rest_framework-分页

分页

from django.shortcuts import render

# Create your views here.

from rest_framework import serializers
from rest_framework.views import APIView
from .models import *
from rest_framework.response import Response
from rest_framework.pagination import PageNumberPagination


class MySerializer(serializers.ModelSerializer):
    class Meta:
        model = Roles

        fields = '__all__'


class MyPagination(PageNumberPagination):
    page_size = 1
    page_query_param = 'page'
    page_size_query_param = 'page_size'
    max_page_size = 50


class MyView(APIView):

    def get(self, request, *args, **kwargs):
        queryset = Roles.objects.all()
        pagers = MyPagination()
        instance = pagers.paginate_queryset(queryset, request, self)
        serializer = MySerializer(instance=instance, many=True)
        return Response(serializer.data)

• PageNumberPagination：需要在rest-framework的setting配置：'PAGE_SIZE'
• 使用
  • 先实例化一个分页对象
  • 调用实例化对象的paginate_queryset方法，这个方法接受3个参数，查询的queryset对象，request，view
  • 序列化
  • 返回
• 自定义分页对象
  • 需继承PageNumberPagination
  • 设置默认的page_size
  • page_query_param: 设置该参数，可以从url的参数里面获取请求页数
  • page_size_query_param： 设置该参数，可以从url的参数里面获取请求页数大小
  • max_page_size： 设置该参数，限制一页请求的大小，防止恶意请求