I found out part of my code has problem, althogh I don't know why it didn't output an error.
Anyway, thank you for reply. -- You received this message because you are subscribed to the Google Groups "Django users" group. To unsubscribe from this group and stop receiving emails from it, send an email to django-users+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/django-users/106caf50-87ae-4961-acf8-cae0ba85b728%40googlegroups.com.
