Do not ignore error when inserting rows in 'Duplicate record'

That avoids overwriting existing record as reported in issue #1255.

This doesn't improve the underlying situation, that is inserting empty rows
before duplicating the content. But it is safer to not ignore the error in
the initial row insertion.

src/MainWindow.cpp

@@ -192,7 +192,7 @@ void MainWindow::init()
     connect(dittoRecordShortcut, &QShortcut::activated, [this]() {
         int currentRow = ui->dataTable->currentIndex().row();
         auto row = m_browseTableModel->dittoRecord(currentRow);
-        ui->dataTable->setCurrentIndex(row);
+        duplicateRecord(currentRow);
     });
 
     // Add menu item for log dock
@@ -2450,7 +2450,7 @@ void MainWindow::showRecordPopupMenu(const QPoint& pos)
     popupRecordMenu.addAction(action);
 
     connect(action, &QAction::triggered, [&]() {
-       m_browseTableModel->dittoRecord(row);
+            duplicateRecord(row);
     });
 
     popupRecordMenu.exec(ui->dataTable->verticalHeader()->mapToGlobal(pos));
@@ -2767,3 +2767,12 @@ void MainWindow::saveFilterAsView()
     else
         QMessageBox::information(this, qApp->applicationName(), tr("There is no filter set for this table. View will not be created."));
 }
+
+void MainWindow::duplicateRecord(int currentRow)
+{
+    auto row = m_browseTableModel->dittoRecord(currentRow);
+    if (row.isValid())
+        ui->dataTable->setCurrentIndex(row);
+    else
+        QMessageBox::warning(this, qApp->applicationName(), db.lastError());
+}

src/MainWindow.h

@@ -191,6 +191,7 @@ class MainWindow : public QMainWindow
     void enableEditing(bool enable_edit, bool enable_insertdelete);
     void loadExtensionsFromSettings();
     void saveAsView(QString query);
+    void duplicateRecord(int currentRow);
 
     sqlb::ObjectIdentifier currentlyBrowsedTableName() const;
 

src/sqlitetablemodel.cpp

@@ -512,7 +512,9 @@ QModelIndex SqliteTableModel::dittoRecord(int old_row)
     if(!isEditable())
         return QModelIndex();
 
-    insertRow(rowCount());
+    if (!insertRow(rowCount()))
+        return QModelIndex();
+
     int firstEditedColumn = 0;
     int new_row = rowCount() - 1;