Return empty quality instead of None in QualityManager::findQualityByQualityType

Contributes to CURA-2271

1 files changed, 5 insertions, 1 deletions

diff --git a/cura/QualityManager.py b/cura/QualityManager.py
index adf2f0423b..6deea4053e 100644
--- a/cura/QualityManager.py
+++ b/cura/QualityManager.py
@@ -20,6 +20,9 @@ class QualityManager:
 

     __instance = None

 

+    def __init__(self):

+        self._empty_quality_container = UM.Settings.ContainerRegistry.getInstance().findInstanceContainers(id = "empty_quality")[0]

+

     ##  Find a quality by name for a specific machine definition and materials.

     #

     #   \param quality_name

@@ -92,7 +95,8 @@ class QualityManager:
         if not result and material_containers and len(material_containers) == 1:

             basic_materials = self._getBasicMaterials(material_containers[0])

             result = self._getFilteredContainersForStack(machine_definition, basic_materials, **criteria)

-        return result[0] if result else None

+

+        return result[0] if result else self._empty_quality_container

 

     ##  Find all suitable qualities for a combination of machine and material.

     #