Using fetch instead of direct refference for hash

app/serializers/build_serializer.rb

@@ -7,6 +7,6 @@ class BuildSerializer < BaseSerializer
 
   def represent_status(resource)
     data = represent(resource, { only: [:status] })
-    data[:status]
+    data.fetch(:status, {})
   end
 end

app/serializers/pipeline_serializer.rb

@@ -25,6 +25,6 @@ class PipelineSerializer < BaseSerializer
 
   def represent_status(resource)
     data = represent(resource, { only: [{ details: [:status] }] })
-    data[:details][:status]
+    data.fetch(:details, {}).fetch(:status, {})
   end
 end