1 files changed, 9 insertions, 8 deletions
diff --git a/app/serializers/pipeline_serializer.rb b/app/serializers/pipeline_serializer.rb
index 7181f8a6b04..17a022539bb 100644
--- a/app/serializers/pipeline_serializer.rb
+++ b/app/serializers/pipeline_serializer.rb
@@ -1,14 +1,11 @@
 class PipelineSerializer < BaseSerializer
   include WithPagination
-
-  InvalidResourceError = Class.new(StandardError)
-
   entity PipelineDetailsEntity
 
   def represent(resource, opts = {})
     if resource.is_a?(ActiveRecord::Relation)
-
       resource = resource.preload([
+        :stages,
         :retryable_builds,
         :cancelable_statuses,
         :trigger_requests,
@@ -20,10 +17,14 @@ class PipelineSerializer < BaseSerializer
     end
 
     if paginated?
-      super(@paginator.paginate(resource), opts)
-    else
-      super(resource, opts)
+      resource = paginator.paginate(resource)
     end
+
+    if opts.delete(:preload)
+      resource = Gitlab::Ci::Pipeline::Preloader.preload!(resource)
+    end
+
+    super(resource, opts)
   end
 
   def represent_status(resource)
@@ -36,7 +37,7 @@ class PipelineSerializer < BaseSerializer
   def represent_stages(resource)
     return {} unless resource.present?
 
-    data = represent(resource, { only: [{ details: [:stages] }] })
+    data = represent(resource, { only: [{ details: [:stages] }], preload: true })
     data.dig(:details, :stages) || []
   end
 end