Django 1.11.1
你能看看回溯吗？
我无法理解干扰SingleObjectMixin和DeletionMixin中的内容。
你能帮我一把吗？
回溯：
File "/home/michael/PycharmProjects/photoarchive_2/photoarchive/frameplaces/views.py", line 53, in <module>
DeleteView):
TypeError: Cannot create a consistent method resolution
order (MRO) for bases object, SingleObjectMixin, DeletionMixin
class FramePlaceDelete(SubmodelDeleteHistoryMixin,
DeleteView):
model = FramePlace
class SubmodelDeleteHistoryMixin(GeneralHistoryMixin,
DeletionMixin):
operation = "-" # For FramePlaceHistoryMixin.
def delete(self, request, *args, **kwargs):
# DeleteView differs from CreateView and UpdateView:
# it doesn't validate the form.
# And we also need the object in save_history().
self.object = self.get_object()
super(SubmodelDeleteHistoryMixin, self).save_history()
success_url = self.get_success_url()
self.object.delete()
return HttpResponseRedirect(success_url)
稍后添加：
class GeneralHistoryMixin(ModelFormMixin):
"""
For some objects we need history.
"""
operation = "+"
def save_history(self):
pass # Override it every time in subclasses.
def form_valid(self, form):
self.object = form.save()
if form.has_changed():
self.save_history() # The method form_valid is redefined for this very string.
# string.
return HttpResponseRedirect(self.get_success_url())