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  • 05 Django REST Framework 分页

     01-分页模式

    rest framework中提供了三种分页模式:
    
    from rest_framework.pagination import PageNumberPagination, LimitOffsetPagination, CursorPagination

    02-全局配置

    REST_FRAMEWORK = {
        'DEFAULT_PAGINATION_CLASS': 'rest_framework.pagination.LimitOffsetPagination',
        'PAGE_SIZE': 100
    }

    03-局部配置

    我们可以在视图类中进行局部设置

    class PublisherViewSet(ModelViewSet):
        queryset = models.Publisher.objects.all()
        serializer_class = PublisherModelSerializer
        pagination_class = PageNumberPagination  # 注意不是列表(只能有一个分页模式)

    04-内置分页器-PageNumberPagination

    按页码数分页,第n页,每页显示m条数据
    
    例如:http://127.0.0.1:8000/api/article/?page=2&size=1
    class MyPageNumber(PageNumberPagination):
        page_size = 2  # 每页显示多少条
        page_size_query_param = 'size'  # URL中每页显示条数的参数
        page_query_param = 'page'  # URL中页码的参数
        max_page_size = None  # 最大页码数限制

    4.1 视图

    class ArticleList(APIView):
        def get(self, request, *args, **kwargs):
            res = {"code": 0}
            article_list = models.Article.objects.all().order_by("id")
            # 分页
            page_obj = MyPageNumber()
            page_article = page_obj.paginate_queryset(queryset=article_list, request=request, view=self)
            ser_obj = ArticleSerializer(page_article, many=True)
            res["data"] = ser_obj.data
            return Response(res)

    4.2 返回带页码链接的响应

    class ArticleList(APIView):
        def get(self, request, *args, **kwargs):
            res = {"code": 0}
            article_list = models.Article.objects.all().order_by("id")
            # 分页
            page_obj = MyPageNumber()
            page_article = page_obj.paginate_queryset(queryset=article_list, request=request, view=self)
            ser_obj = ArticleSerializer(page_article, many=True)
            res["data"] = ser_obj.data
            return page_obj.get_paginated_response(res)

    05-LimitOffsetPagination 

    分页,在n位置,向后查看m条数据
    
    例如:http://127.0.0.1:8000/api/article/?offset=2&limit=2

    5.1 分页器

    # offset分页
    class MyLimitOffset(LimitOffsetPagination):
        default_limit = 1
        limit_query_param = 'limit'
        offset_query_param = 'offset'
        max_limit = 999

    5.2 视图

    class ArticleList(APIView):
        def get(self, request, *args, **kwargs):
            res = {"code": 0}
            article_list = models.Article.objects.all().order_by("id")
            # 分页
            page_obj = MyLimitOffset()
            page_article = page_obj.paginate_queryset(queryset=article_list, request=request, view=self)
            ser_obj = ArticleSerializer(page_article, many=True)
            res["data"] = ser_obj.data
            return page_obj.get_paginated_response(res)

    06-CursorPagination

    加密分页,把上一页和下一页的id值记住

     6.1 分页器

    # 加密分页
    class MyCursorPagination(CursorPagination):
        cursor_query_param = 'cursor'
        page_size = 1
        ordering = '-id'  # 重写要排序的字段

    6.2 视图

    class ArticleList(APIView):
        def get(self, request, *args, **kwargs):
            res = {"code": 0}
            article_list = models.Article.objects.all().order_by("id")
            # 分页
            page_obj = MyCursorPagination()
            page_article = page_obj.paginate_queryset(queryset=article_list, request=request, view=self)
            ser_obj = ArticleSerializer(page_article, many=True)
            res["data"] = ser_obj.data
            # return Response(res)
            return page_obj.get_paginated_response(res)
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  • 原文地址:https://www.cnblogs.com/pgxpython/p/10287876.html
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