AI-响应式、分页器

如果在setting配置下列，当只有BrowsableAPIRenderer时，只会返回浏览器页面；当配置成JSONRenderer，会返回json数据
REST_FRAMEWORK={
    ‘DEFAULT_RENDERER_CLASSES‘: (
        ‘rest_framework.renderers.JSONRenderer‘,
        ‘rest_framework.renderers.BrowsableAPIRenderer‘,
    ),
}

####分页
from rest_framework.pagination import PageNumberPagination
class MyPageNumberPagination(PageNumberPagination): #继承
    page_size = 3    #页码


from rest_framework.viewsets import ModelViewSet
class CustomerView(ModelViewSet): #将五个数据接口全部封装在了ModelViewSet
    queryset = Customer.objects.all()
    serializer_class = CustomerSerializer
    pagination_class = MyPageNumberPagination  #分页