document conditions

lib/submissions/generate_preview_attachments.rb

@@ -37,9 +37,11 @@ module Submissions
       original_documents = template.documents.preload(:blob)
 
       result_attachments =
-        (submission.template_schema || template.schema).map do |item|
+        (submission.template_schema || template.schema).filter_map do |item|
           pdf = pdfs_index[item['attachment_uuid']]
 
+          next if pdf.nil?
+
           if original_documents.find { |a| a.uuid == item['attachment_uuid'] }.image?
             pdf = GenerateResultAttachments.normalize_image_pdf(pdf)