python - 博士 : Getting related posts by ManyToMany category and a tags field

Question

我试图通过获取当前帖子的 ID 并通过数据库进行过滤来查找属于相似类别或具有相似标签的帖子来获取所有相关帖子。

这是帖子的模型:

class Post(models.Model):
    ....
    author = models.ForeignKey(
        "users.User", on_delete=models.CASCADE, related_name='blog_posts')
    tags = TaggableManager()
    categories = models.ManyToManyField(
        'Category')
    ....
    status = models.IntegerField(choices=blog_STATUS, default=0)

    def __str__(self):
        return self.title

这是views.py文件:

class RelatedPostsListAPIView(generics.ListAPIView):
    serializer_class = PostsSerializer
    queryset = BlogPost.objects.filter(
        status=1)[:5]
    model = BlogPost

def get_context_data(self, **kwargs):
    context = super(RelatedPostsListAPIView,
                    self).get_context_data(**kwargs)
    pk = self.kwargs['pk']
    main_post = BlogPost.objects.get(pk=pk)

    related_posts = main_post.filter(
        Q(categories__in=main_post.categories.all()) |
        Q(tags__in=main_post.tags.all())).exclude(pk=pk)[:5]

    context['related_posts'] = related_posts
    return context

这是序列化器

    class CategoriesSerializer(serializers.ModelSerializer):

    class Meta:
        model = Category
        fields = ['id', 'title', 'slug']


class PostsSerializer(TaggitSerializer, serializers.ModelSerializer):
    categories = CategoriesSerializer(many=True)
    author = UserSerializer()
    tags = TagListSerializerField()
    cover = serializers.SerializerMethodField('get_image_url')

    class Meta:
        model = BlogPost
        fields = [
            "id",
            "title",
            "slug",
            "author",
            "description",
            "content",
            "tags",
            "categories",
            "keywords",
            "cover",
            "created_on",
            "updated_on",
            "status",
        ]

    def get_image_url(self, obj):
        request = self.context.get("request")
        return request.build_absolute_uri(obj.cover.url)

网址模式:

urlpatterns = [
    path('all/', PostsListAPIView.as_view(), name="all_posts"),
    path('recent/', RecentPostsListAPIView.as_view(), name="recent_posts"),
    path('related/<int:pk>/', RelatedPostsListAPIView.as_view(), name="related_posts")
]

使用这段代码，我得到一个 RelatedPostsListAPIView.get() gets multiple values for argument 'pk' 错误，我不认为我实际上得到了带有 id 的对象，任何帮助都是非常感谢。

Answer 1

您还必须在 get() 中捕获request，因此请更改:

class RelatedPostsListAPIView(generics.ListAPIView):
    def get(self, pk):
        # ...

至:

class RelatedPostsListAPIView(generics.ListAPIView):
    def get(self, request, pk):
        #         ^^^ Add this