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@@ -0,0 +1 @@
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+test/debug.log

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@@ -116,41 +116,47 @@ module Technoweenie # :nodoc:
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         content_types.include?(content_type)
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       end
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-      # Callback after an image has been resized.
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-      #
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-      #   class Foo < ActiveRecord::Base
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-      #     acts_as_attachment
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-      #     after_resize do |record, img| 
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-      #       record.aspect_ratio = img.columns.to_f / img.rows.to_f
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-      #     end
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-      #   end
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-      def after_resize(&block)
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-        write_inheritable_array(:after_resize, [block])
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-      end
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+      if defined?(::ActiveSupport::Callbacks)
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+        def self.extended(base)
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+          base.define_callbacks :after_resize, :after_attachment_saved, :before_thumbnail_saved
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+        end
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+      else
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+        # Callback after an image has been resized.
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+        #
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+        #   class Foo < ActiveRecord::Base
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+        #     acts_as_attachment
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+        #     after_resize do |record, img| 
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+        #       record.aspect_ratio = img.columns.to_f / img.rows.to_f
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+        #     end
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+        #   end
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+        def after_resize(&block)
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+          write_inheritable_array(:after_resize, [block])
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+        end
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-      # Callback after an attachment has been saved either to the file system or the DB.
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-      # Only called if the file has been changed, not necessarily if the record is updated.
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-      #
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-      #   class Foo < ActiveRecord::Base
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-      #     acts_as_attachment
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-      #     after_attachment_saved do |record|
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-      #       ...
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-      #     end
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-      #   end
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-      def after_attachment_saved(&block)
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-        write_inheritable_array(:after_attachment_saved, [block])
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-      end
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+        # Callback after an attachment has been saved either to the file system or the DB.
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+        # Only called if the file has been changed, not necessarily if the record is updated.
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+        #
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+        #   class Foo < ActiveRecord::Base
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+        #     acts_as_attachment
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+        #     after_attachment_saved do |record|
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+        #       ...
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+        #     end
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+        #   end
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+        def after_attachment_saved(&block)
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+          write_inheritable_array(:after_attachment_saved, [block])
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+        end
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-      # Callback before a thumbnail is saved.  Use this to pass any necessary extra attributes that may be required.
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-      #
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-      #   class Foo < ActiveRecord::Base
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-      #     acts_as_attachment
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-      #     before_thumbnail_saved do |record, thumbnail|
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-      #       ...
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-      #     end
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-      #   end
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-      def before_thumbnail_saved(&block)
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-        write_inheritable_array(:before_thumbnail_saved, [block])
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+        # Callback before a thumbnail is saved.  Use this to pass any necessary extra attributes that may be required.
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+        #
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+        #   class Foo < ActiveRecord::Base
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+        #     acts_as_attachment
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+        #     before_thumbnail_saved do |record, thumbnail|
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+        #       ...
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+        #     end
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+        #   end
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+        def before_thumbnail_saved(&block)
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+          write_inheritable_array(:before_thumbnail_saved, [block])
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+        end
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       end
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       # Get the thumbnail class, which is the current attachment class by default.
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@@ -397,10 +403,30 @@ module Technoweenie # :nodoc:
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             result = callback.call(self, arg)
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             return false if result == false
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           end
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+          result
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+        end
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-          return result
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+        # Rather ugly monkey-patch of AS::Callbacks to support taking an arg
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+        if defined?(::ActiveSupport::Callbacks)
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+          def callbacks_for(method) #:nodoc: compatibility method
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+            self.class.send("#{method}_callback_chain")
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+          end
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+          class ::ActiveSupport::Callbacks::Callback
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+            # Make callbacks accept arguments, but only pass them along to procs for now
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+            def call(object, *args)
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+              if should_run_callback?(object)
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+                case method
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+                when Proc
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+                  args = [object, *args].compact
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+                  method.call(*args)
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+                else
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+                  evaluate_method(method, object)
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+                end
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+              end
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+            end
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+          end
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         end
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-        
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+
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         # Removes the thumbnails for the attachment, if it has any
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         def destroy_thumbnails
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           self.thumbnails.each { |thumbnail| thumbnail.destroy } if thumbnailable?

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@@ -162,7 +162,7 @@ class RmagickTest < Test::Unit::TestCase
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       assert_equal 'rails_thumb.png', attachment.thumbnails.first.filename
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       assert_equal attachment.thumbnails.first.full_filename, attachment.full_filename(attachment.thumbnails.first.thumbnail),
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         "#full_filename does not use thumbnail class' path."
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-      assert_equal attachment.destroy attachment
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+      assert_equal attachment.destroy, attachment
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     end
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     test_against_subclass :test_should_use_thumbnail_subclass, ImageWithThumbsClassFileAttachment