QT requested database does not belong to the calling thread.线程中查询数据报错

QT requested database does not belong to the calling thread.线程中查询数据报错

QString name = "ttx";

QSqlQueryModel* sql_model;

 QString sql_comm = QString("select * from dssb_moddve_loddt_tab where name='%1'").arg(name);

sql_model->setQuery(sql_comm);//错误
sql_model->setQuery(sql_comm, db);//正确，指定数据库连接

sql_model数据放入tableView控件

m_sqlDataBase是连接数据库的名字

QSqlDatabase m_sqlDataBase;

QString sql="select * from user_tab";
QSqlQuery query(sql, m_sqlDataBase);    //创建query时，指定数据库连接
if(!query.exec()){
    qWarning()<<"query error,"<<m_sqlDataBase.lastError();
    return;
}