Django CreateViewの成功メッセージは表示されません

Question

私はCreateViewとUpdateViewの両方に成功メッセージを持っています。ただし、UpdateViewの成功メッセージのみが機能し、CreateViewメッセージは表示されません。なぜこうなった？

from django.contrib.messages.views import SuccessMessageMixin 
class CreateRedirect (CreateView): 
     model = MarketingRedirect 
     template_name = 'marketing_redirect/create_redirect.html' 
     success_url = reverse_lazy('backend_redirect') 
     fields = ['redirect_from', 'redirect_to'] 
     success_message = "Redirect successfully created!" 


    class EditRedirect(SuccessMessageMixin, UpdateView): 
     model = MarketingRedirect 
     fields = ['redirect_from', 'redirect_to'] 
     template_name = 'marketing_redirect/edit_redirect.html' 
     context_object_name = 'redirect' 
     success_url = reverse_lazy('backend_redirect') 
     success_message = 'Review successfully updated' 

Answer 1

は、以下に示すように、クラスCreateRedirectのために継承SuccessMessageMixin：

class CreateRedirect(SuccessMessageMixin, CreateView): 
    ....