Correctly set style when interpolating :hash

lib/paperclip/attachment.rb

@@ -212,10 +212,10 @@ module Paperclip
 
     # Returns a unique hash suitable for obfuscating the URL of an otherwise
     # publicly viewable attachment.
-    def hash
+    def hash(style_name = default_style)
       raise ArgumentError, "Unable to generate hash without :hash_secret" unless @hash_secret
       require 'openssl' unless defined?(OpenSSL)
-      data = interpolate(@hash_data)
+      data = interpolate(@hash_data, style_name)
       OpenSSL::HMAC.hexdigest(OpenSSL::Digest.const_get(@hash_digest).new, @hash_secret, data)
     end
 

lib/paperclip/interpolations.rb

@@ -107,7 +107,7 @@ module Paperclip
     # Returns a the attachment hash.  See Paperclip::Attachment#hash for
     # more details.
     def hash attachment, style_name
-      attachment.hash
+      attachment.hash(style_name)
     end
 
     # Returns the id of the instance in a split path form. e.g. returns

test/attachment_test.rb

@@ -155,7 +155,7 @@ class AttachmentTest < Test::Unit::TestCase
       end
 
       should "interpolate the hash data" do
-        @attachment.expects(:interpolate).with(@attachment.options[:hash_data]).returns("interpolated_stuff")
+        @attachment.expects(:interpolate).with(@attachment.options[:hash_data],anything).returns("interpolated_stuff")
         @attachment.hash
       end
 
@@ -166,6 +166,11 @@ class AttachmentTest < Test::Unit::TestCase
       should "result in a correct hash" do
         assert_equal "d22b617d1bf10016aa7d046d16427ae203f39fce", @attachment.path
       end
+
+      should "generate a hash digest with the correct style" do
+        OpenSSL::HMAC.expects(:hexdigest).with(anything, anything, "fake_models/avatars/1234/medium/1234567890")
+        @attachment.path("medium")
+      end
     end
   end