sqlite查询返回结果为空？ [复制链接]

qDebug 输出数据结果行数为0，但连接没提示错误？




    db = QSqlDatabase::addDatabase("QSQLITE", "main");    db.setDatabaseName("qt_sqlite_test.db");    if(!db.open())    {        QMessageBox::critical(NULL, QObject::tr("Collection"), QObject::tr("数据库连接失败！"));    }    QSqlQueryModel *model = new QSqlQueryModel;    model->setQuery("SELECT * FROM apply",db);    qDebug()<<(model->rowCount());    QTableView *view = new QTableView;    view->setWindowTitle("QSqlQueryModel");    view->setModel(model);    view->show();