1 files changed, 43 insertions, 0 deletions
diff --git a/actionview/lib/action_view/helpers/tags/collection_check_boxes.rb b/actionview/lib/action_view/helpers/tags/collection_check_boxes.rb
new file mode 100644
index 0000000000..52006d856b
--- /dev/null
+++ b/actionview/lib/action_view/helpers/tags/collection_check_boxes.rb
@@ -0,0 +1,43 @@
+require 'action_view/helpers/tags/collection_helpers'
+
+module ActionView
+  module Helpers
+    module Tags # :nodoc:
+      class CollectionCheckBoxes < Base # :nodoc:
+        include CollectionHelpers
+
+        class CheckBoxBuilder < Builder # :nodoc:
+          def check_box(extra_html_options={})
+            html_options = extra_html_options.merge(@input_html_options)
+            @template_object.check_box(@object_name, @method_name, html_options, @value, nil)
+          end
+        end
+
+        def render(&block)
+          rendered_collection = render_collection do |item, value, text, default_html_options|
+            default_html_options[:multiple] = true
+            builder = instantiate_builder(CheckBoxBuilder, item, value, text, default_html_options)
+
+            if block_given?
+              @template_object.capture(builder, &block)
+            else
+              render_component(builder)
+            end
+          end
+
+          # Append a hidden field to make sure something will be sent back to the
+          # server if all check boxes are unchecked.
+          hidden = @template_object.hidden_field_tag("#{tag_name}[]", "", :id => nil)
+
+          rendered_collection + hidden
+        end
+
+        private
+
+        def render_component(builder)
+          builder.check_box + builder.label
+        end
+      end
+    end
+  end
+end