relationaltablemodel.cpp Example File

relationaltablemodel/relationaltablemodel.cpp
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#include <QtWidgets> #include <QtSql> #include "../connection.h" void initializeModel(QSqlRelationalTableModel *model) { model->setTable("employee"); model->setEditStrategy(QSqlTableModel::OnManualSubmit); model->setRelation(2, QSqlRelation("city", "id", "name")); model->setRelation(3, QSqlRelation("country", "id", "name")); 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")); model->select(); } QTableView *createView(const QString &title, QSqlTableModel *model) { QTableView *view = new QTableView; view->setModel(model); view->setItemDelegate(new QSqlRelationalDelegate(view)); 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); QScopedPointer<QTableView> view(createView(QObject::tr("Relational Table Model"), &model)); view->show(); return app.exec(); }