Merge pull request #13027 from chahmedejaz/bugfix/13026-reset-variant-unit-name

Changing a variant unit scale from items to weight/volume does not remove variant unit name

app/services/variant_units/variant_and_line_item_naming.rb

@@ -65,6 +65,7 @@ module VariantUnits
     def unit_value_attributes
       units = { unit_presentation: option_value_name }
       units.merge!(variant_unit:) if has_attribute?(:variant_unit)
+      units.merge!(variant_unit_name: '') if reset_variant_unit_name?
       units
     end
 
@@ -79,5 +80,9 @@ module VariantUnits
 
       VariantUnits::OptionValueNamer.new(self).name
     end
+
+    def reset_variant_unit_name?
+      has_attribute?(:variant_unit_name) && has_attribute?(:variant_unit) && variant_unit != 'items'
+    end
   end
 end

spec/models/spree/variant_spec.rb

@@ -987,11 +987,11 @@ RSpec.describe Spree::Variant do
 
       variant.variant_unit = 'weight'
       variant.variant_unit_scale = 1
-      variant.variant_unit_name = 'g'
       variant.save!
 
       expect(variant.variant_unit).to eq 'weight'
       expect(variant.unit_presentation).to eq "1g"
+      expect(variant.variant_unit_name).to eq('')
 
       variant.update(variant_unit: 'volume')