如何使用Django Rest过滤器限制查询结果

本文介绍了如何使用Django Rest过滤器限制查询结果的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我正在使用 Django Rest Framework 编写的api。我已经定义了几个模型类，我还创建了一些过滤器来应用于在指定的 api-endpoints 。

I am working on an api built with Django Rest Framework. I have defined several model classes and I have also created some filters to apply on certain queries that happen in the specified api-endpoints.

我试图在 queryset 中申请LIMIT，但我宁愿不要使用Django表示法 Entry.objects.all（）[：5] 。相反，我希望能够从与模型相关联的过滤器中应用限制。

I am trying to apply LIMIT in the queryset but I would prefer to not use the Django notation e.x. Entry.objects.all()[:5]. Instead I would like to be able to apply the limit from inside the filter associated with the model.

到目前为止，我还没有找到任何解决方案。我想我应该找到一种方法来定义具有默认值的过滤器，这将导致不限制查询器，并且如果请求到达端点并包含类似于？filter = 10 那么查询器应该被限制在前10个。

Until now I haven't find any solution. I am thinking that I should find a way to define a filter with default value something that would result in not limiting the queryset and if a request reaches the endpoint and contains something like ?filter=10 then the queryset should be limited to the first 10.

推荐答案

可以使用Django Rest Framework分页。 pagination_class LimitOffsetPagination 使您能够限制query_param中返回的条目数。

You can use Django Rest Framework pagination. The pagination_class LimitOffsetPagination give you the ability to limit the number of returned entries in a query_param.

www.django-rest-framework/api-guide/pagination/