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| |
| #ifndef CONNECTION_H |
| #define CONNECTION_H |
| |
| #include <QMessageBox> |
| #include <QSqlDatabase> |
| #include <QSqlError> |
| #include <QSqlQuery> |
| |
| /* |
| This file defines a helper function to open a connection to an |
| in-memory SQLITE database and to create a test table. |
| |
| If you want to use another database, simply modify the code |
| below. All the examples in this directory use this function to |
| connect to a database. |
| */ |
| //! [0] |
| static bool createConnection() |
| { |
| QSqlDatabase db = QSqlDatabase::addDatabase("QSQLITE"); |
| db.setDatabaseName(":memory:"); |
| if (!db.open()) { |
| QMessageBox::critical(nullptr, QObject::tr("Cannot open database"), |
| QObject::tr("Unable to establish a database connection.\n" |
| "This example needs SQLite support. Please read " |
| "the Qt SQL driver documentation for information how " |
| "to build it.\n\n" |
| "Click Cancel to exit."), QMessageBox::Cancel); |
| return false; |
| } |
| |
| QSqlQuery query; |
| query.exec("create table person (id int primary key, " |
| "firstname varchar(20), lastname varchar(20))"); |
| query.exec("insert into person values(101, 'Danny', 'Young')"); |
| query.exec("insert into person values(102, 'Christine', 'Holand')"); |
| query.exec("insert into person values(103, 'Lars', 'Gordon')"); |
| query.exec("insert into person values(104, 'Roberto', 'Robitaille')"); |
| query.exec("insert into person values(105, 'Maria', 'Papadopoulos')"); |
| |
| query.exec("create table items (id int primary key," |
| "imagefile int," |
| "itemtype varchar(20)," |
| "description varchar(100))"); |
| query.exec("insert into items " |
| "values(0, 0, 'Qt'," |
| "'Qt is a full development framework with tools designed to " |
| "streamline the creation of stunning applications and " |
| "amazing user interfaces for desktop, embedded and mobile " |
| "platforms.')"); |
| query.exec("insert into items " |
| "values(1, 1, 'Qt Quick'," |
| "'Qt Quick is a collection of techniques designed to help " |
| "developers create intuitive, modern-looking, and fluid " |
| "user interfaces using a CSS & JavaScript like language.')"); |
| query.exec("insert into items " |
| "values(2, 2, 'Qt Creator'," |
| "'Qt Creator is a powerful cross-platform integrated " |
| "development environment (IDE), including UI design tools " |
| "and on-device debugging.')"); |
| query.exec("insert into items " |
| "values(3, 3, 'Qt Project'," |
| "'The Qt Project governs the open source development of Qt, " |
| "allowing anyone wanting to contribute to join the effort " |
| "through a meritocratic structure of approvers and " |
| "maintainers.')"); |
| |
| query.exec("create table images (itemid int, file varchar(20))"); |
| query.exec("insert into images values(0, 'images/qt-logo.png')"); |
| query.exec("insert into images values(1, 'images/qt-quick.png')"); |
| query.exec("insert into images values(2, 'images/qt-creator.png')"); |
| query.exec("insert into images values(3, 'images/qt-project.png')"); |
| |
| return true; |
| } |
| //! [0] |
| |
| #endif |