Javascript 空AJAX PUT请求体；Django Rest API

我在模仿StackOverflow对问题/答案的投票模板。单击向上投票/向下投票按钮后，将向API发送一个

PUT

请求。但是，DRF在相应的视图中找不到作为

request.data=={}

附加到请求正文的任何数据。我应该如何修复客户端API调用或API本身，以便有一个请求主体

vote_button.addEventListener("click", function(event) {
    voted_post = this.id.split("_")
    const _question = voted_post[0];
    q_id = _question[_question.length - 1]
    vote = voted_post[-1]

    const headers = new Headers({
      "Accept": "application/json",
      "Content-Type": "application/json",
      "X-CSRFToken": csrftoken
    });

    const request = new Request(
      `http://localhost:8000/api/v1/questions/${q_id}/`, {
        "method": "put",
        "headers": headers,
        "body": JSON.stringify({
          "vote": vote
        })
      }
    );

    fetch(request).then((response) => {
      if (response.ok) {
        return response.json()
      }
    }).then((data) => {
      let vote_tally = document.getElementById(`question${q_id}_tally`);
      vote_tally.textContent = data['vote_tally']
    })

REST_FRAMEWORK = {
    'TEST_REQUEST_DEFAULT_FORMAT': 'json',
    'DEFAULT_PARSER_CLASSES': [
        'rest_framework.parsers.JSONParser'
    ],
    'DEFAULT_RENDERER_CLASSES': [
        'rest_framework.renderers.JSONRenderer'
    ],
    'DEFAULT_PERMISSION_CLASSES': [
        'rest_framework.permissions.IsAuthenticated'
    ],
    'DEFAULT_AUTHENTICATION_CLASSES': [
        'rest_framework.authentication.SessionAuthentication'
    ],
    'DEFAULT_THROTTLE_CLASSES': [
        'rest_framework.throttling.ScopedRateThrottle'
    ],
    'DEFAULT_THROTTLE_RATES': {
        'voting': '5/minute'
    }
}

class UserQuestionVoteView(APIView):

    throttle_scope = "voting"

    def put(self, request, id):
        account = UserAccount.objects.get(user=request.user)
        question = get_object_or_404(Question, id=id)
        if account == question.user_account:
            return Response(data={
                'vote': "Cannot vote on your own question"
            }, status=400)
        try:
            stored_vote = QuestionVote.objects.get(
                account=account, question=question
            )
            serializer = QuestionVoteSerializer(stored_vote, request.data)
        except QuestionVote.DoesNotExist:
            serializer = QuestionVoteSerializer(data=request.data)
        finally:
            if serializer.is_valid(raise_exception=True):
                question_vote = serializer.save(
                    account=account,
                    question=question
                )
                vote = serializer.validated_data['vote']
                if vote == "downvote":
                    question.vote_tally = F('vote_tally') - 1
                else:
                    question.vote_tally = F('vote_tally') + 1
                question.save()
                question.refresh_from_db()
                return Response(data={
                    'id': question.id,
                    'tally': question.vote_tally
                })
            return Response(serializer.errors)