qt 6.5.1 original

examples/sql/relationaltablemodel/CMakeLists.txt

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+# Copyright (C) 2022 The Qt Company Ltd.
+# SPDX-License-Identifier: BSD-3-Clause
+
+cmake_minimum_required(VERSION 3.16)
+project(relationaltablemodel LANGUAGES CXX)
+
+if(NOT DEFINED INSTALL_EXAMPLESDIR)
+    set(INSTALL_EXAMPLESDIR "examples")
+endif()
+
+set(INSTALL_EXAMPLEDIR "${INSTALL_EXAMPLESDIR}/sql/relationaltablemodel")
+
+find_package(Qt6 REQUIRED COMPONENTS Core Gui Sql Widgets)
+
+qt_standard_project_setup()
+
+qt_add_executable(relationaltablemodel
+    ../connection.h
+    relationaltablemodel.cpp
+)
+
+set_target_properties(relationaltablemodel PROPERTIES
+    WIN32_EXECUTABLE TRUE
+    MACOSX_BUNDLE TRUE
+)
+
+target_link_libraries(relationaltablemodel PRIVATE
+    Qt6::Core
+    Qt6::Gui
+    Qt6::Sql
+    Qt6::Widgets
+)
+
+install(TARGETS relationaltablemodel
+    RUNTIME DESTINATION "${INSTALL_EXAMPLEDIR}"
+    BUNDLE DESTINATION "${INSTALL_EXAMPLEDIR}"
+    LIBRARY DESTINATION "${INSTALL_EXAMPLEDIR}"
+)

examples/sql/relationaltablemodel/relationaltablemodel.cpp

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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();
+}

examples/sql/relationaltablemodel/relationaltablemodel.pro

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+HEADERS       = ../connection.h
+SOURCES       = relationaltablemodel.cpp
+QT           += sql widgets
+requires(qtConfig(tableview))
+
+# install
+target.path = $$[QT_INSTALL_EXAMPLES]/sql/relationaltablemodel
+INSTALLS += target
+