未显示Django CreateView成功消息

Question

我有一个CreateView和UpdateView，两者都有成功消息。但是，只有UpdateView成功消息有效，并且不显示CreateView消息。为什么会这样？

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

为类CreateRedirect继承 SuccessMessageMixin ，如下所示：

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