QSqlTableModel does not work

[lincoln]

How about friends, I have the following problem.

I have a QTableView and I want to set a model through QSqlTableModel, but when I do nothing appears in the tableview, this happens to me with version 12 of postgresql, but when I change to version 11, everything goes well, someone knows why it doesn't work with one version and the other if.

#include "dialog.h"
#include "ui_dialog.h"
#include <QSqlDatabase>
#include <qsqlerror.h>
#include <QSqlTableModel>
#include <QMessageBox>
Dialog::Dialog(QWidget *parent)
  : QDialog(parent), ui(new Ui::Dialog)
{
  ui->setupUi(this);
  QSqlDatabase db=QSqlDatabase::addDatabase("QPSQL");
  if(!db.isDriverAvailable("QPSQL"))
    {
      QMessageBox::critical(nullptr,qApp->applicationName(),
                            "Error al cargar el controlador.\n"+
                            db.lastError().text());
      return;
    }
  db.setPort(5433);
  db.setHostName("127.0.0.1");
  db.setDatabaseName("ejemplo");
  db.setUserName("postgres");
  db.setPassword("12345678");
  if(!db.open())
    {
      QMessageBox::critical(nullptr,qApp->applicationName(),
                            "Error al abrir la base de datos.\n"+
                            db.lastError().text());
      return;
    }
  QSqlTableModel *model=new QSqlTableModel(this);
  model->setTable("usuario");
  model->select();
  ui->tableView->setModel(model);
}

Dialog::~Dialog()
{
  delete ui;
}

I already added the necessary libraries to make it work, I mean:

libeay32.dll, libiconv-2.dll, libintl-8.dll, libpq.dll, ssleay32.dll

as I said it works perfectly with version 11, but with 12 no, any suggestions, thanks.

[JonB]

@lincoln
I think that recently there was a thread in this forum, stating that because of a bug some version of Qt does not work with some version of postgresql, and I think it was around the version numbers you will be using.

Search this forum for postgresql, and I think you will find it, it's within the last month I believe....

[skoczian]

@JonB Quite right: QTBUG-79033. More of a change in PostgreSQL 12 than a Qt bug, I think, but enough to make QSqlTableModel unusable with PostgreSQL 12 for the time being.