7. 分页

作者: lkning | 来源:发表于2018-01-24 19:19 被阅读0次

    a. 根据页码进行分页

    • urls.py
    from django.conf.urls import url, include
    from rest_framework import routers
    from web.views import s9_pagination
    
    urlpatterns = [
        url(r'^test/', s9_pagination.UserViewSet.as_view()),
    ]
    
    • views.py
    #!/usr/bin/env python
    # -*- coding:utf-8 -*-
    from rest_framework.views import APIView
    from rest_framework import serializers
    from .. import models
    
    from rest_framework.pagination import PageNumberPagination
    
    
    class StandardResultsSetPagination(PageNumberPagination):
        # 默认每页显示的数据条数
        page_size = 1
        # 获取URL参数中设置的每页显示数据条数
        page_size_query_param = 'page_size'
    
        # 获取URL参数中传入的页码key
        page_query_param = 'page'
    
        # 最大支持的每页显示的数据条数
        max_page_size = 1
    
    
    class UserSerializer(serializers.ModelSerializer):
        class Meta:
            model = models.UserInfo
            fields = "__all__"
    
    
    class UserViewSet(APIView):
        def get(self, request, *args, **kwargs):
            user_list = models.UserInfo.objects.all().order_by('-id')
    
            # 实例化分页对象,获取数据库中的分页数据
            paginator = StandardResultsSetPagination()
            page_user_list = paginator.paginate_queryset(user_list, self.request, view=self)
    
            # 序列化对象
            serializer = UserSerializer(page_user_list, many=True)
    
            # 生成分页和数据
            response = paginator.get_paginated_response(serializer.data)
            return response
    

    b. 位置和个数进行分页

    • urls.py
    from django.conf.urls import url, include
    from web.views import s9_pagination
    
    urlpatterns = [
        url(r'^test/', s9_pagination.UserViewSet.as_view()),
    ]
    
    • views.py
    #!/usr/bin/env python
    # -*- coding:utf-8 -*-
    from rest_framework.views import APIView
    from rest_framework import serializers
    from .. import models
    
    from rest_framework.pagination import PageNumberPagination,LimitOffsetPagination
    
    
    class StandardResultsSetPagination(LimitOffsetPagination):
        # 默认每页显示的数据条数
        default_limit = 10
        # URL中传入的显示数据条数的参数
        limit_query_param = 'limit'
        # URL中传入的数据位置的参数
        offset_query_param = 'offset'
        # 最大每页显得条数
        max_limit = None
    
    class UserSerializer(serializers.ModelSerializer):
        class Meta:
            model = models.UserInfo
            fields = "__all__"
    
    
    class UserViewSet(APIView):
        def get(self, request, *args, **kwargs):
            user_list = models.UserInfo.objects.all().order_by('-id')
    
            # 实例化分页对象,获取数据库中的分页数据
            paginator = StandardResultsSetPagination()
            page_user_list = paginator.paginate_queryset(user_list, self.request, view=self)
    
            # 序列化对象
            serializer = UserSerializer(page_user_list, many=True)
    
            # 生成分页和数据
            response = paginator.get_paginated_response(serializer.data)
            return response
    

    c. 游标分页

    • urls.py
    from django.conf.urls import url, include
    from web.views import s9_pagination
    
    urlpatterns = [
        url(r'^test/', s9_pagination.UserViewSet.as_view()),
    ]
    
    • views.py
    #!/usr/bin/env python
    # -*- coding:utf-8 -*-
    from rest_framework.views import APIView
    from rest_framework import serializers
    from .. import models
    
    from rest_framework.pagination import PageNumberPagination, LimitOffsetPagination, CursorPagination
    
    
    class StandardResultsSetPagination(CursorPagination):
        # URL传入的游标参数
        cursor_query_param = 'cursor'
        # 默认每页显示的数据条数
        page_size = 2
        # URL传入的每页显示条数的参数
        page_size_query_param = 'page_size'
        # 每页显示数据最大条数
        max_page_size = 1000
    
        # 根据ID从大到小排列
        ordering = "id"
    
    
    
    class UserSerializer(serializers.ModelSerializer):
        class Meta:
            model = models.UserInfo
            fields = "__all__"
    
    
    class UserViewSet(APIView):
        def get(self, request, *args, **kwargs):
            user_list = models.UserInfo.objects.all().order_by('-id')
    
            # 实例化分页对象,获取数据库中的分页数据
            paginator = StandardResultsSetPagination()
            page_user_list = paginator.paginate_queryset(user_list, self.request, view=self)
    
            # 序列化对象
            serializer = UserSerializer(page_user_list, many=True)
    
            # 生成分页和数据
            response = paginator.get_paginated_response(serializer.data)
            return response
    

    相关文章

      网友评论

          本文标题:7. 分页

          本文链接:https://www.haomeiwen.com/subject/eytyaxtx.html