Page form with drop down. Modifications for Designs

app/uploaders/asset_uploader.rb

@@ -1,6 +1,14 @@
 # encoding: utf-8
 
 class AssetUploader < CarrierWave::Uploader::Base
+  require 'mime/types'
+  
+  process :set_content_type
+
+  def set_content_type(*args)
+    content_type = file.content_type == 'binary/octet-stream' || 'application/octet-stream' || file.content_type.blank? ? MIME::Types.type_for(original_filename).first.to_s : file.content_type
+    self.file.instance_variable_set(:@content_type, content_type)
+  end
 
   # Include RMagick or ImageScience support:
   # include CarrierWave::RMagick