ignore :base in semantic_errors, since base errors are always rendere…

…d, avoids duplicates (fixes #576)

lib/formtastic/helpers/errors_helper.rb

@@ -40,6 +40,7 @@ module ErrorsHelper
       #   <% end %>
       def semantic_errors(*args)
         html_options = args.extract_options!
+        args = args - [:base]
         full_errors = args.inject([]) do |array, method|
           attribute = localized_string(method, method.to_sym, :label) || humanized_attribute_name(method)
           errors = Array(@object.errors[method.to_sym]).to_sentence

spec/helpers/semantic_errors_helper_spec.rb

@@ -95,4 +95,18 @@
       end
     end
   end
+
+  describe 'when :base is passed in as an argument' do
+    before do
+      @errors.stub!(:[]).with(:base).and_return(@base_error)
+    end
+
+    it 'should ignore :base and only render base errors once' do
+      semantic_form_for(@new_post) do |builder|
+        builder.semantic_errors(:base).should have_tag('ul li', :count => 1)
+        builder.semantic_errors(:base).should_not have_tag('ul li', "Base #{@base_error}")
+      end
+    end
+  end
+
 end