qt5base-lts/examples/sql/relationaltablemodel/relationaltablemodel.cpp

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/****************************************************************************
**
** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the examples of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:BSD$
** You may use this file under the terms of the BSD license as follows:
**
** "Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions are
** met:
** * Redistributions of source code must retain the above copyright
** notice, this list of conditions and the following disclaimer.
** * Redistributions in binary form must reproduce the above copyright
** notice, this list of conditions and the following disclaimer in
** the documentation and/or other materials provided with the
** distribution.
** * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
** the names of its contributors may be used to endorse or promote
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** permission.
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****************************************************************************/
#include <QtGui>
#include <QtSql>
#include "../connection.h"
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();
}
QTableView *createView(const QString &title, QSqlTableModel *model)
{
//! [4]
QTableView *view = new QTableView;
view->setModel(model);
view->setItemDelegate(new QSqlRelationalDelegate(view));
//! [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 1;
createRelationalTables();
QSqlRelationalTableModel model;
initializeModel(&model);
QTableView *view = createView(QObject::tr("Relational Table Model"), &model);
view->show();
return app.exec();
}