So, am I nut or what? This time submitAll failed and first qDebug() we have
Qt Code: 
  1. QSqlQueryModel::lastError returned {...}
  2. QSqlError::text returned {" " size=1}
To copy to clipboard, switch view to plain text mode 
and after second qDebug() we have:
Qt Code: 
  1. QSqlQueryModel::query returned	{...}
  2. QSqlQuery::lastQuery returned	{"SELECT stranka.SIFRA,stranka.DS,stranka.PRIIMEK,stranka.IME,ulica.naziv,stranka.STEVILKA_ULICE,kraj.naziv_kraja FROM stranka,u" size=217}
To copy to clipboard, switch view to plain text mode 

What is going on?