Ensure labels, errors and hints are not generated for hidden inputs.

lib/simple_form/error.rb

@@ -4,9 +4,17 @@ module SimpleForm
     private
 
       def generate_error
-        return '' unless errors = @object.errors[@attribute]
-        errors = errors.is_a?(Array) ? errors.to_sentence : errors
+        return '' if skip_error? || (errors = find_errors).blank?
+        errors = errors.to_sentence if errors.respond_to?(:to_sentence)
         @template.content_tag(:span, errors, :class => 'error')
       end
+
+      def skip_error?
+        hidden_input?
+      end
+
+      def find_errors
+        @object.errors[@attribute]
+      end
   end
 end

lib/simple_form/form_builder.rb

@@ -46,6 +46,10 @@ module SimpleForm
         end
       end
 
+      def hidden_input?
+        @input_type == :hidden
+      end
+
       def translate_form(scope, default='')
         lookups = [:"#{@object_name}.#{@attribute}", :"#{@attribute}", default]
         translate(lookups.shift, :scope => :"simple_form.#{scope}", :default => lookups)

lib/simple_form/hint.rb

@@ -4,10 +4,14 @@ module SimpleForm
     private
 
       def generate_hint
-        return '' if @options[:hint] == false || (text = hint_text).blank?
+        return '' if skip_hint? || (text = hint_text).blank?
         @template.content_tag(:span, text, :class => 'hint')
       end
 
+      def skip_hint?
+        @options[:hint] == false || hidden_input?
+      end
+
       def hint_text
         @options[:hint] || translate_hint
       end

lib/simple_form/label.rb

@@ -4,12 +4,16 @@ module SimpleForm
     private
 
       def generate_label
-        return '' if @options[:label] == false
+        return '' if skip_label?
         html_options = { :class => "#{@input_type} #{required_class}".strip }
         html_options[:for] = @options[:html][:id] if @options.key?(:html)
         label(@attribute, label_text, html_options)
       end
 
+      def skip_label?
+        @options[:label] == false || hidden_input?
+      end
+
       def label_text
         required_text << (@options[:label] || translate_label)
       end

test/error_test.rb

@@ -30,4 +30,11 @@ class ErrorTest < ActionView::TestCase
     assert_select 'form span.error', "is not a number and must be greater than 18"
     assert_select 'form span.error', "must be present and must be greater than 0"
   end
+
+  test 'errors should not be generated for hidden fields' do
+    simple_form_for @super_user do |f|
+      concat f.input :name, :as => :hidden
+    end
+    assert_no_select 'form span.error'
+  end
 end

test/hint_test.rb

@@ -44,4 +44,11 @@ class ErrorTest < ActionView::TestCase
       assert_no_select 'form span.hint'
     end
   end
+
+  test 'hint should not be generated for hidden fields' do
+    simple_form_for @user do |f|
+      concat f.input :name, :hint => 'Bla bla bla', :as => :hidden
+    end
+    assert_no_select 'form span.hint'
+  end
 end

test/label_test.rb

@@ -145,4 +145,11 @@ class LabelTest < ActionView::TestCase
     assert_select 'form input[id=user_name]'
     assert_select 'form label[for=user_name]'
   end
+
+  test 'label should not be generated for hidden fields' do
+    simple_form_for @user do |f|
+      concat f.input :name, :as => :hidden
+    end
+    assert_no_select 'label'
+  end
 end