点赞

<div class="art_info clearfix">
                <div class="left up_down">
                    <div class="up" onclick="info_post(this)">
                        <div><i class="fa fa-thumbs-up" aria-hidden="true"></i></div>
                        <div id="digg-up">赞一下({{ article_info.up_count }})</div>
                    </div>
                </div>
                <div class="left up_down clearfix">
                    <div class="down" onclick="info_post(this)">
                        <div><i class="fa fa-thumbs-down" aria-hidden="true"></i></div>
                        <div id="digg-down">踩一下({{ article_info.down_count }})</div>
                    </div>
                </div>
            </div>
            <div class="clearfix">
                {% if updown_info.updown__up == False %}
                    <div id="msg">你已点踩</div>
                {% elif updown_info.updown__up == True %}
                    <div id="msg">你已点赞</div>
                {% else %}
                    <div id="msg"></div>
                {% endif %}
            </div>

<script src="/static/jquery-3.2.1.js"></script>
    <script src="/static/jquery.cookie.js"></script>
    <script>
        //点赞事件
        function info_post(cls) {
            var token = $.cookie('csrftoken');
            var article_id = {{ article_info.nid}}
                $.ajax({
                    url: '/operate/up_down.html',
                    type: 'POST',
                    headers: {'X-CSRFToken': token},
                    data: {'article_id': article_id, 'way': $(cls).prop("className")},
                    dataType: 'JSON',
                    success: function (arg) {
                        if (arg.status == 0) {
                            $('#msg').text(arg.msg);//已经点过赞
                            if (arg.msg = "取消点踩") {
                                $('#digg-down').text("踩一下" + "(" + (arg.count) + ")");
                            }
                            else {
                                //点踩
                                $('#digg-down').text("踩一下" + "(" + (arg.count) + ")");
                            }
                        }
                        if (arg.status == 1) {
                            $('#msg').text(arg.msg);//你已点踩
                            if (arg.msg == '取消点赞') {
                                $('#digg-up').text("赞一下" + "(" + (arg.count) + ")");
                            }
                            else {
                                //点赞
                                $('#digg-up').text("赞一下" + "(" + (arg.count) + ")");
                            }
                        }
                    }
                })
<script>

def up_down(request):
    """
    网页最终页点赞
    :param request:
    :return:
    """
    click_username = request.session.get('username')
    if not click_username:
        return redirect('/login/')
    way = request.POST.get('way')
    article_id = request.POST.get('article_id')
    count_obj = models.Article.objects.filter(nid=article_id).first()
    up_count = count_obj.up_count
    down_count = count_obj.down_count
    userinfo = models.UserInfo.objects.filter(username=click_username).first()
    click_username_id = userinfo.nid
    ret = {'status': None, 'msg': None, 'count': None}
    count = None
    try:
        with transaction.atomic():
            obj = models.UpDown.objects.filter(article_id=article_id, user_id=click_username_id).first()
            if obj.up == 1:
                if way == "up":
                    # 取消点赞
                    # 删除关系表
                    models.UpDown.objects.filter(article_id=article_id, user_id=click_username_id).delete()
                    # 统计点赞数
                    count = up_count - 1
                    count = 0 if count <= 0 else count
                    models.Article.objects.filter(nid=article_id).update(up_count=count)
                    ret['status'] = 1
                    ret['msg'] = '取消点赞'
                else:
                    # 点踩
                    ret['status'] = 0
                    count = down_count
                    ret['msg'] = '你已点赞'
            if obj.up == 0:
                if way == "up":
                    # 点赞
                    ret['status'] = 1
                    count = up_count
                    ret['msg'] = '你已点踩'
                else:
                    # 取消点踩
                    models.UpDown.objects.filter(article_id=article_id, user_id=click_username_id).delete()
                    count = down_count - 1
                    count = 0 if count <= 0 else count
                    models.Article.objects.filter(nid=article_id).update(down_count=count)
                    ret['status'] = 0
                    ret['msg'] = '取消点踩'
                    # 没有关系，既没有点赞也没有点踩
                    if way == "up":
                        models.UpDown.objects.create(article_id=article_id, user_id=click_username_id, up=1)
                        count = up_count + 1
                        models.Article.objects.filter(nid=article_id).update(up_count=count)
                        ret['status'] = 1
                        ret['msg'] = '点赞成功'
                    else:
                        models.UpDown.objects.create(article_id=article_id, user_id=click_username_id, up=0)
                        count = down_count + 1
                        models.Article.objects.filter(nid=article_id).update(down_count=count)
                        ret['status'] = 0
                        ret['msg'] = '点踩成功'

    except:
        pass
    ret['count'] = count

    return HttpResponse(json.dumps(ret))