QSqlTableModel access trought object name

[gfxx]

I would like to use about 20 QSqlTableModels in my code... I need to call them in different places from gui actions... so I declared the QSqlTableModels in my mainwindows.h file, initialize them in mainwindows.cpp and later call them with the setobjectname method.... but the app work perfect only first time .... did I misunderstand something?

my mainwindows.h file:

private:
    Ui::MainWindow *ui;
    Login *m_login;
    QSqlTableModel *model;
    QSqlTableModel *model_1;
    QSqlTableModel *model_2;
    QSqlTableModel *modelT_1;
    QSqlTableModel *modelT_2;
    QSqlTableModel * stkSqlViewLb;

mainwindows.cpp:

MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
    ui->setupUi(this);


    model_1 = new QSqlTableModel(this, QSqlDatabase::database("db"));
    model_2 = new QSqlTableModel(this, QSqlDatabase::database("db"));
    modelT_1 = new QSqlTableModel(this, QSqlDatabase::database("db"));
    modelT_2 = new QSqlTableModel(this, QSqlDatabase::database("db"));
stkSqlViewLb = new QSqlTableModel(this, QSqlDatabase::database("db"));

my call test :

void MainWindow::sqlView(){
    QObject* shSqlView = sender();
    QString nSqlView = shSqlView->objectName();
    nSqlView.remove("pbtn_test_");
    int valSqlView = nSqlView.toInt();
    QString chSqlView = "tableView_O_" + QString::number(valSqlView);
    QTableView * stkSqlView = this->findChild<QTableView *>(chSqlView);

     switch (valSqlView) {
        case 1:
            stkSqlViewLb = model_1;
            break;
        case 2:
            stkSqlViewLb = model_2;
            break;
        default:
            break;
        }
    stkSqlViewLb->setTable("testTable");

what is my error? What not understand?
Appreciate any help ...

regards

[JonB]

@gfxx
If you say it crashes what is the stack trace in a debugger? Maybe shSqlView is nullptr, how do we know? Maybe stkSqlView is nullptr? stkSqlViewLb is an uninitialized variable. The last part of your code does not seem related to the first part.

First use a debugger, then post a minimal example.

[gfxx]

@JonB correct ... forget a row .... problem was need to use model_2, model_1 etc in a lot of void so need to call them as per objectname .... tomorrow try with debugger ....

[gfxx]

@JonB ok found my code (I update the example) is correct if inizialize all QSqlTableModel ...... problem: because need change QSqlTableModel every gui action not find a way to write correctly ....

stkSqlViewLb = model_2;

in sqlView void I try to tranform stkSqlViewLb to declared QSqlTableModel or "model_1", "model_2" etc etc ... these because I would use a model every tableView ....

Actually with revised code all work perfect only to a first call of sqlView .... after can see only white tableView .... think because QSqlTableModel not match.