cant create table in Database

[Thejas]

I have created a PSQL database using Qt by following code section

QSqlDatabase db=QSqlDatabase::addDatabase("QPSQL");
    QSqlQuery query;

    QCoreApplication a(argc, argv);

    db.setPort(5432);
    db.setHostName("localhost");
    db.setUserName("postgres");
    db.setPassword("root");
    if(db.open())
    {
        if(!query.exec("CREATE DATABASE newdb"))
            {
                qDebug()<<"Error creating DB:"<<db.lastError().text()<<endl;
            }
        else
            {
                qDebug()<<"New Database created"<<endl;
            }
    }
    else
        qDebug()<<db.lastError().text()<<endl;

    db.close();

    if(db.open())
    {
           db.setDatabaseName("newdb");
           qDebug()<<"name of database:"<<db.databaseName()<<endl;
           if(query.exec("create table gateway "
                 "(macid varchar(17) primary key , "
                 "mode char, "
                 "status integer, "
                 "health char)"))
           {
               qDebug()<<"gateway table created\n"<<endl;
           }
           else
           {
               qDebug()<<"gateway table  failed\n"<<query.lastError().text()<<endl;
           }
    }

but the problem is when i create table inside mydb database it is creating tables in default postgres database

please help me

[jsulm]

@Thejas Shouldn't you call db.setDatabaseName("newdb"); before db.open() ?
See documentation http://doc.qt.io/qt-5/qsqldatabase.html#setDatabaseName
"Sets the connection's database name to name. To have effect, the database name must be set before the connection is opened."

[Thejas]

thanks man i missed that particular part in doc
thank you.. :)

here is my working code

    QSqlDatabase db=QSqlDatabase::addDatabase("QPSQL");
    QSqlQuery query;

    QCoreApplication a(argc, argv);

    db.setPort(5432);
    db.setHostName("localhost");
    db.setUserName("postgres");
    db.setPassword("root");
    if(db.open())
    {
        if(!query.exec("CREATE DATABASE newdb"))
            {
                qDebug()<<"Error creating DB:"<<db.lastError().text()<<endl;
            }
        else
            {
                qDebug()<<"New Database created"<<endl;
            }
    }
    else
        qDebug()<<db.lastError().text()<<endl;

    db.close();
    db.setDatabaseName("newdb");  /*it is the fix */
    if(db.open())
    {

//           db.setDatabaseName("newdb");/*move to before db.open*/

           qDebug()<<"name of database:"<<db.databaseName()<<endl;
           if(query.exec("create table gateway "
                 "(macid varchar(17) primary key , "
                 "mode char, "
                 "status integer, "
                 "health char)"))
           {
               qDebug()<<"gateway table created\n"<<endl;
           }
           else
           {
               qDebug()<<"gateway table  failed\n"<<query.lastError().text()<<endl;
           }
    }