From d34e3ef022c0fb2b90a042f0d778b8fc541c3aaf Mon Sep 17 00:00:00 2001
From: Jean-Francois Dockes <jf@dockes.org>
Date: Wed, 6 Mar 2019 16:53:47 +0100
Subject: [PATCH] GUI: show error dialog when trying to sort by inverse
 relevance

---
 src/qtgui/restable.cpp | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/qtgui/restable.cpp b/src/qtgui/restable.cpp
index 455f3ec1..23110ff3 100644
--- a/src/qtgui/restable.cpp
+++ b/src/qtgui/restable.cpp
@@ -435,6 +435,12 @@ void RecollModel::sort(int column, Qt::SortOrder order)
     DocSeqSortSpec spec;
     if (column >= 0 && column < int(m_fields.size())) {
 	spec.field = m_fields[column];
+        if (!stringlowercmp("relevancyrating", spec.field) &&
+            order != Qt::AscendingOrder) {
+            QMessageBox::warning(0, "Recoll", 
+                                 tr("Can't sort by inverse relevance"));
+            return;
+        }
 	if (!stringlowercmp("date", spec.field) || 
 	    !stringlowercmp("datetime", spec.field))
 	    spec.field = "mtime";