I am attempting to use a “subclassed” QSqlRelationalTableModel object that I wish to use to update a Sqlite view (which passes an update to a table via an “instead-of” trigger.)
I have the following code:
SqlRelationalTableModel.hpp:
#ifndef _SQLRELATIONALTABLEMODEL_HPP_
#define _SQLRELATIONALTABLEMODEL_HPP_
#include <QModelIndex>
#include <QSqlRelationalTableModel>
class SqlRelationalTableModel : public QSqlRelationalTableModel {
Q_OBJECT
public:
SqlRelationalTableModel(
QObject *parent = (QObject *)0
, QSqlDatabase db = QSqlDatabase());
QString selectStatement() const;
bool insertRow(int row, const QModelIndex &parent = QModelIndex());
bool removeRow(int row, const QModelIndex &parent = QModelIndex());
private slots:
bool submit();
signals:
void dataSubmitted();
};
#endif // _SQLRELATIONALTABLEMODEL_HPP_
SqlRelationalTableModel.cpp:
#include <QtGui>
#include <QtSql>
#include <QDebug>
#include "SqlRelationalTableModel.hpp"
SqlRelationalTableModel::SqlRelationalTableModel(
QObject *parent, QSqlDatabase db)
: QSqlRelationalTableModel(parent, db) {
// intentionally empty function
}
QString SqlRelationalTableModel::selectStatement() const {
return QSqlRelationalTableModel::selectStatement();
}
bool SqlRelationalTableModel::insertRow(int row, const QModelIndex &parent) {
bool isRunningOkay = true;
isRunningOkay = QSqlRelationalTableModel::insertRow(row, parent);
emit dataSubmitted();
return isRunningOkay;
}
bool SqlRelationalTableModel::removeRow(int row, const QModelIndex &parent) {
bool isRunningOkay = true;
isRunningOkay = QSqlRelationalTableModel::removeRow(row, parent);
emit dataSubmitted();
return isRunningOkay;
}
bool SqlRelationalTableModel::submit() {
bool isRunningOkay = QSqlRelationalTableModel::submit();
emit dataSubmitted();
return isRunningOkay;
}
ItemForm.cpp
inItemModel = new SqlRelationalTableModel(this);
inItemModel->setTable("inItemMapView");
inItemModel->setRelation(
InItemMapView_CategoryId
// , QSqlRelation("inCategoryMapView", "categoryId", "categoryName"));
, QSqlRelation("inCategoryMapView", "categoryId", "categoryId"));
inItemModel->setSort(InItemMapView_ItemName, Qt::AscendingOrder);
inItemModel->setHeaderData(InItemMapView_ItemName, Qt::Horizontal, tr("Item"));
inItemModel->setHeaderData(InItemMapView_CategoryId, Qt::Horizontal, tr("Category"));
inItemModel->setEditStrategy(QSqlTableModel::OnRowChange);
inItemModel->select();
inItemView = new TableView(this);
inItemView->setModel(inItemModel);
inItemView->setItemDelegate(new QSqlRelationalDelegate(inItemView));
The above does allow an update when editing the view, but it shows the categoryId which is an ugly UUID instead of the categoryName. When I comment that out and instead set the relation to categoryName, it does not keep my edits. Nor does it let me delete. Inserts work though, for some reason.
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