Added attachments method to assist automation.

git-svn-id: https://svn.thoughtbot.com/plugins/paperclip/trunk@211 7bbfaf0e-4d1d-0410-9690-a8bb5f8ef2aa

lib/paperclip.rb

@@ -164,11 +164,9 @@ module Thoughtbot #:nodoc:
       def has_attached_file *attachment_names
         options = attachment_names.last.is_a?(Hash) ? attachment_names.pop : {}
         options = DEFAULT_ATTACHMENT_OPTIONS.merge(options)
-        @attachment_names ||= []
-        @attachment_names += attachment_names
 
         include InstanceMethods
-        attachments ||= {}
+        attachments = (@attachments ||= {})
 
         attachment_names.each do |attr|
           attachments[attr] = (attachments[attr] || {:name => attr}).merge(options)
@@ -272,8 +270,12 @@ module Thoughtbot #:nodoc:
         end
       end
       
-      def attachments
-        @attachment_names
+      def attachment_names
+        @attachments.keys
+      end
+      
+      def attachment name
+        @attachments[name]
       end
       
       # Adds errors if the attachments you specify are either missing or had errors on them.

tasks/paperclip_tasks.rake

+def obtain_class
+  class_name = ENV['CLASS'] || ENV['class']
+  @klass = eval(class_name)
+end
+
+def obtain_attachments
+  name = ENV['ATTACHMENT'] || ENV['attachment']
+  if name.blank? || @klass.attachment_names.include?(name)
+    [ name ]
+  else
+    @klass.attachment_names
+  end
+end
+
 namespace :paperclip do
-  # desc "Regenerates thumbnails for a given CLASS (and optional ATTACHMENT)"
-  # task :refresh do
+  desc "Regenerates thumbnails for a given CLASS (and optional ATTACHMENT)"
+  task :refresh do
+    klass     = obtain_class
+    instances = klass.find(:all)
+    names     = obtain_attachments
+    
+    puts "Regenerating thumbnails for #{instances.length} instances:"
+    instances.each do |instance|
+      names.each do |names|
+        instance.send("process_#{name}_thumbnails")
+      end
+      print instance.save ? "." : "x"; $stdout.flush
+    end
+    puts " Done."
+  end
+  
+  # desc "Cleans out unused attachments for the given CLASS (and optional ATTACHMENT)"
+  # task :clean do
   #   klass     = obtain_class
-  #   attachment = ENV['ATTACHMENT']
-  #   attachments = attachment.blank? ? klass.attachments : [attachment]
   #   instances = klass.find(:all)
-  #   puts "Regenerating thumbnails for #{instances.length} instances:"
-  #   instances.each do |instance|
-  #     attachments.each do |attach|
-  #       instance.send("process_#{attach}_thumbnails")
+  #   names     = obtain_attachments
+  #   
+  #   puts "Finding thumbnails for #{instances.length} instances:"
+  #   files = instances.map do |instance|
+  #     names.map do |name|
+  #       styles = instance.attachment(name)[:thumbnails].keys
+  #       styles << :original
+  #       styles.map do |style|
+  #         instance.send("#{name}_file_name", style)
   #       end
-  #     print instance.save ? "." : "x"; $stdout.flush
   #     end
   #   end
-  
-  # desc "Cleans out unused attachments for the given CLASS (and optional ATTACHMENT)"
-  # task :clean do
+  #   
+  #   pp files
   # end
 end
\ No newline at end of file

test/paperclip_images_test.rb

@@ -13,7 +13,7 @@ class PaperclipImagesTest < Test::Unit::TestCase
   end
   
   def test_should_supply_all_attachment_names
-    assert_equal %w( image ), Foo.attachments.map{|a| a.to_s }.sort
+    assert_equal %w( image ), Foo.attachment_names.map{|a| a.to_s }.sort
   end
 
   def test_should_validate_before_save

test/paperclip_non_standard_test.rb

@@ -13,7 +13,7 @@ class PaperclipNonStandardTest < Test::Unit::TestCase
   end
   
   def test_should_supply_all_attachment_names
-    assert_equal %w( avatar resume ), NonStandard.attachments.map{|a| a.to_s }.sort
+    assert_equal %w( avatar resume ), NonStandard.attachment_names.map{|a| a.to_s }.sort
   end
 
   def test_should_validate_before_save

test/paperclip_test.rb

@@ -11,7 +11,7 @@ class PaperclipTest < Test::Unit::TestCase
   end
   
   def test_should_supply_all_attachment_names
-    assert_equal %w( document ), Bar.attachments.map{|a| a.to_s }.sort
+    assert_equal %w( document ), Bar.attachment_names.map{|a| a.to_s }.sort
   end
 
   def test_should_validate_before_save