Django 项目试炼blog(6) -- 文章详情页1 -- 点赞功能
url
#文章详情页 re_path(r'(?P<username>\w+)/article/(?P<article_id>\d+)/$',views.article), # 点赞 path('up_down/', views.up_down),
views
from django.db.models import F
def up_down(request): sign = request.POST.get('sign') sign = json.loads(sign) # 前端数据默认以json传来,将‘true’进换成布尔值 article_id = request.POST.get('article_id') send_info = {'state': True} obj = ArticleUpDown.objects.filter(article_id=article_id, user_id=request.user.pk).first() if not obj: ArticleUpDown.objects.create(is_up=sign, article_id=article_id, user_id=request.user.pk) if sign == True: Article.objects.filter(pk=article_id).update(up_count=F('up_count') + 1) else: Article.objects.filter(pk=article_id).update(down_count=F('down_count') + 1) else: send_info['state'] = False # 用户已对文章进行过操作 send_info['handled'] = obj.is_up # 对文章的Up or Down操作 print(send_info) return JsonResponse(send_info)
前端
<div id="div_digg" class="pull-right"> {#功能效果一样时,给与同一个类名进行jquery操作#} <div class="diggit action" > <span class="diggnum" id="digg_count">{{ art_obj.up_count }}</span> </div> <div class="buryit action" > <span class="burynum" id="bury_count">{{ art_obj.down_count }}</span> </div> <div><span class="up_down_info" style="color: red;margin-left: 10px"></span></div> </div> <div style="clear: both"></div>
Jquery
$(function () { {#点赞哪个用户对哪篇文章进行了点赞操作(用户即为登陆用户)#} $('.action').click(function () { var $obj = $(this).children('span'); var sign = ''; if($(this).children().attr('class')==='diggnum'){ sign = true } else { sign = false }
{#在jQuery使用ajax后$(this)失效#} $.ajax({ url:'/up_down/', type:'post', data:{ 'sign':sign, 'article_id':"{{ art_obj.pk }}", 'csrfmiddlewaretoken':$("[name='csrfmiddlewaretoken']").val() }, success:function(data){ console.log(data); {#判断用户是否已操作#} if(data['state'] === false){ if(data['handled']===true){ $('.up_down_info').text('你已经支持过'); setTimeout(function () {$('.up_down_info').text('')},1000) } else{ $('.up_down_info').text('你已经反对过'); setTimeout(function () {$('.up_down_info').text('')},1000) } }else{ nub = $obj.text(); $obj.text(parseInt(nub)+1) } } }) });
重点:
1、点赞框,反对框(因为功能一样)设置统一类名,在jquery事件中再判断“赞”与“反对”
2、前端ajax数据以json数据传输至后端,需要转序列
3、点赞数两种显示,ajax动态显示,render显示