Added _identifier to retrieve identifier/filename

lib/carrierwave/mount.rb

@@ -65,7 +65,7 @@ def uploader_option(column, option)
     #     @user.image.url # => '/some_url.png'
     #
     # It is also possible (but not recommended) to ommit the uploader, which
-    # will create an anonymous uploader class. 
+    # will create an anonymous uploader class.
     #
     # Passing a block makes it possible to customize the uploader. This can be
     # convenient for brevity, but if there is any significatnt logic in the
@@ -98,6 +98,7 @@ def uploader_option(column, option)
     # [image_processing_error]  Returns an error object if the last file to be assigned caused a processing error
     #
     # [write_image_identifier]  Uses the write_uploader method to set the identifier.
+    # [image_identifier]        Reads out the identifier of the file
     #
     # === Parameters
     #
@@ -230,6 +231,10 @@ def write_#{column}_identifier
           _mounter(:#{column}).write_identifier
         end
 
+        def #{column}_identifier
+          _mounter(:#{column}).identifier
+        end
+
       RUBY
 
     end

spec/mount_spec.rb

@@ -448,6 +448,13 @@ def monkey
       end
     end
 
+    describe '#image_identifier' do
+      it "should return the identifier from the mounted column" do
+        @instance.should_receive(:read_uploader).with(:image).and_return("test.jpg")
+        @instance.image_identifier.should == 'test.jpg'
+      end
+    end
+
   end
 
   describe '#mount_uploader without an uploader' do

spec/orm/activerecord_spec.rb

@@ -199,6 +199,7 @@ def monkey
         @event.save.should be_true
         @event.reload
         @event[:image].should == 'test.jpeg'
+        @event.image_identifier.should == 'test.jpeg'
       end
 
       it "should preserve the image when nothing is assigned" do
@@ -208,6 +209,7 @@ def monkey
         @event.foo = "bar"
         @event.save.should be_true
         @event[:image].should == 'test.jpeg'
+        @event.image_identifier.should == 'test.jpeg'
       end
 
       it "should remove the image if remove_image? returns true" do
@@ -218,6 +220,7 @@ def monkey
         @event.reload
         @event.image.should be_blank
         @event[:image].should == ''
+        @event.image_identifier.should == ''
       end
 
       it "should mark image as changed when saving a new image" do
@@ -319,7 +322,6 @@ def filename
       end
 
     end
-
   end
 
   describe '#mount_uploader with :mount_on => :monkey' do