在Django-rest-framework中捕获参数 [英] Capture parameters in django-rest-framework

问题描述

假设此网址：

http://localhost:8000/articles/1111/comments/

我想获取给定文章的所有评论（此处为1111）。

i'd like to get all comments for a given article (here the 1111).

这就是我捕获的方式该网址：

This is how i capture this url:

url(r'^articles/(?P<uid>[-\w]+)/comments/$', comments_views.CommentList.as_view()),

相关视图如下：

class CommentList(generics.ListAPIView):    
    serializer_class = CommentSerializer
    permission_classes = (permissions.IsAuthenticatedOrReadOnly,)
    lookup_field = "uid"

    def get_queryset(self):
        comments = Comment.objects.filter(article= ???)
        return comments

有关信息，请参见相关的序列化器

For information, the related serializer

class CommentSerializer(serializers.ModelSerializer):
    owner = UserSerializer()

    class Meta:
        model = Comment
        fields = ('id', 'content', 'owner', 'created_at')

如您所见，我已经更新了get_queryset以过滤对文章的评论，但我不知道如何捕捉 ; uid参数。
使用以？uid = value结尾的网址，我可以使用self.request.QUERY_PARAMS.get（‘uid’），但就我而言，我不知道该怎么做。
有什么想法吗？

As you can see, I've updated my get_queryset to filter comments on the article but I don't know how to catch the "uid" parameter. With an url ending with ?uid=value, i can use self.request.QUERY_PARAMS.get('uid') but in my case, I don't know how to do it. Any idea?

推荐答案

url参数存储在 self.kwargs 。 lookup_field 是通用视图在查找单个模型实例时在ORM中使用的字段（默认为pk）， lookup_url_kwarg

The url parameter is stored in self.kwargs. lookup_field is the field (defaults to pk) the generic view uses inside the ORM when looking up individual model instances, lookup_url_kwarg is probably the property you want.

因此，请尝试以下操作：

So try the following:

class CommentList(generics.ListAPIView):    
    serializer_class = CommentSerializer
    permission_classes = (permissions.IsAuthenticatedOrReadOnly,)
    lookup_url_kwarg = "uid"

    def get_queryset(self):
        uid = self.kwargs.get(self.lookup_url_kwarg)
        comments = Comment.objects.filter(article=uid)
        return comments

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