Django Restframework:用于查询集统计摘要的视图? [英] Django Restframework: What view to use for statistical summary of queryset?

问题描述

Django Restframework为查询集的列表和单个模型提供通用视图.哪种视图类最适合创建提供查询集统计摘要的终结点?

Django Restframework provides generic views for lists and single models from querysets. Which view class would be most appropriate for creating an endpoint that serves a statistical summary of a queryset?

我当然可以从头开始构建APIView，但是我想重用ListAPIView上的大多数设置(例如get_queryset，permission_classes等)以及url参数.

I could surely build an APIView from scratch but I would like to reuse most of the settings on the ListAPIView (such as get_queryset, permission_classes, etc.) as well as url parameters.

端点的组织方式如下:

/api/data/           # data endpoint
/api/data/summary/   # summary endpoint

摘要端点将提供与单个模型实例无关的单个对象.

The summary endpoint will provide a single object that is not related to a single model instance.

感谢您提供最佳实践建议.

Thank you for any best practice advice.

推荐答案

现在，我提出了以下解决方案:

For now I came up with following solution:

# pseudo-code !    

class DataView(ListAPIView):
    """Returns a queryset as a serialized and paginated list.
    Set queryset, permissions, etc. here."""

    def get_queryset(self):
        # add complex lookup here
        queryset = self.queryset
        return queryset


class SummaryView(DataView):
    """Overwrite the get method to serve different 
    content, e.g. statistical summary."""

    def summarize(self, request, *args, **kwargs):
        """This can be moved to a Mixin class."""
        # make sure the filters of the parent class get applied
        queryset = self.filter_queryset(self.get_queryset())
        # do statistics here, e.g.
        stats = {'count': queryset.count()}
        # not using a serializer here since it is already a 
        # form of serialization
        return Response(stats)

    def get(self, request, *args, **kwargs):
        return self.summarize(request, *args, **kwargs)

这篇关于Django Restframework:用于查询集统计摘要的视图?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！