Django-filter 按相关字段过滤

Question

我有两张 table 。

class Writer(models.Model)
    name = model.CharField()
    ...

class Article(models.Model)
    name = model.CharField()
    writer = model.ForeignKey('Writer', related_name="relationship") 
    ...

我想构建一些获取作者列表的 API 端点，但这应该可以通过文章 id 进行过滤。我正在使用 django-filter。所以:

class WriterViewSet(viewsets.ReadOnlyModelViewSet):
   filter_backend = [filters.djangoFilterBackend],
   filter_class = WriterFilter


class WriteFilter(django_filters.rest_framework.FilterSet):
....

所以我关心的是，如何定义 WriteFilter 来按文章过滤 Writer？

Answer 1

class WriteFilter(django_filters.rest_framework.FilterSet):
    article = django_filters.CharFilter(name='relationship__name', lookup_expr='contains')

    class Meta:
        model = WriterFilter
        fields = ['article']

你的网址将是这样的，
/api/wtiter/list/?article=somearticlename

<小时/>

更新1

自 django-filter 2.0 起，name 参数更改为 field_name.

因此过滤器类将是，

class WriteFilter(django_filters.rest_framework.FilterSet):
    article = django_filters.CharFilter(<b>field_name</b>='relationship__name', lookup_expr='contains')

    class Meta:
        model = WriterFilter
        fields = ['article']