In most cases, we write view functions in views.py. However, we may write many duplicate codes such as post_list = Post.objects.all() and post = get_object_or_404(Post, pk = pk). In order to solve this problem, Django provides us generic view class. There are two common class we can inherite. One is ListView, the other is DetailView.

Class based view

1
2
3
4
5
6
7
8
class PostView(ListView):
    model = Post
    template_name = 'blog/index.html'
    context_object_name = 'post_list'

    def get_queryset(self):
        cate = get_object_or_404(Category, pk=self.kwargs.get('pk'))
        return super(CategoryView, self).get_queryset().filter(category=cate)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
class PostDetailView(DetailView):
    model = Post
    template_name = 'blog/detail.html'
    context_object_name = 'post'

    def get(self, request, *args, **kwargs):
        # rewrite get method to implemente extra functions
        response = super(PostDetailView, self).get(request, *args, **kwargs)
        self.object.increase_views()
        # return HttpResponse object
        return response
    def get_context_data(self, **kwargs):
        # rewrite get_context_data method to return extra context data
        context = super(PostDetailView, self).get_context_data(**kwargs)
        form = CommentForm()
        comment_list = self.object.comment_set.all()
        context.update({
            'form': form,
            'comment_list': comment_list
        })
        return context

Mixin