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<pre> /****************************************************************************
**
** Copyright (C) 2005-2006 Trolltech ASA. All rights reserved.
**
** This file is part of the demonstration applications of the Qt Toolkit.
**
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** License version 2.0 as published by the Free Software Foundation
** and appearing in the file LICENSE.GPL included in the packaging of
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#ifndef INITDB_H
#define INITDB_H
#include <QtSql>
void addBook(QSqlQuery &q, const QString &title, int year, const QVariant &authorId,
const QVariant &genreId, int rating)
{
q.addBindValue(title);
q.addBindValue(year);
q.addBindValue(authorId);
q.addBindValue(genreId);
q.addBindValue(rating);
q.exec();
}
QVariant addGenre(QSqlQuery &q, const QString &name)
{
q.addBindValue(name);
q.exec();
return q.lastInsertId();
}
QVariant addAuthor(QSqlQuery &q, const QString &name, const QDate &birthdate)
{
q.addBindValue(name);
q.addBindValue(birthdate);
q.exec();
return q.lastInsertId();
}
QSqlError initDb()
{
QSqlDatabase db = QSqlDatabase::addDatabase("QSQLITE");
db.setDatabaseName(":memory:");
if (!db.open())
return db.lastError();
QStringList tables = db.tables();
if (tables.contains("books", Qt::CaseInsensitive)
&& tables.contains("authors", Qt::CaseInsensitive))
return QSqlError();
QSqlQuery q;
if (!q.exec(QLatin1String("create table books(id integer primary key, title varchar, author integer, genre integer, year integer, rating integer)")))
return q.lastError();
if (!q.exec(QLatin1String("create table authors(id integer primary key, name varchar, birthdate date)")))
return q.lastError();
if (!q.exec(QLatin1String("create table genres(id integer primary key, name varchar)")))
return q.lastError();
if (!q.prepare(QLatin1String("insert into authors(name, birthdate) values(?, ?)")))
return q.lastError();
QVariant asimovId = addAuthor(q, QLatin1String("Isaac Asimov"), QDate(1920, 2, 1));
QVariant greeneId = addAuthor(q, QLatin1String("Graham Greene"), QDate(1904, 10, 2));
QVariant pratchettId = addAuthor(q, QLatin1String("Terry Pratchett"), QDate(1948, 4, 28));
if (!q.prepare(QLatin1String("insert into genres(name) values(?)")))
return q.lastError();
QVariant sfiction = addGenre(q, QLatin1String("Science Fiction"));
QVariant fiction = addGenre(q, QLatin1String("Fiction"));
QVariant fantasy = addGenre(q, QLatin1String("Fantasy"));
if (!q.prepare(QLatin1String("insert into books(title, year, author, genre, rating) values(?, ?, ?, ?, ?)")))
return q.lastError();
addBook(q, QLatin1String("Foundation"), 1951, asimovId, sfiction, 3);
addBook(q, QLatin1String("Foundation and Empire"), 1952, asimovId, sfiction, 4);
addBook(q, QLatin1String("Second Foundation"), 1953, asimovId, sfiction, 3);
addBook(q, QLatin1String("Foundation's Edge"), 1982, asimovId, sfiction, 3);
addBook(q, QLatin1String("Foundation and Earth"), 1986, asimovId, sfiction, 4);
addBook(q, QLatin1String("Prelude to Foundation"), 1988, asimovId, sfiction, 3);
addBook(q, QLatin1String("Forward the Foundation"), 1993, asimovId, sfiction, 3);
addBook(q, QLatin1String("The Power and the Glory"), 1940, greeneId, fiction, 4);
addBook(q, QLatin1String("The Third Man"), 1950, greeneId, fiction, 5);
addBook(q, QLatin1String("Our Man in Havana"), 1958, greeneId, fiction, 4);
addBook(q, QLatin1String("Guards! Guards!"), 1989, pratchettId, fantasy, 3);
addBook(q, QLatin1String("Night Watch"), 2002, pratchettId, fantasy, 3);
addBook(q, QLatin1String("Going Postal"), 2004, pratchettId, fantasy, 3);
return QSqlError();
}
#endif</pre>
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