Clean up DastSite on DastSiteProfile destroy

ee/app/models/dast_site_profile.rb

@@ -10,8 +10,14 @@ class DastSiteProfile < ApplicationRecord
 
   scope :with_dast_site, -> { includes(:dast_site) }
 
+  after_destroy :cleanup_dast_site
+
   private
 
+  def cleanup_dast_site
+    dast_site.destroy if dast_site.dast_site_profiles.empty?
+  end
+
   def dast_site_project_id_fk
     unless project_id == dast_site&.project_id
       errors.add(:project_id, 'does not match dast_site.project')

ee/spec/models/dast_site_profile_spec.rb

@@ -43,4 +43,24 @@ RSpec.describe DastSiteProfile, type: :model do
       end
     end
   end
+
+  describe '#destroy!' do
+    context 'when the associated dast_site has no dast_site_profiles' do
+      it 'is also destroyed' do
+        subject.destroy!
+
+        expect { subject.dast_site.reload }.to raise_error(ActiveRecord::RecordNotFound)
+      end
+    end
+
+    context 'when the associated dast_site has dast_site_profiles' do
+      it 'is not destroyed' do
+        create(:dast_site_profile, dast_site: subject.dast_site, project: subject.project)
+
+        subject.destroy!
+
+        expect { subject.dast_site.reload }.not_to raise_error
+      end
+    end
+  end
 end