add access methods for delete

app/models/journals_for_message.rb

@@ -28,6 +28,16 @@ class JournalsForMessage < ActiveRecord::Base
 
   # default_scope { where('m_parent_id IS NULL') }
 
+  def remove_by_user? user
+    if(  self.user == user || 
+       ( self.jour.kind_of?(User) && self.jour== user )
+      )
+      true
+    else
+      false
+    end
+  end
+  
   def self.delete_message(message_id)
     self.find(message_id).destroy
     # self.destroy_all "id = #{message_id}"