1.分页 a. 分页 看第n页 每页显示n条数据: b. 分页 在某个位置 向后查看多少条数据 c. 加密分页 上一页和下一页 本质：查看 记住页码id的最大值和最小值 通过其来准确扫描 过去的话 会从id 1到n扫描 第一种分页 api下的utils.serializers.pager.py from rest_framework import serializers from api import models class PagerSerialiser(serializers.ModelSerializer): class Meta: model = models.Role fields = "__all__" url里写 from django.contrib import admin from api import views from django.conf.urls import url urlpatterns = [ url(r‘^pager1/‘, views.Pager1View.as_view()) ] 视图里写 from rest_framework.response import Response from api.utils.serializers.pager import PagerSerialiser from rest_framework.pagination import PageNumberPagination class MyPageNumberPagination(PageNumberPagination): page_size=2 #默认两个 page_size_query_param = ‘size‘ #传一个size参数 一页显示多少 http://127.0.0.1:8000/pager1/?page=1&size=3 max_page_size = 5 #一页显示最大5个 page_query_param = ‘page‘ #页码 class Pager1View(APIView): def get(self,request, *args,**kwargs): #获取所有数据 roles = models.Role.objects.all() #创建分页对象 pg = MyPageNumberPagination() #在数据库中获取分页数据 pager_roles = pg.paginate_queryset(queryset=roles, request=request,view=self) print(pager_roles) #对分页数据进行序列化 ser = PagerSerialiser(instance=pager_roles, many=True) return pg.get_paginated_response(ser.data) #返回上一页或者下一页 第二种分页 索引值最大最小值分页 视图函数 from django.shortcuts import render,HttpResponse import json # Create your views here. from rest_framework.views import APIView from rest_framework import serializers from api import models class UserInfoserializer(serializers.ModelSerializer): group = serializers.HyperlinkedIdentityField(view_name=‘gp‘,lookup_field=‘group_id‘,lookup_url_kwarg=‘pk‘) class Meta: model = models.UserInfo # fields = ‘__all__‘ fields = [‘group‘] depth = 0 #0到3 4层 class UserInfoView(APIView): def get(self,request, *arg, **kwargs): users = models.UserInfo.objects.all() ser = UserInfoserializer(instance=users, many=True,context={‘request‘: request}) #必须添加 context = {‘request‘:request} ret = json.dumps(ser.data, ensure_ascii = False) return HttpResponse(ret) class GroupSerializer(serializers.ModelSerializer): class Meta: model = models.UserGroup fields = ‘__all__‘ class GroupView(APIView): def get(self,request,*args,**kwargs): pk = kwargs.get(‘pk‘) obj = models.UserGroup.objects.filter(pk=pk).first() ser = GroupSerializer(instance=obj, many=False) ret = json.dumps(ser.data,ensure_ascii=False) return HttpResponse(ret) from rest_framework.response import Response from api.utils.serializers.pager import PagerSerialiser from rest_framework.pagination import PageNumberPagination,LimitOffsetPagination class MyPageNumberPagination(PageNumberPagination): page_size=2 #默认两个 page_size_query_param = ‘size‘ #传一个size参数 一页显示多少 http://127.0.0.1:8000/pager1/?page=1&size=3 max_page_size = 5 #一页显示最大5个 page_query_param = ‘page‘ #页码 class MyPagenumber2Pagination(LimitOffsetPagination): default_limit = 3 limit_query_param = ‘limit‘ #每页多少条数据 offset_query_param = ‘offset‘ #第几个索引开始 max_limit = 5 class Pager1View(APIView): def get(self,request, *args,**kwargs): #获取所有数据 roles = models.Role.objects.all() #创建分页对象 pg = MyPagenumber2Pagination() #在数据库中获取分页数据 pager_roles = pg.paginate_queryset(queryset=roles, request=request,view=self) print(pager_roles) #对分页数据进行序列化 ser = PagerSerialiser(instance=pager_roles, many=True) # return pg.get_paginated_response(ser.data) #返回上一页或者下一页 return Response(ser.data) 分页第三种：cursion from rest_framework.response import Response from api.utils.serializers.pager import PagerSerialiser from rest_framework.pagination import PageNumberPagination,LimitOffsetPagination,CursorPagination class MyPageNumberPagination(PageNumberPagination): page_size=2 #默认两个 page_size_query_param = ‘size‘ #传一个size参数 一页显示多少 http://127.0.0.1:8000/pager1/?page=1&size=3 max_page_size = 5 #一页显示最大5个 page_query_param = ‘page‘ #页码 class MyPagenumber2Pagination(LimitOffsetPagination): default_limit = 3 limit_query_param = ‘limit‘ #每页多少条数据 offset_query_param = ‘offset‘ #第几个索引开始 max_limit = 5 class MyPagenumber3Pagination(CursorPagination): cursor_query_param = ‘cursor‘ page_size = 2 ordering = ‘id‘ page_size_query_param = None max_page_size = None class Pager1View(APIView): def get(self,request, *args,**kwargs): #获取所有数据 roles = models.Role.objects.all() #创建分页对象 pg = MyPagenumber3Pagination() #在数据库中获取分页数据 pager_roles = pg.paginate_queryset(queryset=roles, request=request,view=self) print(pager_roles) #对分页数据进行序列化 ser = PagerSerialiser(instance=pager_roles, many=True) return pg.get_paginated_response(ser.data) #返回上一页或者下一页
原文：https://www.cnblogs.com/Liang-jc/p/9346651.html