почему с QSqlRelationalTableModel данные не сохраняются?

class MyView: public QTableView {
Q_OBJECT
public:
    MyView(QWidget * parent = 0);
public slots:
    void saveData();
};

class MyWidget: public QWidget { 
Q_OBJECT
    QSqlRelationalTableModel *model;
    MyView *view;
public:
    MyWidget(QWidget *parent = 0);
};

MyWidget::MyWidget(QWidget *parent): QWidget(parent){
    QVBoxLayout * layout = new QVBoxLayout;
    setLayout(layout);

    model = new QSqlRelationalTableModel(this);
    model->setTable("testtable");
    model->setRelation(0, QSqlRelation("dict", "dict_id", "name"));
    model->select(); 
    model->setEditStrategy(QSqlTableModel::OnManualSubmit);

    view = new MyView;
    view->setModel(model);
    view->setItemDelegate(new QSqlRelationalDelegate(view));
    layout->addWidget(view,5);

    QPushButton *bSave = new QPushButton(QObject::tr("&Сохранить"));
    QObject::connect(bSave,SIGNAL(clicked()),view,SLOT(saveData()));
    layout->addWidget(bSave,1);
}

MyView::MyView(QWidget *parent): QTableView(parent){}

void MyView::saveData(){
    if(((QSqlTableModel *) model())->submitAll()) qDebug() << "ok" ;
}

CREATE TABLE "dict" (    
    "dict_id" integer NOT NULL PRIMARY KEY AUTOINCREMENT,
    "name" varchar(20) NOT NULL
);
CREATE TABLE "testtable" (
    "dict_id" integer,
    "value" real NOT NULL,
    FOREIGN KEY(dict_id) REFERENCES dict
);

INSERT INTO dict ("name") VALUES ("A");
INSERT INTO dict ("name") VALUES ("B");

INSERT INTO testtable VALUES ("1",2.2);
INSERT INTO testtable VALUES ("2",6.6);