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// file : qt/driver.cxx
// author : Constantin Michael <constantin@codesynthesis.com>
// copyright : not copyrighted - public domain
#include <iostream>
#include <odb/database.hxx>
#include <odb/session.hxx>
#include <odb/transaction.hxx>
#include "database.hxx" // create_database
#include "employee.hxx"
#include "employee-odb.hxx"
using namespace std;
using namespace odb::core;
ostream& operator << (ostream& os, const QString& s)
{
return os << s.toStdString ();
}
int
main (int argc, char* argv[])
{
try
{
auto_ptr<database> db (create_database (argc, argv));
// Create a few persistent objects.
//
{
// Simple Tech Ltd.
//
{
QSharedPointer<employer> er (new employer ("Simple Tech Ltd"));
QSharedPointer<employee> john (
new employee ("John",
"Doe",
QDate (1974, 5, 23),
QByteArray ("\0xF1\0x00\0x34\0x45\0x00\0xDE", 6),
er));
QSharedPointer<employee> jane (
new employee ("Jane",
"Doe",
QDate (1983, 1, 18),
QByteArray ("\0xD7\0x00\0x14", 3),
er));
// Set the inverse side of the employee-employer relationship.
//
er->employees ().push_back (john);
er->employees ().push_back (jane);
transaction t (db->begin ());
db->persist (er);
db->persist (john);
db->persist (jane);
t.commit ();
}
// Complex Systems Inc.
//
{
QSharedPointer<employer> er (new employer ("Complex Systems Inc"));
QSharedPointer<employee> john (
new employee ("John",
"Smith",
QDate (1954, 8, 1),
QByteArray ("\0x23\0xFD\0x8F\0x00", 4),
er));
QSharedPointer<employee> jane (
new employee ("Jane",
"Smith",
QDate (1976, 12, 31),
QByteArray ("0x00\0x32\0x00\0x01\0x00", 5),
er));
// Set the inverse side of the employee-employer relationship.
//
er->employees ().push_back (john);
er->employees ().push_back (jane);
transaction t (db->begin ());
db->persist (er);
db->persist (john);
db->persist (jane);
t.commit ();
}
}
// Load Simple Tech Ltd and print its employees.
//
{
session s;
transaction t (db->begin ());
QSharedPointer<employer> stl (db->load<employer> ("Simple Tech Ltd"));
employees& es (stl->employees ());
for (employees::iterator i (es.begin ()); i != es.end (); ++i)
{
QLazyWeakPointer<employee>& lwp (*i);
// Load and lock the employee and his employer.
//
QSharedPointer<employee> p (lwp.load ());
QSharedPointer<employer> pe (p->employer ().load ());
cout << p->first () << " " << p->last () << endl
<< " born: " << p->born ().toString () << endl
<< " public key length: " << p->public_key ().size () << endl
<< " employer: "
<< pe->name ().toAscii ().data () << endl;
cout << endl;
}
t.commit ();
}
// Search for Complex Systems Inc employees.
//
{
typedef odb::query<employee> query;
typedef odb::result<employee> result;
session s;
transaction t (db->begin ());
result r (db->query<employee> (
query::employer::name == "Complex Systems Inc"));
for (result::iterator i (r.begin ()); i != r.end (); ++i)
cout << i->first () << " " << i->last () << endl;
t.commit ();
}
}
catch (const odb::exception& e)
{
cerr << e.what () << endl;
return 1;
}
}
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