from django.shortcuts import render
from django.shortcuts import HttpResponse
from newsApp.models import MyNew
from django.db.models import Q
# from productsApp.models import Product
from django.views.decorators.cache import cache_page


# Create your views here.
@cache_page(60 * 15) # 单位：秒数，这里指缓存 15 分钟
def home(request):
    # 新闻展报
    newList = MyNew.objects.all().filter(~Q(
        newType='通知公告')).order_by('-publishDate')
    postList = set()
    postNum = 0
    for s in newList:
        if s.photo:
            postList.add(s)
            postNum += 1
        if postNum == 3:  # 只截取最近的3个展报
            break

    # 新闻列表
    if (len(newList) > 7):
        newList = newList[0:7]

    # 通知公告
    noteList = MyNew.objects.all().filter(
        Q(newType='通知公告')).order_by('-publishDate')
    if (len(noteList) > 4):
        noteList = noteList[0:4]


    # 返回结果
    return render(request, 'home.html', {
        'active_menu': 'home',
        'postList': postList,
        'newList': newList,
        'noteList': noteList,
    })