如何显示Forms.ValidationError友好？ -Django

Question

我想知道如何在form.save之前显示对Django forms.ValidationError/message.error友好，而messages.error无效并且ValidationError像程序bug一样丑陋不适用于客户：

views.py的部分代码如下：

class ProjectCreateView(CreateView):
    model = Project
    form_class = ProjectForm

    def form_valid(self, form):
        request = self.request

        for u in user_project:
            user_times = int(sum(t['learn_times'] for t in times))
            if user_times >= 8 or int(request.POST.get('learn_times')) + user_times >= 8:

                # messages.error didn't work
                messages.error(self.request, u.username + "'s learn_times is more than 8 hours, please check!")

                # ValidationError is ugly like a bug of program not for clients
                raise forms.ValidationError(str(u) + "'s learn_times is more than 8 hours, please check!"

            else:
                pass

        project = form.save(commit=False)
        project.save()
        form.save_m2m()

        messages.success(self.request, 'Project created successfully！')
        return super(CoursePermitCreateView, self).form_valid(form)

    def get_success_url(self):
        return reverse('project_change', kwargs={'pk': self.object.pk})

我不能在forms.py中添加forms.ValidationError，也不能在views.py中添加form.add_error，如下面的代码屏幕快照{code link），就像我添加test = Test.objects时一样.get（pk = self.kwargs ['pk']）在form.py的ProjectForm中，我将得到'ProjectForm' object has no attribute 'kwargs'的错误！并且如果我在Forms.py的Projectform中使用request.POST.get()，也会得到'ProjectForm' object has no attribute request的错误。

非常感谢您提供任何建议。