qtbase-opensource-src/examples/sql/masterdetail/database.h

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4.5 KiB
C

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#ifndef DATABASE_H
#define DATABASE_H
#include <QMessageBox>
#include <QSqlDatabase>
#include <QSqlError>
#include <QSqlQuery>
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 artists (id int primary key, "
"artist varchar(40), "
"albumcount int)");
query.exec("insert into artists values(0, '<all>', 0)");
query.exec("insert into artists values(1, 'Ane Brun', 2)");
query.exec("insert into artists values(2, 'Thomas Dybdahl', 3)");
query.exec("insert into artists values(3, 'Kaizers Orchestra', 3)");
query.exec("create table albums (albumid int primary key, "
"title varchar(50), "
"artistid int, "
"year int)");
query.exec("insert into albums values(1, 'Spending Time With Morgan', 1, "
"2003)");
query.exec("insert into albums values(2, 'A Temporary Dive', 1, 2005)");
query.exec("insert into albums values(3, '...The Great October Sound', 2, "
"2002)");
query.exec("insert into albums values(4, 'Stray Dogs', 2, 2003)");
query.exec("insert into albums values(5, "
"'One day you`ll dance for me, New York City', 2, 2004)");
query.exec("insert into albums values(6, 'Ompa Til Du D\xc3\xb8r', 3, 2001)");
query.exec("insert into albums values(7, 'Evig Pint', 3, 2002)");
query.exec("insert into albums values(8, 'Maestro', 3, 2005)");
return true;
}
#endif