Python 在CBV Django中处理多个异常
是否有一种方法可以处理来自不同模型的异常,并且仍然不作为上下文单独传递任何异常 Views.pyPython 在CBV Django中处理多个异常,python,django,Python,Django,是否有一种方法可以处理来自不同模型的异常,并且仍然不作为上下文单独传递任何异常 Views.py class ProfilePage(DetailView): model = models.UserCreation context_object_name = 'profile' def get_context_data(self, *args, **kwargs): context = super(ProfilePage, self).get_conte
class ProfilePage(DetailView):
model = models.UserCreation
context_object_name = 'profile'
def get_context_data(self, *args, **kwargs):
context = super(ProfilePage, self).get_context_data(*args, **kwargs)
user = User.objects.get(username=UserCreation.objects.get(id=self.kwargs.get('pk')))
print(self.request.user,user,self.kwargs.get('pk'))
try:
context['data'] = ProfileData.objects.get( user=user)
context['userdata'] = User.objects.get( username=user)
context['creationdata'] = UserCreation.objects.get(user=user)
context['friends'] = Friends.objects.get( user=self.request.user,added=user)
context['sorted'] = sorted(chain(AddStatus.objects.filter(user=user), ImageLib.objects.filter(user=user)),
key=lambda instance: instance.date, reverse=True)
except ((ProfileData.DoesNotExist as e) or (Friends.DoesNotExistas as f)) :
if e:
context['data']= None
elif f:
context['friends'] = None
return context
是的,您应该使用两个
try
-范围,但范围除外。事实上,最好不要写长的try
-范围之外的内容,因为这样就不清楚是什么触发了异常。因此,您可以这样实现:
try:
context['data'] = ProfileData.objects.get( user=user)
except ProfileData.DoesNotExist:
context['data']= None
context['userdata'] = User.objects.get( username=user)
context['creationdata'] = UserCreation.objects.get( user=user)
try:
context['friends'] = Friends.objects.get( user=self.request.user,added=user)
except Friends.DoesNotExist:
context['friends'] = None
context['sorted'] = sorted(
chain(AddStatus.objects.filter(user=user),
ImageLib.objects.filter(user=user)),
key=lambda instance: instance.date, reverse=True
)
如果有多个ProfileData
s等不是问题,您可以使用.first()
代替,如果没有要返回的行,它将返回None
:
context['data'] = ProfileData.objects.filter(user=user).first()
context['userdata'] = User.objects.get(username=user)
context['creationdata'] = UserCreation.objects.get(user=user)
context['friends'] = Friends.objects.filter( user=self.request.user,added=user).first()
context['sorted'] = sorted(
chain(AddStatus.objects.filter(user=user),
ImageLib.objects.filter(user=user)),
key=lambda instance: instance.date, reverse=True
)