when dunning campaign is applied to organization on creation ...

previous dunning campaign applied to organzation is "un-applied"

app/services/dunning_campaigns/create_service.rb

@@ -14,6 +14,13 @@ def call
       # TODO: At least one threshold currency/amount pair is needed
 
       ActiveRecord::Base.transaction do
+        if params[:applied_to_organization]
+          organization
+            .dunning_campaigns
+            .applied_to_organization
+            .update_all(applied_to_organization: false) # rubocop:disable Rails/SkipsModelValidations
+        end
+
         dunning_campaign = organization.dunning_campaigns.create!(
           applied_to_organization: params[:applied_to_organization],
           code: params[:code],
@@ -24,8 +31,6 @@ def call
           thresholds_attributes: params[:thresholds].map(&:to_h)
         )
 
-        # TODO: If the dunning campaign is applied to the organization, we need to remove the flag from all other dunning campaigns.
-
         result.dunning_campaign = dunning_campaign
       end
 

spec/services/dunning_campaigns/create_service_spec.rb

@@ -13,11 +13,13 @@
       days_between_attempts: 1,
       max_attempts: 3,
       description: "Dunning Campaign Description",
-      applied_to_organization: true,
+      applied_to_organization:,
       thresholds:
     }
   end
 
+  let(:applied_to_organization) { false }
+
   let(:thresholds) do
     [
       {amount_cents: 10000, currency: "USD"},
@@ -67,6 +69,45 @@
           expect(result.dunning_campaign.thresholds.first).to be_a(DunningCampaignThreshold)
         end
 
+        context "with a previous dunning campaign set as applied_to_organization" do
+          let(:dunning_campaign_2) do
+            create(:dunning_campaign, organization:, applied_to_organization: true)
+          end
+
+          before { dunning_campaign_2 }
+
+          it "does not change previous dunning campaign applied_to_organization" do
+            expect { create_service.call }
+              .not_to change(dunning_campaign_2.reload, :applied_to_organization)
+          end
+        end
+
+        context "with applied_to_organization true" do
+          let(:applied_to_organization) { true }
+
+          it "updates the dunning campaign" do
+            result = create_service.call
+
+            expect(result).to be_success
+            expect(result.dunning_campaign.applied_to_organization).to eq(true)
+          end
+
+          context "with a previous dunning campaign set as applied_to_organization" do
+            let(:dunning_campaign_2) do
+              create(:dunning_campaign, organization:, applied_to_organization: true)
+            end
+
+            before { dunning_campaign_2 }
+
+            it "removes applied_to_organization from previous dunning campaign" do
+              expect { create_service.call }
+                .to change { dunning_campaign_2.reload.applied_to_organization }
+                .from(true)
+                .to(false)
+            end
+          end
+        end
+
         context "with validation error" do
           before do
             create(:dunning_campaign, organization:, code: "dunning-campaign")