(100, 'San Jose')");
query.exec("insert into city values(5000, 'Oslo')");
query.exec("insert into city values(80000, 'Munich')");
query.exec("create table country(id int, name varchar(20))");
query.exec("insert into country values(1, 'USA')");
query.exec("insert into country values(47, 'Norway')");
query.exec("insert into country values(49, 'Germany')");
}
int main(int argc, char *argv[])
{
QApplication app(argc, argv);
if (!createConnection())
return EXIT_FAILURE;
createRelationalTables();
QSqlRelationalTableModel model;
initializeModel(&model);
std::unique_ptr<QTableView> view = createView(QObject::tr("Relational Table Model"), &model);
view->show();
return app.exec();
}
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