Added methods to check an assets MIME type to avoid post processing

Author: MKwenhua

app/cells/plugins/core/asset_info/index.haml

@@ -1,2 +1,2 @@
 - if asset
-  = image_tag(asset['style_urls'][config[:thumbnail_style]], height: '50px')
+  = image_tag(asset_thumb(asset), height: '50px')

app/cells/plugins/core/asset_info_cell.rb

@@ -20,6 +20,10 @@ def config
         @options[:config] || {}
       end
 
+      def asset_thumb(asset)
+        asset['style_urls'] ? asset['style_urls'][config[:thumbnail_style]] : 'https://secure.gravatar.com/avatar/f995c9cc06a8282138cf6c0691396f6d'
+      end
+
       def asset
         data['asset']
       end

app/models/asset_field_type.rb

@@ -16,7 +16,7 @@ class AssetFieldType < FieldType
   validate :validate_asset_content_type, if: :validate_content_type?
 
   def metadata=(metadata_hash)
-    @metadata = metadata_hash.deep_symbolize_keys
+    @metadata = format_data(metadata_hash).deep_symbolize_keys
     @existing_data = metadata_hash[:existing_data]
     Paperclip::HasAttachedFile.define_on(self.class, :asset, existing_metadata)
   end
@@ -52,6 +52,15 @@ def mapping
 
   private
 
+  def is_image(mime_type)
+    ["image/jpeg", "image/pjpeg", "image/png","application/pdf" ,"image/x-png", "image/gif"].include?(mime_type)
+  end
+
+  def format_data(metadata_hash)
+   return metadata_hash if is_image(metadata_hash[:content_type])
+   metadata_hash.reject{|k| k == "processors"}
+  end
+
   def image?
     asset_content_type =~ %r{^(image|(x-)?application)/(bmp|gif|jpeg|jpg|pjpeg|png|x-png)$}
   end