1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
|
/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the demonstration applications of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the Technology Preview License Agreement accompanying
** this package.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain
** additional rights. These rights are described in the Nokia Qt LGPL
** Exception version 1.1, included in the file LGPL_EXCEPTION.txt in this
** package.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
**
**
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#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
|
