Update and reduce queries

app/models/alert_management/alert.rb

@@ -145,8 +145,8 @@ module AlertManagement
     end
 
     def self.last_prometheus_alert_by_project_id
-      ids = select(arel_table[:id].maximum.as('id')).group(:project_id).map(&:id)
-      with_prometheus_alert.find(ids)
+      ids = select(arel_table[:id].maximum).group(:project_id)
+      with_prometheus_alert.where(id: ids)
     end
 
     def details

ee/spec/services/dashboard/operations/list_service_spec.rb

@@ -41,7 +41,7 @@ RSpec.describe Dashboard::Operations::ListService do
       it 'ensures a fixed amount of queries' do
         queries = ActiveRecord::QueryRecorder.new { subject }.count
 
-        expect(queries).to eq(8)
+        expect(queries).to eq(7)
       end
     end