Django - 在get_context_data中进行过滤

在Django中使用基于类的视图时，我在DetailView中存在一个问题文件。Django - 在get_context_data中进行过滤

我想得到的是一个特定类型的所有电影列表，即：Movie.objects.all().filter(genre=genre_id)。

class GenreView(generic.DetailView): 
    model = Genre 
    template_name = 'movies/genre.html' 
    context_object_name = 'this_genre' 
def get_context_data(self, **kwargs): 
    context = super(GenreView, self).get_context_data(**kwargs) 
    context.update({ 
     'all_movies': Movie.objects.all().filter(genre=pk), 
     'all_genres': Genre.objects.all() 
    }) 
    return context

我得到这个错误：

Traceback (most recent call last): 
    File "C:\Program Files (x86)\Python35-32\lib\site-packages\django\core\handler 
s\base.py", line 149, in get_response 
    response = self.process_exception_by_middleware(e, request) 
    File "C:\Program Files (x86)\Python35-32\lib\site-packages\django\core\handler 
s\base.py", line 147, in get_response 
    response = wrapped_callback(request, *callback_args, **callback_kwargs) 
    File "C:\Program Files (x86)\Python35-32\lib\site-packages\django\views\generi 
c\base.py", line 68, in view 
    return self.dispatch(request, *args, **kwargs) 
    File "C:\Program Files (x86)\Python35-32\lib\site-packages\django\views\generi 
c\base.py", line 88, in dispatch 
    return handler(request, *args, **kwargs) 
    File "C:\Program Files (x86)\Python35-32\lib\site-packages\django\views\generi 
c\detail.py", line 118, in get 
    context = self.get_context_data(object=self.object) 
    File "C:\Users\admin\trailers\movies\views.py", line 43, in get_context_data 
    'all_movies': Movie.objects.all().filter(genre=pk), 
NameError: name 'pk' is not defined

当我试图用Movie.objects.all().filter(genre=kwargs['pk'])更换Movie.objects.all().filter(genre=pk)我：

Traceback (most recent call last): 
    File "C:\Program Files (x86)\Python35-32\lib\site-packages\django\core\handler 
s\base.py", line 149, in get_response 
    response = self.process_exception_by_middleware(e, request) 
    File "C:\Program Files (x86)\Python35-32\lib\site-packages\django\core\handler 
s\base.py", line 147, in get_response 
    response = wrapped_callback(request, *callback_args, **callback_kwargs) 
    File "C:\Program Files (x86)\Python35-32\lib\site-packages\django\views\generi 
c\base.py", line 68, in view 
    return self.dispatch(request, *args, **kwargs) 
    File "C:\Program Files (x86)\Python35-32\lib\site-packages\django\views\generi 
c\base.py", line 88, in dispatch 
    return handler(request, *args, **kwargs) 
    File "C:\Program Files (x86)\Python35-32\lib\site-packages\django\views\generi 
c\detail.py", line 118, in get 
    context = self.get_context_data(object=self.object) 
    File "C:\Users\admin\trailers\movies\views.py", line 43, in get_context_data 
    'all_movies': Movie.objects.all().filter(genre=kwargs['pk']), 
KeyError: 'pk'

我似乎无法弄清楚什么是错的，任何帮助将不胜感激！

来源

2016-09-23 mari

您能否告诉我您的此类GenreView（generic.DetailView）视图的URL？ – Rajesh

url（r'^ genre /（？P [0-9] +）/ $'，views.GenreView.as_view（），name ='genre'） – mari

的kwargs参数传递给get_context_data不包含对象的主键值。您可以从self.kwargs得到它，但：

Movie.objects.all().filter(genre=self.kwargs['pk'])

而且，你会看到self.object（这是在Genre实例牵强）是存在且可访问，当你在里面get_context_data，这样你就可以使用，为了请执行以下操作：

Movie.objects.all().filter(genre=self.object)

来源

2016-09-23 03:40:27 ozgur

尽管我更喜欢'Movie.objects， all（）。filter（genre = self.object）'谢谢！ – mari

'all_movies': Movie.objects.all().filter(genre=pk)

你几乎没有定义pk。您需要首先将pk分配给pk变量。

你也并不需要包括所有：

Movie.objects.filter(genre=pk)

来源

2016-09-23 03:39:41 ZzCalvinzZ

Django - 在get_context_data中进行过滤

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