Add full_error.

CHANGELOG.rdoc

@@ -11,6 +11,7 @@
   * Add option to disable all HTML5 extensions (by github.com/wolframarnold)
   * Add input_field helper to form builder (by github.com/jeroenhouben)
   * Allow inputs to be discovered on demand by placing them at app/inputs (a la formtastic)
+  * Add full_error on that shows the error with the attribute name
 
 * bug fix
   * Fix for file attributes automatic detection, to work with virtual attributes

lib/simple_form/components/errors.rb

@@ -12,7 +12,11 @@ module SimpleForm
       end
 
       def error_text
-        errors.send(error_method)
+        if options[:error_prefix]
+          options[:error_prefix] + " " + errors.send(error_method)
+        else
+          errors.send(error_method)
+        end
       end
 
       def error_method

lib/simple_form/form_builder.rb

@@ -204,6 +204,24 @@ module SimpleForm
       SimpleForm::Inputs::Base.new(self, attribute_name, column, input_type, options).error
     end
 
+    # Return the error but also considering its name. This is used
+    # when errors for a hidden field need to be shown.
+    #
+    # == Examples
+    #
+    #    f.full_error :token #=> <span class="error">Token is invalid</span>
+    #
+    def full_error(attribute_name, options={})
+      prefix = options.delete(:prefix) || if object.class.respond_to?(:human_attribute_name)
+        object.class.human_attribute_name(attribute_name.to_s)
+      else
+        attribute_name.to_s.humanize
+      end
+
+      options[:error_prefix] = prefix
+      error(attribute_name, options)
+    end
+
     # Creates a hint tag for the given attribute. Accepts a symbol indicating
     # an attribute for I18n lookup or a string. All the given options are sent
     # as :hint_html.

test/form_builder_test.rb

@@ -27,6 +27,12 @@ class FormBuilderTest < ActionView::TestCase
     end
   end
 
+  def with_full_error_for(object, *args)
+    with_concat_form_for(object) do |f|
+      f.full_error(*args)
+    end
+  end
+
   def with_hint_for(object, *args)
     with_concat_form_for(object) do |f|
       f.hint(*args)
@@ -455,6 +461,22 @@ class FormBuilderTest < ActionView::TestCase
     assert_select 'span.error#name_error', "can't be blank"
   end
 
+  # FULL ERRORS
+  test 'builder should generate an full error tag for the attribute' do
+    with_full_error_for @user, :name
+    assert_select 'span.error', "Super User Name! can't be blank"
+  end
+
+  test 'builder should generate an full  error tag with a clean HTML' do
+    with_full_error_for @user, :name
+    assert_no_select 'span.error[error_html]'
+  end
+
+  test 'builder should allow passing options to full error tag' do
+    with_full_error_for @user, :name, :id => 'name_error', :prefix => "Your name"
+    assert_select 'span.error#name_error', "Your name can't be blank"
+  end
+
   # HINTS
   test 'builder should generate a hint tag for the attribute' do
     store_translations(:en, :simple_form => { :hints => { :user => { :name => "Add your name" }}}) do