Cleanup the duplicated fields on subscription creation

lib/solidus_subscriptions/subscription_generator.rb

@@ -34,6 +34,8 @@ def activate(subscription_line_items)
 
       Subscription.create!(subscription_attributes) do |sub|
         sub.actionable_date = sub.next_actionable_date
+      end.tap do |_subscription|
+        cleanup_subscription_line_items(subscription_line_items)
       end
     end
 
@@ -54,6 +56,15 @@ def group(subscription_line_items)
 
     private
 
+    def cleanup_subscription_line_items(subscription_line_items)
+      ids = subscription_line_items.pluck :id
+      SolidusSubscriptions::LineItem.where(id: ids).update_all(
+        interval_length: nil,
+        interval_units: nil,
+        end_date: nil
+      )
+    end
+
     def subscription_configuration(subscription_line_item)
       SubscriptionConfiguration.new(
         subscription_line_item.interval_length,

spec/lib/solidus_subscriptions/subscription_generator_spec.rb

@@ -44,6 +44,15 @@
         payment_source: payment_source,
       )
     end
+
+    it 'cleanups the subscription line items fields duplicated on the subscription' do
+      subscription_line_item = create(:subscription_line_item)
+
+      described_class.activate([subscription_line_item])
+
+      attrs = %i[interval_length interval_units end_date]
+      expect(subscription_line_item.reload.slice(attrs).values).to eq [nil, nil, nil]
+    end
   end
 
   describe '.group' do