From c6afb14a091e891b60cfb2e56bf53c19bd4c4bf9 Mon Sep 17 00:00:00 2001
From: Arjen Hiemstra <ahiemstra@heimr.nl>
Date: Mon, 10 Oct 2016 13:34:45 +0200
Subject: [PATCH] Return the empty container if there are no results when
 listing qualities

Contributes to CURA-2271
---
 cura/QualityManager.py | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/cura/QualityManager.py b/cura/QualityManager.py
index 6deea4053e..a304eb1db3 100644
--- a/cura/QualityManager.py
+++ b/cura/QualityManager.py
@@ -109,6 +109,10 @@ class QualityManager:
         if not result:
             basic_materials = self._getBasicMaterials(material_container)
             result = self._getFilteredContainersForStack(machine_definition, basic_materials, **criteria)
+
+        if not result:
+            result = [ self._empty_quality_container ]
+
         return result
 
     ##  Find all quality changes for a machine.