Convert promotion actions to discard

backend/app/controllers/spree/admin/promotion_actions_controller.rb

@@ -17,7 +17,7 @@ def create
 
   def destroy
     @promotion_action = @promotion.promotion_actions.find(params[:id])
-    if @promotion_action.destroy
+    if @promotion_action.discard
       flash[:success] = t('spree.successfully_removed', resource: t('spree.promotion_action'))
     end
     respond_to do |format|

core/app/models/spree/promotion/actions/create_adjustment.rb

@@ -11,6 +11,7 @@ class CreateAdjustment < PromotionAction
 
         before_validation :ensure_action_has_calculator
         before_destroy :remove_adjustments_from_incomplete_orders
+        before_discard :remove_adjustments_from_incomplete_orders
 
         # Creates the adjustment related to a promotion for the order passed
         # through options hash

core/app/models/spree/promotion/actions/create_item_adjustments.rb

@@ -11,6 +11,7 @@ class CreateItemAdjustments < PromotionAction
 
         before_validation :ensure_action_has_calculator
         before_destroy :remove_adjustments_from_incomplete_orders
+        before_discard :remove_adjustments_from_incomplete_orders
 
         def perform(payload = {})
           order = payload[:order]

core/app/models/spree/promotion_action.rb

@@ -1,10 +1,16 @@
+require 'discard'
+
 module Spree
   # Base class for all types of promotion action.
   #
   # PromotionActions perform the necessary tasks when a promotion is activated
   # by an event and determined to be eligible.
   class PromotionAction < Spree::Base
     acts_as_paranoid
+    include Spree::ParanoiaDeprecations
+
+    include Discard::Model
+    self.discard_column = :deleted_at
 
     belongs_to :promotion, class_name: 'Spree::Promotion', inverse_of: :promotion_actions
 

core/spec/models/spree/promotion/actions/create_adjustment_spec.rb

@@ -78,7 +78,7 @@
     end
   end
 
-  context "#paranoia_destroy" do
+  shared_examples "destroying adjustments from incomplete orders" do
     before(:each) do
       action.calculator = Spree::Calculator::FlatRate.new(preferred_amount: 10)
       promotion.promotion_actions = [action]
@@ -87,7 +87,7 @@
     context "when order is not complete" do
       it "should not keep the adjustment" do
         action.perform(payload)
-        action.paranoia_destroy
+        subject
         expect(order.adjustments.count).to eq(0)
       end
     end
@@ -99,7 +99,7 @@
 
       before(:each) do
         action.perform(payload)
-        action.paranoia_destroy
+        subject
       end
 
       it "should keep the adjustment" do
@@ -111,4 +111,14 @@
       end
     end
   end
+
+  context "#discard" do
+    subject { action.discard }
+    it_should_behave_like "destroying adjustments from incomplete orders"
+  end
+
+  context "#paranoia_destroy" do
+    subject { Spree::Deprecation.silence { action.paranoia_destroy } }
+    it_should_behave_like "destroying adjustments from incomplete orders"
+  end
 end

core/spec/models/spree/promotion/actions/create_item_adjustments_spec.rb

@@ -138,7 +138,7 @@ module Spree
       end
     end
 
-    context "#paranoia_destroy" do
+    shared_examples "destroying adjustments from incomplete orders" do
       let!(:action) { promotion.actions.first }
       let(:other_action) { other_promotion.actions.first }
       let(:promotion) { create(:promotion, :with_line_item_adjustment) }
@@ -151,7 +151,7 @@ module Spree
           order.adjustments.create!(label: 'Check', amount: 0, order: order, source: action)
 
           expect {
-            action.paranoia_destroy
+            subject
           }.to change { Adjustment.count }.by(-1)
         end
       end
@@ -165,7 +165,7 @@ module Spree
 
           expect {
             expect {
-              action.paranoia_destroy
+              subject
             }.not_to change { adjustment.reload.source_id }
           }.not_to change { Spree::Adjustment.count }
 
@@ -177,10 +177,20 @@ module Spree
           order.adjustments.create!(label: "Check", amount: 0, order: order, source: action)
 
           expect {
-            action.paranoia_destroy
+            subject
           }.not_to change { other_action.adjustments.count }
         end
       end
     end
+
+    describe "#discard" do
+      subject { action.discard }
+      it_should_behave_like "destroying adjustments from incomplete orders"
+    end
+
+    describe "#paranoia_destroy" do
+      subject { Spree::Deprecation.silence { action.paranoia_destroy } }
+      it_should_behave_like "destroying adjustments from incomplete orders"
+    end
   end
 end

frontend/spec/features/coupon_code_spec.rb

@@ -174,13 +174,12 @@ def create_basic_coupon_promotion(code)
           calculator = Spree::Calculator::FlatPercentItemTotal.new
           calculator.preferred_flat_percent = 100
 
-          action = Spree::Promotion::Actions::CreateAdjustment.new
-          action.calculator = calculator
-          action.promotion = promotion
-          action.save!
+          promotion.promotion_actions.first.discard
 
-          promotion.promotion_actions = [action]
-          promotion.save!
+          Spree::Promotion::Actions::CreateAdjustment.create!(
+            calculator: calculator,
+            promotion: promotion
+          )
 
           create(:product, name: "Spree Mug", price: 10)
         end