Added logging to paperclip.rb and attachment.rb

lib/paperclip/attachment.rb

@@ -43,6 +43,8 @@ module Paperclip
 
       normalize_style_definition
       initialize_storage
+
+      logger.info("[paperclip] Paperclip attachment #{name} on #{instance.class} initialized.")
     end
 
     # What gets called when you call instance.attachment = File. It clears errors,
@@ -50,6 +52,7 @@ module Paperclip
     # the previous file for deletion, to be flushed away on #save of its host.
     def assign uploaded_file
       return nil unless valid_assignment?(uploaded_file)
+      logger.info("[paperclip] Assigning #{uploaded_file} to #{name}")
 
       queue_existing_for_delete
       @errors            = []
@@ -57,6 +60,7 @@ module Paperclip
 
       return nil if uploaded_file.nil?
 
+      logger.info("[paperclip] Writing attributes for #{name}")
       @queued_for_write[:original]        = uploaded_file.to_tempfile
       @instance[:"#{@name}_file_name"]    = uploaded_file.original_filename.strip.gsub /[^\w\d\.\-]+/, '_'
       @instance[:"#{@name}_content_type"] = uploaded_file.content_type.strip
@@ -111,11 +115,13 @@ module Paperclip
     # the instance's errors and returns false, cancelling the save.
     def save
       if valid?
+        logger.info("[paperclip] Saving files for #{name}")
         flush_deletes
         flush_writes
         @dirty = false
         true
       else
+        logger.info("[paperclip] Errors on #{name}. Not saving.")
         flush_errors
         false
       end
@@ -173,6 +179,10 @@ module Paperclip
 
     private
 
+    def logger
+      instance.logger
+    end
+
     def valid_assignment? file #:nodoc:
       file.nil? || (file.respond_to?(:original_filename) && file.respond_to?(:content_type))
     end
@@ -202,6 +212,7 @@ module Paperclip
 
     def post_process #:nodoc:
       return if @queued_for_write[:original].nil?
+      logger.info("[paperclip] Post-processing #{name}")
       @styles.each do |name, args|
         begin
           dimensions, format = args
@@ -228,6 +239,7 @@ module Paperclip
 
     def queue_existing_for_delete #:nodoc:
       return if original_filename.blank?
+      logger.info("[paperclip] Queueing the existing files for #{name} for deletion.")
       @queued_for_delete += [:original, *@styles.keys].uniq.map do |style|
         path(style) if exists?(style)
       end.compact

lib/paperclip/storage.rb

@@ -36,8 +36,10 @@ module Paperclip
       alias_method :to_io, :to_file
 
       def flush_writes #:nodoc:
+        logger.info("[paperclip] Writing files for #{name}")
         @queued_for_write.each do |style, file|
           FileUtils.mkdir_p(File.dirname(path(style)))
+          logger.info("[paperclip] -> #{path(style)}")
           result = file.stream_to(path(style))
           file.close
           result.close
@@ -46,8 +48,10 @@ module Paperclip
       end
 
       def flush_deletes #:nodoc:
+        logger.info("[paperclip] Deleting files for #{name}")
         @queued_for_delete.each do |path|
           begin
+            logger.info("[paperclip] -> #{path}")
             FileUtils.rm(path) if File.exist?(path)
           rescue Errno::ENOENT => e
             # ignore file-not-found, let everything else pass
@@ -102,6 +106,7 @@ module Paperclip
         base.class.interpolations[:s3_url] = lambda do |attachment, style|
           "https://s3.amazonaws.com/#{attachment.bucket_name}/#{attachment.path(style).gsub(%r{^/}, "")}"
         end
+        ActiveRecord::Base.logger.info("[paperclip] S3 Storage Initalized.")
       end
 
       def s3
@@ -135,8 +140,10 @@ module Paperclip
       alias_method :to_io, :to_file
 
       def flush_writes #:nodoc:
+        logger.info("[paperclip] Writing files for #{name}")
         @queued_for_write.each do |style, file|
           begin
+            logger.info("[paperclip] -> #{path(style)}")
             key = s3_bucket.key(path(style))
             key.data = file
             key.put(nil, @s3_permissions)
@@ -148,8 +155,10 @@ module Paperclip
       end
 
       def flush_deletes #:nodoc:
+        logger.info("[paperclip] Writing files for #{name}")
         @queued_for_delete.each do |path|
           begin
+            logger.info("[paperclip] -> #{path(style)}")
             if file = s3_bucket.key(path)
               file.delete
             end

test/attachment_test.rb

@@ -154,6 +154,7 @@ class AttachmentTest < Test::Unit::TestCase
       @instance.stubs(:[]).with(:test_file_name).returns(nil)
       @instance.stubs(:[]).with(:test_content_type).returns(nil)
       @instance.stubs(:[]).with(:test_file_size).returns(nil)
+      @instance.stubs(:logger).returns(ActiveRecord::Base.logger)
       @attachment = Paperclip::Attachment.new(:test,
                                               @instance)
       @file = File.new(File.join(File.dirname(__FILE__),