Drf:通过许多类别和标签字段获取相关帖子

Question

我试图通过获取当前帖子的id并通过DB过滤以找到在类似类别或具有类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)

url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")
]

与此代码，我得到一个RelatedPostsListAPIView.get() got multiple values for argument 'pk'错误，我不认为我实际上得到的对象与id，任何帮助将不胜感激。

Answer 1

您还必须在get()中捕获request，因此更改:

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

:

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