fix #289. This fix is different from the one in the master branch. It only the filename (without the whole path and the extension)

app/models/locomotive/content_entry.rb

@@ -39,11 +39,13 @@ module Locomotive
     alias :_permalink= :_slug=
 
     def _label(type = nil)
-      if self._label_field_name
+      value = if self._label_field_name
         self.send(self._label_field_name.to_sym)
       else
         self.send((type || self.content_type).label_field_name.to_sym)
       end
+
+      value.respond_to?(:to_label) ? value.to_label : value
     end
 
     def next

lib/locomotive/carrierwave/base.rb

@@ -2,6 +2,10 @@ module CarrierWave
   module Uploader
     class Base
 
+      def to_label
+        File.basename(self.to_s, File.extname(self.to_s))
+      end
+
       def to_liquid
         Locomotive::Liquid::Drops::Uploader.new(self)
       end

spec/models/locomotive/content_entry_spec.rb

@@ -10,6 +10,7 @@ describe Locomotive::ContentEntry do
     @content_type.entries_custom_fields.build :label => 'Title', :type => 'string'
     @content_type.entries_custom_fields.build :label => 'Description', :type => 'text'
     @content_type.entries_custom_fields.build :label => 'Visible ?', :type => 'boolean', :name => 'visible'
+    @content_type.entries_custom_fields.build :label => 'File', :type => 'file'
     @content_type.valid?
     @content_type.send(:set_default_values)
   end
@@ -127,6 +128,12 @@ describe Locomotive::ContentEntry do
       @content_entry._permalink.should == 'my-test'
     end
 
+    it 'also accepts a file field as the highlighted field' do
+      @content_entry.stubs(:_label_field_name).returns('file')
+      @content_entry.file = FixturedAsset.open('5k.png'); @content_entry.send(:set_slug)
+      @content_entry._permalink.should == '5k'
+    end
+
   end
 
   describe '#visibility' do