基本滴简易的feed系统

模仿之前的Feedly框架，后台消息序列用django-rq，

整个过程就是简单滴生成一个活动-创建一个Activity类，一个用来把活动分发到用户friends的分发函数，然后在需要的时候，把活动传入分发函数中，由消息队列-这里

是django-rq，来调度它

Activity-活动类

from django.contrib.auth import get_user_model



class Activity(object):

    def __init__(self, object_id, muser, user_name, c_date, thumbcontent, mobject_id, mtitle, verb):
        self.object_id = object_id
        self.muser = muser
        self.user_name = user_name
        self.date = c_date
        self.thumbcontent = thumbcontent
        self.mobject_id = mobject_id
        self.mtitle = mtitle
        self.verb = verb

    def get_object_id(self):
        return self.object_id

    def get_muser(self):
        return self.muser

    def get_user_name(self):
        return self.user_name

    def get_date(self):
        return self.c_date

    def get_thumbcontent(self):
        return self.thumbcontent

    def get_mobject_id(self):
        return self.mobject_id
    
    def get_mtitle(self):
        return self.mtitle

    def set_real_user(self):
        self.ruser = get_user_model().objects.get(pk=self.muser)

    def get_verb(self):
        return self.verb

在视图里面，将feed加入消息队列

            feed_obj = tmp_obj.create_activity()            
            feed_list = self.request.user.friends.all()
            redis_c = get_redis_connection('feed_storage')
            feed_queue.enqueue(distr_object, feed_obj, feed_list = feed_list)

将feed分发给要friends

def distr_object(t_object, feed_list):
    redis_c = get_redis_connection('feed_storage')
    pickle_object = pickle.dumps(t_object)
    for i in feed_list:
        redis_c.lpush(i.id, pickle_object)

这里在feed在redis存储的是列表，列表名简单的就是user的id值

在用户的个人页面，简单滴从redis获取用户的feed，然后显示出来

class FeedPage(ListView):
    template_name = 'myapp/index.html'
    model = MyObject
    paginate_by = 30
    context_object_name = 'feedobject'

    def get_queryset(self):
        redis_c = get_redis_connection('feed_storage')
        user_feed = []
        for i in redis_c.lrange(self.request.user.id,0,30):
            j = pickle.loads(i)
            j.set_real_user()
            user_feed.append(j)
        return user_feed