public function prepareData()
{
$d = new T1();
$d->t1_id = 1;
$d->t2_id = 1;
$d->save();
$d = new T2();
$d->t2_id = 1;
$d->hello_id = 10;
$d->save();
for ($i = 0; $i < 10; $i++) {
$t3 = new T3();
$t3->hello_id = 10;
$t3->save();
}
}
