{solved}Trying to test a qtsqlite database, experiencing strange issues

First of here is my code:

Code:

---

#include "dbmanager.h"
#include<qdebug.h>
 
 
dbManager::dbManager()
{
    db = QSqlDatabase::addDatabase("QSQLITE");
    db.setDatabaseName("Decoders.db");
 
    if(!db.open())
        qDebug() << "Not connected to DB.";
    else if(db.open())
        qDebug() << "Connected to DB.";
}
void dbManager::nametest()
{
 
    QSqlQuery query;
 
        query.prepare("SELECT name FROM Restaurant");
        int idName = query.record().indexOf("name");
        if(query.exec())
        {
            while(query.next())
            {
              QString name =query.value(idName).toString();
              qDebug() << name;
            }
        }
        else
        {
            qDebug() << query.lastError();
        }
 
}

---

The problem: I made a table called restaurant is sqlite studio, I am testing to just print the first couple names from the database to the console.
I have done this exact type of thing in a previous project with zero problems yet here it doesn't work at all. It just outputs this: "QSqlError("", "Unable to fetch row", "No query")" whenever I run the test method I have above
I have triple checked that I my prepare statement has the correct column names and everything. Any help would be great.

Edit: changed this

db.setDatabaseName("../Database/Decoders.sqlite");

Having the database file with the source code was the issue, having it in a different directory fixed the problem