start taking more advantage of class based views

sbas/views.py

@@ -1,5 +1,5 @@
 from reversion.views import RevisionMixin
-from generic.mixins import SuperuserRequiredMixin
+from generic.mixins import CheckCanEditMixin, SuperuserRequiredMixin
 from django.views.generic.detail import DetailView
 from generic.models import CidUser
 from sbas.forms import UserAnswerForm, ExamAuthorForm, ExamForm
@@ -402,7 +402,7 @@ class ExamCreate(ExamCreateBase):
     form_class = ExamForm
 
 
-class ExamUpdate(ExamUpdateBase, AuthorOrCheckerRequiredMixin):
+class ExamUpdate(CheckCanEditMixin, ExamUpdateBase, AuthorOrCheckerRequiredMixin):
     model = Exam
     form_class = ExamForm
 
@@ -428,11 +428,12 @@ class ExamDelete(AuthorOrCheckerRequiredMixin, ExamDeleteBase):
 
 
 class ExamAuthorUpdate(
-    RevisionMixin, LoginRequiredMixin, AuthorRequiredMixin, UpdateView
+    RevisionMixin, CheckCanEditMixin, LoginRequiredMixin, AuthorRequiredMixin, UpdateView
 ):
     model = Exam
     form_class = ExamAuthorForm
 
+    template_name = "author_form.html"
 
 class ExamClone(ExamCloneMixin, ExamCreate):
     """Clone exam view"""