Ensure adjustments can access soft-deleted originators

Note: originator is generally an EnterpriseFee or a TaxRate

app/models/spree/adjustment.rb

@@ -162,6 +162,13 @@ module Spree
       result
     end
 
+    # Allow accessing soft-deleted originator objects
+    def originator
+      return if originator_type.blank?
+
+      originator_type.constantize.unscoped { super }
+    end
+
     private
 
     def update_adjustable

spec/models/enterprise_fee_spec.rb

@@ -139,4 +139,24 @@ describe EnterpriseFee do
       end.to change(order.adjustments, :count).by(0)
     end
   end
+
+  describe "soft-deletion" do
+    let(:tax_category) { create(:tax_category) }
+    let(:enterprise_fee) { create(:enterprise_fee, tax_category: tax_category ) }
+    let!(:adjustment) { create(:adjustment, originator: enterprise_fee) }
+
+    before do
+      enterprise_fee.destroy
+      enterprise_fee.reload
+    end
+
+    it "soft-deletes the enterprise fee" do
+      expect(enterprise_fee.deleted_at).to_not be_nil
+    end
+
+    it "can be accessed by old adjustments" do
+      expect(adjustment.reload.originator).to eq enterprise_fee
+      expect(adjustment.originator.tax_category).to eq enterprise_fee.tax_category
+    end
+  end
 end