How To Change data (setData) in EditableModel child on QSqlQueryModel ?

Taz742

this is mainwindow:

#include "mainwindow.h"
#include "ui_mainwindow.h"
#include "editablemodel.h"
#include "QSqlQuery"
#include "QDebug"

MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
    ui->setupUi(this);

    func();
}

MainWindow::~MainWindow()
{
    delete ui;
}

void MainWindow::refresh(){
    ui->ccc->setText("start");
}

void MainWindow::func(){
    amdb = QSqlDatabase::database("connect");

    if(amdb.isOpen()){
        qDebug() << amdb.databaseName();
    }else{
        qDebug() << "NO";
    }

    QSqlQuery query(amdb);

    query.prepare("SELECT * FROM valuta");

    query.exec();

    model->setQuery(query);

    model->setHeaderData(0, Qt::Horizontal, tr("იდი"));
    model->setHeaderData(1, Qt::Horizontal, tr("ვალუტის სახელი"));
    model->setHeaderData(2, Qt::Horizontal, tr("ფუნქცია"));

    ui->tableView->setModel(model);
    ui->tableView->verticalHeader()->hide();
    ui->tableView->setColumnWidth(1,170);
}

void MainWindow::on_pushButton_clicked()
{
    qDebug() << ui->ccc->text();
}

this ediatblemodel:

#include "editablemodel.h"
#include "QSqlQueryModel"
#include "QSqlQuery"
#include "mainwindow.h"
#include "QDebug"

EditAbleModel::EditAbleModel(QObject *parent) : QSqlQueryModel(parent)
{

}

Qt::ItemFlags EditAbleModel::flags(
        const QModelIndex &index) const
{
    Qt::ItemFlags flags = QSqlQueryModel::flags(index);
    if (index.column() == 0 || index.column() == 2)
        flags |= Qt::ItemIsEditable;
    return flags;
}

bool EditAbleModel::setData(const QModelIndex &index, const QVariant &value, int /* role */)
{
    if (index.column() < 1 || index.column() > 2)
        return false;

    QModelIndex primaryKeyIndex = QSqlQueryModel::index(index.row(),0);
    int id = data(primaryKeyIndex).toInt();

//    qDebug() << index.row() << " " << index.column() << "aaaa"<<endl;

    bool ok;
    if (index.column() == 1) {
        ok = setFirstName(id, value.toString());
    } else {
        ok = setLastName(id, value.toString());
    }

//    MainWindow* w = new MainWindow();

//    emit run();

//    connect(this,SIGNAL(run()),w,SLOT(refresh()));

    return ok;
}

void EditAbleModel::refresh()
{
 **DONT NEED THIS!!!!**
}

bool EditAbleModel::setFirstName(int personId, const QString &firstName)
{
    QSqlQuery query;
    query.prepare("update valuta set main = '1' where uid = '4'");
    query.addBindValue(firstName);
    query.addBindValue(personId);
    return query.exec();
}

bool EditAbleModel::setLastName(int personId, const QString &lastName)
{
    QSqlQuery query(amdb);

    qDebug() << personId << " " << lastName << endl;

    int lst = lastName.toInt();

    query.prepare("update valuta set main = :one where uid = :two ");
    query.bindValue(":one",lst);
    query.bindValue(":two",personId);
    return query.exec();
}

this main.cpp:

#include "mainwindow.h"
#include <QApplication>
#include "QSqlDatabase"
#include "QFileInfo"
#include "QDebug"

QSqlDatabase amdb;

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);

    amdb = QSqlDatabase::addDatabase("QSQLITE", "connect");

    amdb.setDatabaseName("C:/Users/tleladze/Desktop/valuta/VALUTA.sqlite");

    amdb.open();

    MainWindow w;

    w.show();

    return a.exec();
}

Taz742

I dont want refresh all database :(

mrjj

@Taz742
Hi
Its a bit unclear what actual error is.
It does save new data to database but the view is not showing it ?
Or which part is not working for you ?

SGaist

Hi,

To add to @mrjj, the implementation of setFirstName looks suspicious. You seem to want to use positional placeholders while your query isn't written for that.

Taz742

@mrjj Yes, it saves new data in database but form shows old numbers

mrjj

@Taz742

Ok, maybe you need to use the
http://doc.qt.io/qt-5/qabstractitemmodel.html#rowsAboutToBeRemoved
or some other function that fits the action you do to the data.

Currently, you just change the database behind its back
so I guess what is wrong is that it cannot know that. :)

Taz742

@mrjj
It does not have setQuery();

SGaist

QAbstractItemModel is the lowest base class of QSqlQueryModel.

Taz742

@SGaist
you are right.

So, I think it would be better TableWidget. I fill in the data manually.

What do you think? @SGaist , @mrjj

Taz742

I solved my problem.

QSqlQuery query;

query.prepare("SELECT * FROM VALUTA");

query.exec();

ui->tableWidget->setColumnCount(3);
ui->tableWidget->setRowCount(8);
ui->tableWidget->setHorizontalHeaderLabels(QStringList() << "იდ" << "სახელი" << "კურსი");
ui->tableWidget->verticalHeader()->hide();

int i = 0;

while(query.next()){
    int j = 0;
    while(j < 3){
        QTableWidgetItem* itm = new QTableWidgetItem(query.value(j).toString());
        ui->tableWidget->setItem(i,j,itm);

        if(j == 0){
            itm->setFlags(itm->flags() ^ Qt::ItemIsEditable); // **DISABLE EDIT**
        }

        j++;
    }
    i++;
}

But the concrete problem has not been reached.
I write as resolved?

mrjj

@Taz742
If you still have the view issue then leave it open :)

Taz742

@mrjj
Yes, I will leave open. I think This topical theme.

RajeeshRaveendran

Hi,

Did you forget to emit dataChanged() signal after value updated?
This signal is must if you need to reflect the changes on UI.

Taz742

Hi. @RajeeshRaveendran
YES, I've seen this signal.
But UI->, update, when it changes, model-> setData doing nothing.

mrjj

@Taz742
Did u try to call
emit dataChanged()
in setData ?

RajeeshRaveendran

Hi Taz,

I did not get you. Let me explain a little more. Simply you should modify your model class to

bool EditAbleModel::setData(const QModelIndex &index, const QVariant &value, int /* role */)
{
/// update the data to database/internal data storage
emit dataChanged(); /// So that UI (QML) know the change occurred in background and query the new value by calling data() method to update UI.
}

QVariant EditAbleModel::data(const QModelIndex &index, int role)
{
/// return your data as per custom db.
}

Taz742

@RajeeshRaveendran
Now I'm busy with something else and definitely I'll see into your answer.
thank for reply, and sorry english :))

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How To Change data (setData) in EditableModel child on QSqlQueryModel ?