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| |
| #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(); |
| } |