first version of multi categories and tags

app/helpers/admin/page_parts_helper.rb

@@ -84,17 +84,17 @@ module Admin::PagePartsHelper
 
   def tag_checked_value(part,radio_value)
     if radio_value.blank?
-      (part.nil? || part[:tag].blank?)? true : false
+      (part.nil? || part[:tag].blank?) ? true : false
     else
-      part and (part[:tag] == radio_value.to_s) ? true : false
+      part and (part[:tag].include?(radio_value.to_s)) ? true : false
     end
   end
 
   def category_checked_value(part,radio_value)
     if radio_value.blank?
-      (part.nil? || part[:category].blank?)? true : false
+      (part.nil? || part[:category].blank?) ? true : false
     else
-      part and (part[:category] == radio_value.to_s) ? true : false
+      part and (part[:category].include?(radio_value.to_s)) ? true : false
     end
   end
 
@@ -117,6 +117,19 @@ module Admin::PagePartsHelper
     end 
   end
 
+  def nil_checkbox_button(part,tag_or_cate)
+    field_name = case part
+    when PagePart
+      'page_part'
+    when Page
+      'page'
+    end
+    content_tag :label,:class=>"radio inline" do 
+      op = check_box_tag("#{field_name}[#{tag_or_cate}][]", 'nil' , eval("#{tag_or_cate}_checked_value(part,'')"),:class=>'select_all')
+      op << I18n.t("default_widget.no_value")
+    end
+  end
+
   def nil_radio_button(part,tag_or_cate)
     field_name = case part
     when PagePart