db driver not loaded

[mak_user]

Hi,

I have to separate test projects with almost the same code. PostgreSQL driver is loaded in one of them only. Could You help me?

It is loaded here:

#include <QtGui/QApplication>
#include <QtSql>
#include <QMessageBox>
 
#include "dialog.h"
 
 
int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
 
    QSqlDatabase db = QSqlDatabase::addDatabase("QPSQL7");
    qDebug() << "DRIVERS :" << QSqlDatabase::drivers();
 
    DB_test_Dialog w;
    w.show();
 
    return a.exec();
}

#include <QtGui/QApplication>
#include <QtSql>
#include <QMessageBox>

#include "dialog.h"


int main(int argc, char *argv[])
{
    QApplication a(argc, argv);

    QSqlDatabase db = QSqlDatabase::addDatabase("QPSQL7");
    qDebug() << "DRIVERS :" << QSqlDatabase::drivers();

    DB_test_Dialog w;
    w.show();

    return a.exec();
}

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with this drivers
DRIVERS : ("QSQLITE", "QODBC3", "QODBC", "QPSQL7", "QPSQL")


and not loaded here:

#include <QtGui/QApplication>
#include <QtSql>
#include <QMessageBox>
 
#include "widget.h"
 
int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
 
    QSqlDatabase db = QSqlDatabase::addDatabase("QPSQL");
    qDebug() << "DRIVERS :" << QSqlDatabase::drivers();
 
    Widget w;
    w.show();
 
    return a.exec();
}

#include <QtGui/QApplication>
#include <QtSql>
#include <QMessageBox>

#include "widget.h"

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);

    QSqlDatabase db = QSqlDatabase::addDatabase("QPSQL");
    qDebug() << "DRIVERS :" << QSqlDatabase::drivers();

    Widget w;
    w.show();

    return a.exec();
}

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with this message:
QSqlDatabase: QPSQL driver not loaded
QSqlDatabase: available drivers: QSQLITE QMYSQL3 QMYSQL
DRIVERS : ("QSQLITE", "QMYSQL3", "QMYSQL")

I use the same enviroment.

---

Added after 57 minutes:

OK. It is a path issue. Once I add

a.addLibraryPath("path");

a.addLibraryPath("path");

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I get all drivers and no error message issued.
I am using QT creator for building. Where can I set these paths? Why one of the test projects works correctly?

[Lykurg]

Where is the QPSQL7 plugin located on your disk?