如何使用Django Rest过滤器限制查询结果 [英] How to limit query results with Django Rest filters
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.
http://www.django-rest-framework.org/api-guide/pagination/
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