Fix deleting children in MappingTreeModel

Deleting children tried to remove it from mappings instead of
mappings_parents2. The mapping itself should not be deleted.

1 files changed, 3 insertions, 1 deletions

diff --git a/mappingtreewidget.cpp b/mappingtreewidget.cpp
index 92366e0..7e62ba3 100644
--- a/mappingtreewidget.cpp
+++ b/mappingtreewidget.cpp
@@ -18,6 +18,7 @@
 #include <QHideEvent>
 #include <QAction>
 #include <QMenu>
+#include <QSqlError>
 
 #include <algorithm>
 
@@ -142,7 +143,8 @@ void MappingTreeWidget::deleteChild(){
     int retval = QMessageBox::question(this, tr("Question"), question, QMessageBox::Yes | QMessageBox::No);
     if(retval == QMessageBox::Yes){
         if(!mModel->deleteChild(real)){
-            QString msg = QString(tr("Failed to delete %1. Most likely there are still items mapped.")).arg(real.data().toString());
+            QSqlError last = mModel->lastError();
+            QString msg = QString(tr("Failed to delete %1. Database said: %2")).arg(real.data().toString()).arg(last.text());
             QMessageBox::critical(this, tr("Error"), msg);
         }
     }