2、Django分页代码

Django自带分页方法

# Django分页  
from django.core.paginator import Paginator, PageNotAnInteger, EmptyPage

def index1(request):
    # 获取当前页码数
    num = request.GET.get('num', 1)
    n = int(num)

    # 查询所有数据
    reservoirs = models.ReservoirData.objects.all()

    # 创建分页器对象
    pager = Paginator(reservoirs, 10)    # Paginator(所有数据（页码总页）, 每页展示记录数)

    # 获取当前页的数据
    try:
        perpage_date = pager.page(n)
    except PageNotAnInteger:
        perpage_date = pager.page(1)  # 返回第一页的数据
    except EmptyPage:
        perpage_date = pager.page(pager.num_pages)  # 返回最后一页的数据

    # 每页开始页码
    begin = (n - int(math.ceil(10.0/2)))
    if begin < 1:
        begin = 1

    # 每页结束页码
    end = begin + 9
    if end > pager.num_pages:
        end = pager.num_pages

    if end <= 10:
        begin = 1
    else:
        begin = end - 9
    
    pagelist = range(begin, end+1)

    return render(request, 'reservoir.html', {
    
    'pager': pager, 'perpage_date': perpage_date, 'pagelist': pagelist})