博客的文章點(diǎn)贊功能，點(diǎn)贊一次+1，使用session記錄當(dāng)前用戶
問題點(diǎn)就是：在文章1進(jìn)行點(diǎn)贊，文章2點(diǎn)贊就會提示已支持過了，原因判斷出已存在session
如何實(shí)現(xiàn)文章不能重復(fù)點(diǎn)贊

View代碼

class LikeNumView(View):
    def post(self, request):
        if request.session.get('has_like', False):
            return HttpResponse('{"status":"fail", "msg":"已支持過"}', content_type='application/json')
        comments_id = request.POST.get("comments_id", "")
        blog = Blog.objects.get(id=int(comments_id))
        blog.like_number += 1
        blog.save()
        request.session['has_like'] = True
        return HttpResponse('{"status":"success", "msg":"感謝你的支持"}', content_type='application/json')

ajax代碼
function like() {

            $.ajax({
                cache: false,
                type: "POST",
                url: "{% url 'like' %}",
                data: {'comments_id':{{ comments.id }}},
                async: true,
                beforeSend:function(xhr, settings){
                    xhr.setRequestHeader("X-CSRFToken", "{{ csrf_token }}");
                },
                success:function (data) {
                    if (data.status=='fail'){
                        layer.msg("你已支持過")
                    }
                    else {
                        layers.msg("感謝你的支持")
                    }
                }
            })
        }