class TestView(View):

    def get(self,request,*args,**kwargs):
        return HttpResponse('Hello')

from django.views.generic import TemplateView

# views.py
class MainView(TemplateView):
    template_name = 'main/home.html'


# urls.py에 바로 코딩할 때.
urlpatterns = [
    path('/',TemplateView.as_view(template_name = 'main/home.html'),name='main')
]

from django.views.generic import DetailView

class PostDetailView(DetailView):
    model = Post

    # 오버라이딩
    def get_queryset(self):
        qs = super().get_queryset()

        if request.user.is_authenticated:
            qs = qs.filter(is_public=True)
        
        return qs

#-- urls.py
re_path(r'^post/?P<slug>[-w\]+)/$', views.PostDetailView.as_view(),name='detail')

from django.views.generic import ListView

class PostListView(ListView):
    model = Post
    template_name = 'instagram/post_list.html'
    context_object_name = 'posts' # default : object_list
    paginate_by = 2

from django.views.generic import FormView

class SearchFormView(FormView):
    form_class = SearchForm
    template_name = 'instagram/post_search.html'
    # success_url = 'instagram:post_list'

    def form_valid(self,form):
        word = form.cleaned_data.get('search_word')
        post_list = Post.objects.filter(
                    Q(title__icontains=word) |
                    Q(description__icontains=word) |
                    Q(content__icontains=word))
        context = {
            'form':form,
            'word':word,
            'post_list':post_list,
        }

        return render(self.request, self.template_name, context)

from django.views.generic import CreateView

class PostCreatView(CreatView):
    model = Post

    # 폼을 만들 때 사용할 필드 정의
    fields = []
    
    # 생성 후 이동할 URL
    success_url = reverse_lazy('instagram:post_list')

    def form_valid(self,form):
        form.instance.owner = self.request.user
        # ModelFormMixin 클래스의 form_valid() 에서 save됨.
        return super().form_valid(form)

#-- views.py
from django.views.generic import UpdateView

class PostUpdateView(UpdateView):
    model = Post
    fields = []
    success_url = reverse_lazy('instagram:post_list')

PostUpdateView = PostUpdateView.as_view()

#-- urls.py
path('<int:pk>/update/', views.PostUpdateView, name='update')

#-- views.py
from django.views.generic import DeleteView

class PostDeleteView(DeleteView):
    model = Post
    success_url = reverse_lazy('instagram:post_list')

PostDeleteView = PostDeleteView.as_view()

#-- urls.py
path('<int:pk>/delete/', views.PostDeleteView, name='delete')

def get_context_data(self,**kwargs):
    context = super().get_context_data(**kwargs)
    context['SearchWord'] = self.kwargs['word']     # 추가 
    return context