viewsets post的时候报错
RuntimeError: You called this URL via POST, but the URL doesn't end in a slash and you have APPEND_SLASH set. Django can't redi
rect to the slash URL while maintaining POST data. Change your form to point to 127.0.0.1:8000/blog/viewsets/ (note the trailin
g slash), or set APPEND_SLASH=False in your Django settings.
