includes last_pipeline

lib/api/entities.rb

@@ -690,9 +690,7 @@ module API
       expose :id
       expose :description, :ref, :cron, :cron_timezone, :next_run_at, :active
       expose :created_at, :updated_at, :deleted_at
-      expose :last_pipeline, using: Entities::Pipeline do |pipeline_schedule|
-        pipeline_schedule.pipelines&.last
-      end
+      expose :last_pipeline, using: Entities::Pipeline
       expose :owner, using: Entities::UserBasic
     end

lib/api/pipeline_schedules.rb

@@ -17,7 +17,7 @@ module API
       get ':id/pipeline_schedules' do
         authorize! :read_pipeline_schedule, user_project
-        pipeline_schedules = user_project.pipeline_schedules.preload(:pipelines)
+        pipeline_schedules = user_project.pipeline_schedules.includes(last_pipeline: {statuses: :latest})
         present paginate(pipeline_schedules), with: Entities::PipelineSchedule
       end

spec/requests/api/pipeline_schedules_spec.rb

@@ -31,6 +31,9 @@ describe API::PipelineSchedules do
         end.count
         create_list(:ci_pipeline_schedule, 10, project: project, owner: developer)
+          .each do |pipeline_schedule|
+          pipeline_schedule.pipelines << build(:ci_pipeline, project: project)
+        end
         expect do
           get api("/projects/#{project.id}/pipeline_schedules", developer)