diff options
Diffstat (limited to 'src/sql/doc/snippets/sqldatabase/sqldatabase.cpp')
| -rw-r--r-- | src/sql/doc/snippets/sqldatabase/sqldatabase.cpp | 133 |
1 files changed, 20 insertions, 113 deletions
diff --git a/src/sql/doc/snippets/sqldatabase/sqldatabase.cpp b/src/sql/doc/snippets/sqldatabase/sqldatabase.cpp index bba0487452..5702116365 100644 --- a/src/sql/doc/snippets/sqldatabase/sqldatabase.cpp +++ b/src/sql/doc/snippets/sqldatabase/sqldatabase.cpp @@ -1,65 +1,12 @@ -/**************************************************************************** -** -** Copyright (C) 2016 The Qt Company Ltd. -** Contact: https://www.qt.io/licensing/ -** -** This file is part of the documentation 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." -** -** $QT_END_LICENSE$ -** -****************************************************************************/ - -#include <QtGui> -#include <QtSql> +// Copyright (C) 2016 The Qt Company Ltd. +// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause +#include <QCoreApplication> +#include <QtSql> #include <iostream> using namespace std; -QString tr(const char *text) -{ - return QApplication::translate(text, text); -} - void QSqlDatabase_snippets() { { @@ -86,7 +33,7 @@ void QSqlField_snippets() #if 0 { //! [2] - QSqlField field("age", QVariant::Int); + QSqlField field("age", QMetaType::fromType<int>()); field.setValue(QPixmap()); // WRONG //! [2] } @@ -94,7 +41,7 @@ void QSqlField_snippets() { //! [3] - QSqlField field("age", QVariant::Int); + QSqlField field("age", QMetaType::fromType<int>()); field.setValue(QString("123")); // casts QString to int //! [3] } @@ -207,58 +154,28 @@ void QSqlQuery_snippets() QSqlQuery query; { - // examine with named binding + // examine with named or positional binding //! [14] - QMapIterator<QString, QVariant> i(query.boundValues()); - while (i.hasNext()) { - i.next(); - cout << i.key().toUtf8().data() << ": " - << i.value().toString().toUtf8().data() << Qt::endl; - } + const QVariantList list = query.boundValues(); + for (qsizetype i = 0; i < list.size(); ++i) + qDebug() << i << ":" << list.at(i).toString(); //! [14] } - - { - // examine with positional binding -//! [15] - QList<QVariant> list = query.boundValues().values(); - for (int i = 0; i < list.size(); ++i) - cout << i << ": " << list.at(i).toString().toUtf8().data() << Qt::endl; -//! [15] - } } void QSqlQueryModel_snippets() { - { -//! [16] - QSqlQueryModel *model = new QSqlQueryModel; - model->setQuery("SELECT name, salary FROM employee"); - model->setHeaderData(0, Qt::Horizontal, tr("Name")); - model->setHeaderData(1, Qt::Horizontal, tr("Salary")); - -//! [17] - QTableView *view = new QTableView; -//! [17] //! [18] - view->setModel(model); -//! [18] //! [19] - view->show(); -//! [16] //! [19] //! [20] - view->setEditTriggers(QAbstractItemView::NoEditTriggers); -//! [20] - } //! [21] - QSqlTableModel model; - model.setTable("employee"); - model.select(); + QSqlQueryModel model; + model.setQuery("SELECT name, salary FROM employee"); int salary = model.record(4).value("salary").toInt(); //! [21] Q_UNUSED(salary); { //! [22] - int salary = model.data(model.index(4, 2)).toInt(); + int salary = model.data(model.index(4, 1)).toInt(); //! [22] Q_UNUSED(salary); } @@ -274,6 +191,7 @@ class MyModel : public QSqlQueryModel { public: QVariant data(const QModelIndex &item, int role) const override; + void fetchModel(); int m_specialColumnNo; }; @@ -290,26 +208,14 @@ QVariant MyModel::data(const QModelIndex &item, int role) const void QSqlTableModel_snippets() { -//! [24] - QSqlTableModel *model = new QSqlTableModel(parentObject, database); - model->setTable("employee"); - model->setEditStrategy(QSqlTableModel::OnManualSubmit); - model->select(); - model->setHeaderData(0, Qt::Horizontal, tr("Name")); - model->setHeaderData(1, Qt::Horizontal, tr("Salary")); - - QTableView *view = new QTableView; - view->setModel(model); - view->hideColumn(0); // don't show the ID - view->show(); -//! [24] - { //! [25] QSqlTableModel model; model.setTable("employee"); - QString name = model.record(4).value("name").toString(); + model.select(); + int salary = model.record(4).value("salary").toInt(); //! [25] + Q_UNUSED(salary); } } @@ -376,6 +282,7 @@ void sql_intro_snippets() numRows = query.at() + 1; } //! [33] + Q_UNUSED(numRows); } { @@ -550,14 +457,14 @@ public: const QString & /* password */, const QString & /* host */, int /* port */, const QString & /* options */) override { return false; } - void close() {} + void close() override {} QSqlResult *createResult() const override { return new XyzResult(this); } }; //! [48] int main(int argc, char **argv) { - QApplication app(argc, argv); + QCoreApplication app(argc, argv); QSqlDatabase_snippets(); QSqlField_snippets(); |