类型对象“Post”没有属性“filter”

Question

每次我试图在帖子上发表评论时，我都会在帖子编号处得到一个AttirbuteError。例如- 'AttributeError at /post/54/'，下面写着'type object 'Post‘没有’filter‘属性。然后，它将我转到我的views.py第58行，其内容为：post = self.get_object(Post)。它是我的PostDetailClass的一部分：

class PostDetailView(DetailView):
    model = Post
    
    form = CommentForm
    
    def post(self, request, *args, **kwargs):
        form = CommentForm(request.POST)
        if form.is_valid():
            post = self.get_object(Post)
            form.instance. user = request.user
            form.instance.post = post
            reply_id = request.POST.get('comment_id')
            comment_qs = None
            if reply_id:
                comment_qs = Comment.objects.get(id=reply_id)
            reply = comment_qs, reply=None
            form.save()
            form.save_m2m()

            return redirect(reverse("post", kwargs={
                'content': Post.content
            }))

urls.py

    from django.urls import path
    from django.conf import settings
    from django.conf.urls.static import static
    from django.urls.conf import re_path
    from django.views.generic.base import RedirectView
    from .views import ( 
        PostListView, 
        PostDetailView, 
        PostCreateView,
        PostDeleteView,
        UserPostListView,
        TagIndexView,
        about,
    )
    from . import views

    urlpatterns = [
        path('', PostListView.as_view(), name='blog-home'),
        path('post/<int:pk>/', PostDetailView.as_view(), name='post- 
   detail'),
        path('user/<str:username>', UserPostListView.as_view(), 
    name='user-posts'),
        path('post/new', PostCreateView.as_view(), name='post-create'),
        path('about/', views.about, name='blog-about'),
        path('map/', views.map, name='blog-map'),
        path('post/<int:pk>/delete/', PostDeleteView.as_view(), 
    name='post-delete'),
        path('latest-posts/', views.latest_posts, name='latest-posts'),
        path('focused/', views.focused, name='focused'),
        path('snakegame/',views.snake_game, name='snake-game'),
        re_path(r'^tag/(?P<slug>[-\w]*)/$',TagIndexView.as_view(), 
    name='tagged')

    ]+ static(settings.MEDIA_URL, document_root=settings.MEDIA_ROOT)

有人能指出我的代码出了什么问题吗？谢谢。

Answer 1

该问题源于将Post传递给self.get_object()。get_object接受查询集作为其参数。queryset对象应该有.filter()，但没有Post。

在这种情况下，您实际上不需要向self.get_object传递任何内容。当您没有向它传递任何东西时，查询集默认为self.get_queryset()。

简而言之，将该行更改为：

post = self.get_object()

Answer 2

你应该先尝试获取post对象，如下所示：

object_id = self.kwargs[self.pk_url_kwarg]
post = self.model.objects.get(id=object_id)

在你的post方法中：

def post(self, request, *args, **kwargs):
    form = CommentForm(request.POST)
    if form.is_valid():
        object_id = self.kwargs[self.pk_url_kwarg]
        post = self.model.objects.get(id=object_id)
        form.instance.user = request.user
        form.instance.post = post
        reply_id = request.POST.get('comment_id')
        comment_qs = None
        if reply_id:
            comment_qs = Comment.objects.get(id=reply_id)
        reply = comment_qs, reply=None
        form.save()
        form.save_m2m()

        return redirect(reverse("post", kwargs={
            'content': post.content
        }))