英文:
KeyError at /x/x/ 'pk' django
问题
views.py
class MangaView(DetailView):
model = Manga
template_name = 'mangas/manga.html'
context_object_name = 'manga'
slug_field = 'manga_slug'
slug_url_kwarg = 'manga_slug'
def get_context_data(self, **kwargs):
data = super().get_context_data(**kwargs)
manga = get_object_or_404(Manga, id=self.kwargs['pk']) # error line
favorited = False
latered = False
...
return data
urls.py
urlpatterns = [
path('mangas/', MangasHomeView.as_view(), name='mangas-home'),
path('manga/<slug:manga_slug>/', MangaView.as_view(), name='manga'),
...
]
请注意，代码部分没有进行翻译。
英文:
I'm trying to get a DetailView's model's pk in a variable in the get_context_data but I keep getting the error KeyError at /x/x/ 'pk'.
views.py
class MangaView(DetailView):
model = Manga
template_name = 'mangas/manga.html'
context_object_name = 'manga'
slug_field = 'manga_slug'
slug_url_kwarg = 'manga_slug'
def get_context_data(self, **kwargs):
data = super().get_context_data(**kwargs)
manga = get_object_or_404(Manga, id=self.kwargs['pk']) # error line
favorited = False
latered = False
...
return data
urls.py
urlpatterns = [
path('mangas/', MangasHomeView.as_view(), name='mangas-home'),
path('manga/<slug:manga_slug>/', MangaView.as_view(), name='manga'),
...
]
答案1
得分: 2
你看到的错误是因为尝试通过self.kwargs访问pk值，而实际上你的视图正在使用slug字段和slug URL参数。
尝试使用self.get_object()，因为它会在DetailView中为你提供当前实例，无论是pk还是slug，如下所示：
class MangaView(DetailView):
model = Manga
template_name = 'mangas/manga.html'
context_object_name = 'manga'
slug_field = 'manga_slug'
slug_url_kwarg = 'manga_slug'
def get_context_data(self, **kwargs):
data = super().get_context_data(**kwargs)
manga = self.get_object()
favorited = False
latered = False
...
return data
英文:
The error you are seeing is caused by trying to access the pk value through self.kwargs, when in fact your view is using a slug field and slug URL parameter.
Try to use self.get_object() as it gives you current instance in DetailView whether it is pk or slug so:
class MangaView(DetailView):
model = Manga
template_name = 'mangas/manga.html'
context_object_name = 'manga'
slug_field = 'manga_slug'
slug_url_kwarg = 'manga_slug'
def get_context_data(self, **kwargs):
data = super().get_context_data(**kwargs)
manga = self.get_object()
favorited = False
latered = False
...
return data
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