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50
51#ifndef DATABASE_H
52#define DATABASE_H
53
54#include <QMessageBox>
55#include <QSqlDatabase>
56#include <QSqlError>
57#include <QSqlQuery>
58
59static bool createConnection()
60{
61 QSqlDatabase db = QSqlDatabase::addDatabase(type: "QSQLITE");
62 db.setDatabaseName(":memory:");
63 if (!db.open()) {
64 QMessageBox::critical(parent: nullptr, title: QObject::tr(s: "Cannot open database"),
65 text: QObject::tr(s: "Unable to establish a database connection.\n"
66 "This example needs SQLite support. Please read "
67 "the Qt SQL driver documentation for information how "
68 "to build it.\n\n"
69 "Click Cancel to exit."), buttons: QMessageBox::Cancel);
70 return false;
71 }
72
73 QSqlQuery query;
74
75 query.exec(query: "create table artists (id int primary key, "
76 "artist varchar(40), "
77 "albumcount int)");
78
79 query.exec(query: "insert into artists values(0, '<all>', 0)");
80 query.exec(query: "insert into artists values(1, 'Ane Brun', 2)");
81 query.exec(query: "insert into artists values(2, 'Thomas Dybdahl', 3)");
82 query.exec(query: "insert into artists values(3, 'Kaizers Orchestra', 3)");
83
84 query.exec(query: "create table albums (albumid int primary key, "
85 "title varchar(50), "
86 "artistid int, "
87 "year int)");
88
89 query.exec(query: "insert into albums values(1, 'Spending Time With Morgan', 1, "
90 "2003)");
91 query.exec(query: "insert into albums values(2, 'A Temporary Dive', 1, 2005)");
92 query.exec(query: "insert into albums values(3, '...The Great October Sound', 2, "
93 "2002)");
94 query.exec(query: "insert into albums values(4, 'Stray Dogs', 2, 2003)");
95 query.exec(query: "insert into albums values(5, "
96 "'One day you`ll dance for me, New York City', 2, 2004)");
97 query.exec(query: "insert into albums values(6, 'Ompa Til Du D\xc3\xb8r', 3, 2001)");
98 query.exec(query: "insert into albums values(7, 'Evig Pint', 3, 2002)");
99 query.exec(query: "insert into albums values(8, 'Maestro', 3, 2005)");
100
101 return true;
102}
103
104#endif
105
106
107

source code of qtbase/examples/sql/masterdetail/database.h