如何获得与 django Rest Framework 中的帖子相对应的评论？

Question

我将创建一个 API，当我向路由器发送请求并将评论附加到帖子的 pk 值时，它只会显示帖子中的评论。所以网址如下。写完py和views.py后，发送请求，出现404错误。如何通过编写 API 来获取评论？这是我制作的代码。urls.pyurlpatterns = [    path('post', CreateReadPostView.as_view({'post': 'create', 'get': 'list'})),    path('post/<int:pk>', UpdateDeletePostView.as_view({'put': 'update', 'patch': 'partial_update', 'delete': 'destroy'})),    path('post/<int:post.pk>/comments', CreateReadCommentView.as_view({'post': 'create', 'get': 'list'})),] + static(settings.MEDIA_URL, document_root=settings.MEDIA_ROOT)views.pyclass CreateReadCommentView (ModelViewSet) :    serializer_class = CommentSerializer    permission_classes = [IsAuthenticated]    queryset = Comment.objects.all()    def perform_create (self, serializer) :        serializer.save(author=self.request.user)

Answer 1

您可以重写该get_queryset()方法。

models.py

class Post(models.Model):

    ...

class Comment(models.Model):

    post = models.ForeignKey(Post, on_delete=models.CASCADE)

    ...

urls.py

urlpatterns = [

    ...

    path('post/<int:post_id>/comments', CreateReadCommentView.as_view({'post': 'create', 'get': 'list'})),

]

views.py

class CreateReadCommentView (ModelViewSet):

    serializer_class = CommentSerializer

    permission_classes = [IsAuthenticated]

    queryset = Comment.objects.all()

    def perform_create(self, serializer):

        serializer.save(author=self.request.user)

    def get_queryset(self):

        return super().get_queryset().filter(post=self.kwargs.get('post_id'))