Refactored a bit and removed temp files.

app/jobs/content_generation_job.rb

@@ -1,10 +1,6 @@
 class ContentGenerationJob < ApplicationJob
   require 'docsplit'
 
-  @document_id = nil
-  @document = nil
-  @content = nil
-
   queue_as :default
 
   # after_perform :generate_tags
@@ -40,17 +36,16 @@ class ContentGenerationJob < ApplicationJob
       file_basename = File.basename(@document.doc.path, '.pdf')
       folder_path = 'tmp/raw_content/' + file_basename
       Docsplit.extract_images(@document.doc.path, output: folder_path, size: '200x', format: :png)
-      @content.pagecount.times do |page|
-        i = page + 1
+      1.upto(@content.pagecount) do |page|
+        file_name = folder_path + '/' + File.basename(@document.doc.path, '.pdf') + '_' + page.to_s + '.png'
         page_preview = @content.page_previews.build
-        puts 'build fine'
-        file = File.open(folder_path + '/' + File.basename(@document.doc.path, '.pdf') + '_' + i.to_s + '.png', 'rb')
-        puts 'opened fine'
+        file = File.open(file_name, 'rb')
         page_preview.preview = file
-        page_preview.pagenumber = i
+        page_preview.pagenumber = page
         file.close
         page_preview.save
       end
+      FileUtils.rm_rf(folder_path)
     end
 
     def generate_tags