add flag main field for element

@@ -98,7 +98,7 @@ module Kanjai
         @type_contents += page_template.template_parts.where("part_type in ('content')").collect{|p| [p.name, p.code] }
         page_template.template_parts.where("part_type in ('content')").each do |item|
           item.field_options.each do |el|
-            @main_field << el[:name] if el[:mail].to_i == 1
+            @main_field << el[:name] if el[:main].to_i == 1
           end
         end
       end

 module Kanjai
-  VERSION = "0.0.113"
+  VERSION = "0.0.114"
 end