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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();

}