(Another) segmentation fault

Notice also the sentence in docs:

Quote:

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If connectionName does not exist in the list of databases, 0 is returned.

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So add a check for null pointer:

Code:

---

void GlavnoO::pushButton3_clicked()
{
	bool ok = FALSE;
	QSqlDatabase *baza = QSqlDatabase::database();
	if (baza)
	{
		ok = baza->isOpen();
	}
}

---

Yep, that solves the segmentation fault. But I would still like to know how to acces databse connection which I opened in another form.

Quote:

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Originally Posted by Lebowski

And I have to use pointers

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Sure, you're using Qt3 and I was looking at Qt4 docs.

Quote:

---

But I would still like to know how to acces databse connection which I opened in another form.

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First check if addDatabase returns a valid database handle.

I did check with this code in form povezava (povezava.ui.h):

Code:

---

bool ok = baza->open();
    if (!ok) {QMessageBox::warning (this, "Pozor!!!!!!!!!!!", "not working",1,0,0);}
	else  {
	QMessageBox::information ( this, "Uspeh!!!!!!!!!", "working",1,0,0 );
	close();
    };

---

And it certainly works.

But now I need to access it from a different form, from file glavnoo.ui.h.

So why don't you use QSqlDatabase::database()?

I am using that.

Code:

---

void GlavnoO::test_clicked()
{
    bool ok = FALSE;
    QSqlDatabase *baza = QSqlDatabase::database();
    if (baza) {
	ok = baza->isOpen();
    };

---

Originally it was without 'if (baza) ...' statement.

So what's wrong with that? The form you use it in doesn't matter. You can use QSqlDatabase::database() from anywhere. Just makesure addDatabase() has been invoked earlier.

Yep, it does work now!! Thanx all. :)

Seems I was missing QSqlDatabase::database() statement so my 'baza' pointer had a random value.