rest_framework 之分页器

一  分页器--准备

1.1  基本参数

# 普通分页
from rest_framework.pagination import PageNumberPagination
# 偏移分页
from rest_framework.pagination import LimitOffsetPagination
# 加密分页
from rest_framework.pagination import CursorPagination

class MyPageNumberPagination(PageNumberPagination):
    # 每页显示多少条
    page_size = 3
    # 查询的key,问号后面的key
    page_query_param = 'aa'
    # 指定当前页显示多少条
    page_size_query_param='size'
    # 每页最多显示多少条
    max_page_size=4

1.2  普通分页

class Book(ViewSetMixin, APIView):
    def get_all(self, request):
        response = {'status': 100, 'msg': '查询成功'}
        book_list = models.Book.objects.all()
        # 实例化产生一个分页对象
        # 不继承来修改对象的值
        page=PageNumberPagination()
        page.page_size=2
        page.page_query_param='bb'
        # page = MyPageNumberPagination()
        # 第一个参数:要分页的数据,第二个参数request对象,第三个参数,当前视图对象
        page_list = page.paginate_queryset(book_list, request, self)
        # 再序列化的时候,用分页之后的数据
        ser = mySer.BookSerializer(instance=page_list, many=True)
        # response['data'] = ser.data
        # return Response(response)
        # 会带着链接,和总共的条数(不建议用)
        return page.get_paginated_response(ser.data)
        # return Response(ser.data)

1.3  偏移分页

# 偏移分页
from rest_framework.pagination import LimitOffsetPagination
class Book(ViewSetMixin, APIView):
    def get_all(self, request):
        response = {'status': 100, 'msg': '查询成功'}
        book_list = models.Book.objects.all()
        # 实例化产生一个偏移分页对象
        page=LimitOffsetPagination()
        page.default_limit=3
        page.max_limit=5

        page_list = page.paginate_queryset(book_list, request, self)
        ser = mySer.BookSerializer(instance=page_list, many=True)
        return Response(ser.data)

1.4  加密分页

from rest_framework.pagination import CursorPagination

class Book(ViewSetMixin, APIView):
    def get_all(self, request):
        response = {'status': 100, 'msg': '查询成功'}
        book_list = models.Book.objects.all()
        # 实例化产生一个加密分页对象
        page = CursorPagination()
        page.ordering = 'nid'

        page_list = page.paginate_queryset(book_list, request, self)
        ser = mySer.BookSerializer(instance=page_list, many=True)
        return page.get_paginated_response(ser.data)

二  settings

REST_FRAMEWORK = {
    # 每页显示两条
    'PAGE_SIZE':2
}

三  路由

url(r'^books/$', views.Book.as_view()),