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Return empty node if preferred node couldn't be found

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Or any node, really. There must now always be a subnode.

Contributes to issue CURA-6600.
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Ghostkeeper 2019-08-22 16:52:38 +02:00
parent d06ce211ff
commit 9dca6c0127
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1 changed files with 2 additions and 2 deletions
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4
cura/Machines/VariantNode.py
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@ -76,11 +76,11 @@ class VariantNode(ContainerNode):
# material.
# \return The node for the preferred material, or None if there is no
# match.
def preferredMaterial(self, approximate_diameter) -> Optional[MaterialNode]:
def preferredMaterial(self, approximate_diameter) -> MaterialNode:
for base_material, material_node in self.materials.items():
if self.machine.preferred_material in base_material and approximate_diameter == int(material_node.getMetaDataEntry("approximate_diameter")):
return material_node
return None
return next(iter(self.materials.values()))
## When a material gets added to the set of profiles, we need to update our
# tree here.