removed useless binding in applicative sanity check

fixes #549

app/controllers/rails_admin/main_controller.rb

@@ -276,7 +276,7 @@ def back_or_index
 
     def get_sort_hash(model_config)
       abstract_model = model_config.abstract_model
-      params[:sort] = params[:sort_reverse] = nil unless model_config.list.with(:view => self, :object => abstract_model.model.new).visible_fields.map {|f| f.name.to_s}.include? params[:sort]
+      params[:sort] = params[:sort_reverse] = nil unless model_config.list.fields.map {|f| f.name.to_s}.include? params[:sort]
 
       params[:sort] ||= model_config.list.sort_by.to_s
       params[:sort_reverse] ||= 'false'

spec/requests/rails_admin_spec.rb

@@ -59,6 +59,31 @@
       should_not have_selector("#player_name[type=hidden][value='toto@example.com']")
     end
   end
+
+  describe '_current_user should be accessible from the list view' do # https://github.com/sferik/rails_admin/issues/549
+
+    it 'should work' do
+      RailsAdmin.config Player do
+        list do
+          field :name do
+            visible do
+              bindings[:view]._current_user.email == 'username@example.com'
+            end
+          end
+
+          field :team do
+            visible do
+              bindings[:view]._current_user.email == 'foo@example.com'
+            end
+          end
+        end
+      end
+
+      visit index_path(:model_name => "player")
+      should have_selector(".header.name_field")
+      should_not have_selector(".header.team_field")
+    end
+  end
 
   describe "polymorphic associations" do
     before :each do