add custom field feature and fix some error

lib/ask/engine.rb

@@ -1,6 +1,18 @@
 module Ask
   class Engine < ::Rails::Engine
     initializer "ask" do
+      begin
+        require File.expand_path('../../../app/models/ask_setting', __FILE__)
+        require File.expand_path('../../../app/models/ask_setting_index', __FILE__)
+        if defined? AskSetting && AskSetting.first.nil?
+          AskSetting.create()
+        end
+        if defined? AskSettingIndex && AskSettingIndex.first.nil?
+          AskSettingIndex.create()
+        end
+      rescue => e
+        puts ['AskSetting not found',e]
+      end
       OrbitApp.registration "Ask", :type => "ModuleApp" do
         module_label "ask.ask"
         base_url File.expand_path File.dirname(__FILE__)
@@ -23,6 +35,11 @@ module Ask
                                 :priority=>1,
                                 :active_for_action=>{'admin/asks'=>'index'},
                                 :available_for => 'users'
+          context_link 'ask.setting',
+                                :link_path=>"setting_admin_asks_path" ,
+                                :priority=>5,
+                                :active_for_action=>{'admin/asks'=>'setting'},
+                                :available_for => 'managers'
           context_link 'categories',
                                 :link_path=>"admin_module_app_categories_path" ,
                                 :link_arg=>"{:module_app_id=>ModuleApp.find_by(:key=>'ask').id}",