<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE html> <html lang="en"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>relationaltablemodel.cpp Example File | Qt SQL 5.12.6</title> <link rel="stylesheet" type="text/css" href="style/offline-simple.css" /> <script type="text/javascript"> document.getElementsByTagName("link").item(0).setAttribute("href", "style/offline.css"); // loading style sheet breaks anchors that were jumped to before // so force jumping to anchor again setTimeout(function() { var anchor = location.hash; // need to jump to different anchor first (e.g. none) location.hash = "#"; setTimeout(function() { location.hash = anchor; }, 0); }, 0); </script> </head> <body> <div class="header" id="qtdocheader"> <div class="main"> <div class="main-rounded"> <div class="navigationbar"> <table><tr> <td >Qt 5.12</td><td ><a href="qtsql-index.html">Qt SQL</a></td><td ><a href="qtsql-relationaltablemodel-example.html">Relational Table Model Example</a></td><td >relationaltablemodel.cpp Example File</td></tr></table><table class="buildversion"><tr> <td id="buildversion" width="100%" align="right"><a href="qtsql-index.html">Qt 5.12.6 Reference Documentation</a></td> </tr></table> </div> </div> <div class="content"> <div class="line"> <div class="content mainContent"> <div class="sidebar"><div class="sidebar-content" id="sidebar-content"></div></div> <h1 class="title">relationaltablemodel.cpp Example File</h1> <span class="subtitle">relationaltablemodel/relationaltablemodel.cpp</span> <!-- $$$relationaltablemodel/relationaltablemodel.cpp-description --> <div class="descr"> <a name="details"></a> <pre class="cpp"> <span class="comment">/**************************************************************************** ** ** Copyright (C) 2016 The Qt Company Ltd. ** Contact: https://www.qt.io/licensing/ ** ** This file is part of the examples of the Qt Toolkit. ** ** $QT_BEGIN_LICENSE:BSD$ ** Commercial License Usage ** Licensees holding valid commercial Qt licenses may use this file in ** accordance with the commercial license agreement provided with the ** Software or, alternatively, in accordance with the terms contained in ** a written agreement between you and The Qt Company. For licensing terms ** and conditions see https://www.qt.io/terms-conditions. For further ** information use the contact form at https://www.qt.io/contact-us. ** ** BSD License Usage ** Alternatively, 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 The Qt Company Ltd nor the names of its ** contributors may be used to endorse or promote products derived ** from this software without specific prior written permission. ** ** ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE." ** ** $QT_END_LICENSE$ ** ****************************************************************************/</span> <span class="preprocessor">#include <QtWidgets></span> <span class="preprocessor">#include <QtSql></span> <span class="preprocessor">#include "../connection.h"</span> <span class="type">void</span> initializeModel(<span class="type"><a href="qsqlrelationaltablemodel.html">QSqlRelationalTableModel</a></span> <span class="operator">*</span>model) { model<span class="operator">-</span><span class="operator">></span>setTable(<span class="string">"employee"</span>); model<span class="operator">-</span><span class="operator">></span>setEditStrategy(<span class="type"><a href="qsqltablemodel.html">QSqlTableModel</a></span><span class="operator">::</span>OnManualSubmit); model<span class="operator">-</span><span class="operator">></span>setRelation(<span class="number">2</span><span class="operator">,</span> <span class="type"><a href="qsqlrelation.html">QSqlRelation</a></span>(<span class="string">"city"</span><span class="operator">,</span> <span class="string">"id"</span><span class="operator">,</span> <span class="string">"name"</span>)); model<span class="operator">-</span><span class="operator">></span>setRelation(<span class="number">3</span><span class="operator">,</span> <span class="type"><a href="qsqlrelation.html">QSqlRelation</a></span>(<span class="string">"country"</span><span class="operator">,</span> <span class="string">"id"</span><span class="operator">,</span> <span class="string">"name"</span>)); model<span class="operator">-</span><span class="operator">></span>setHeaderData(<span class="number">0</span><span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>Horizontal<span class="operator">,</span> <span class="type"><a href="../qtcore/qobject.html">QObject</a></span><span class="operator">::</span>tr(<span class="string">"ID"</span>)); model<span class="operator">-</span><span class="operator">></span>setHeaderData(<span class="number">1</span><span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>Horizontal<span class="operator">,</span> <span class="type"><a href="../qtcore/qobject.html">QObject</a></span><span class="operator">::</span>tr(<span class="string">"Name"</span>)); model<span class="operator">-</span><span class="operator">></span>setHeaderData(<span class="number">2</span><span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>Horizontal<span class="operator">,</span> <span class="type"><a href="../qtcore/qobject.html">QObject</a></span><span class="operator">::</span>tr(<span class="string">"City"</span>)); model<span class="operator">-</span><span class="operator">></span>setHeaderData(<span class="number">3</span><span class="operator">,</span> <span class="type"><a href="../qtcore/qt.html">Qt</a></span><span class="operator">::</span>Horizontal<span class="operator">,</span> <span class="type"><a href="../qtcore/qobject.html">QObject</a></span><span class="operator">::</span>tr(<span class="string">"Country"</span>)); model<span class="operator">-</span><span class="operator">></span>select(); } <span class="type"><a href="../qtwidgets/qtableview.html">QTableView</a></span> <span class="operator">*</span>createView(<span class="keyword">const</span> <span class="type"><a href="../qtcore/qstring.html">QString</a></span> <span class="operator">&</span>title<span class="operator">,</span> <span class="type"><a href="qsqltablemodel.html">QSqlTableModel</a></span> <span class="operator">*</span>model) { <span class="type"><a href="../qtwidgets/qtableview.html">QTableView</a></span> <span class="operator">*</span>view <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="../qtwidgets/qtableview.html">QTableView</a></span>; view<span class="operator">-</span><span class="operator">></span>setModel(model); view<span class="operator">-</span><span class="operator">></span>setItemDelegate(<span class="keyword">new</span> <span class="type"><a href="qsqlrelationaldelegate.html">QSqlRelationalDelegate</a></span>(view)); view<span class="operator">-</span><span class="operator">></span>setWindowTitle(title); <span class="keyword">return</span> view; } <span class="type">void</span> createRelationalTables() { <span class="type"><a href="qsqlquery.html">QSqlQuery</a></span> query; query<span class="operator">.</span>exec(<span class="string">"create table employee(id int primary key, name varchar(20), city int, country int)"</span>); query<span class="operator">.</span>exec(<span class="string">"insert into employee values(1, 'Espen', 5000, 47)"</span>); query<span class="operator">.</span>exec(<span class="string">"insert into employee values(2, 'Harald', 80000, 49)"</span>); query<span class="operator">.</span>exec(<span class="string">"insert into employee values(3, 'Sam', 100, 1)"</span>); query<span class="operator">.</span>exec(<span class="string">"create table city(id int, name varchar(20))"</span>); query<span class="operator">.</span>exec(<span class="string">"insert into city values(100, 'San Jose')"</span>); query<span class="operator">.</span>exec(<span class="string">"insert into city values(5000, 'Oslo')"</span>); query<span class="operator">.</span>exec(<span class="string">"insert into city values(80000, 'Munich')"</span>); query<span class="operator">.</span>exec(<span class="string">"create table country(id int, name varchar(20))"</span>); query<span class="operator">.</span>exec(<span class="string">"insert into country values(1, 'USA')"</span>); query<span class="operator">.</span>exec(<span class="string">"insert into country values(47, 'Norway')"</span>); query<span class="operator">.</span>exec(<span class="string">"insert into country values(49, 'Germany')"</span>); } <span class="type">int</span> main(<span class="type">int</span> argc<span class="operator">,</span> <span class="type">char</span> <span class="operator">*</span>argv<span class="operator">[</span><span class="operator">]</span>) { <span class="type"><a href="../qtwidgets/qapplication.html">QApplication</a></span> app(argc<span class="operator">,</span> argv); <span class="keyword">if</span> (<span class="operator">!</span>createConnection()) <span class="keyword">return</span> EXIT_FAILURE; createRelationalTables(); <span class="type"><a href="qsqlrelationaltablemodel.html">QSqlRelationalTableModel</a></span> model; initializeModel(<span class="operator">&</span>model); <span class="type"><a href="../qtcore/qscopedpointer.html">QScopedPointer</a></span><span class="operator"><</span><span class="type"><a href="../qtwidgets/qtableview.html">QTableView</a></span><span class="operator">></span> view(createView(<span class="type"><a href="../qtcore/qobject.html">QObject</a></span><span class="operator">::</span>tr(<span class="string">"Relational Table Model"</span>)<span class="operator">,</span> <span class="operator">&</span>model)); view<span class="operator">-</span><span class="operator">></span>show(); <span class="keyword">return</span> app<span class="operator">.</span>exec(); } </pre> </div> <!-- @@@relationaltablemodel/relationaltablemodel.cpp --> </div> </div> </div> </div> </div> <div class="footer"> <p> <acronym title="Copyright">©</acronym> 2019 The Qt Company Ltd. Documentation contributions included herein are the copyrights of their respective owners.<br/> The documentation provided herein is licensed under the terms of the <a href="http://www.gnu.org/licenses/fdl.html">GNU Free Documentation License version 1.3</a> as published by the Free Software Foundation.<br/> Qt and respective logos are trademarks of The Qt Company Ltd. in Finland and/or other countries worldwide. All other trademarks are property of their respective owners. </p> </div> </body> </html>