Django REST Framework 过滤多个字段

Question

Models

class Task(Model):
    employee_owner = ForeignKey(Employee, on_delete=CASCADE)
    employee_doer = ForeignKey(Employee, on_delete=CASCADE)

Views

class TaskViewSet(ModelViewSet):
    serializer_class = TaskSerializer
    queryset = Task.objects.all()
    filter_class = TaskFilter

Filter

class TaskFilter(FilterSet):
    owner_id = NumberFilter(name='employee_owner__id')
    doer_id = NumberFilter(name='employee_doer__id')

    class Meta:
        model = Task
        fields = {
            'owner_id',
            'doer_id'
        }

Endpoints

http://localhost:8000/api/tasks?owner_id=1&doer_id=1

（仅分配 owner 和 doer 是同一员工的任务）

http://localhost:8000/api/tasks?owner_id=1

（仅分配 owner 是特定员工而 doer 是任何人的任务）

http://localhost:8000/api/tasks?doer_id=1

（仅分配 doer 是特定员工而 owner 是任何人的任务）

What I want

我想要这样的端点：

http://localhost:8000/api/tasks?both_id=1

（这会给我以上 3 个端点的所有结果）

我希望django-filter像这样进行过滤：

Task.objects.filter(
    Q(employee_owner__id=1) | Q(employee_doer__id=1)
)

我怎样才能做到这一点？谢谢。

Answer 1

您可以使用 method 参数自定义过滤器，如下所示：

class TaskFilter(FilterSet):
    owner_id = NumberFilter(name='employee_owner__id')
    doer_id = NumberFilter(name='employee_doer__id')
    both_id = NumberFilter(method='filter_both')

    class Meta:
        model = Task
        fields = {
            'owner_id',
            'doer_id',
            'both_id' 
        }

    def filter_both(self, queryset, name, value):
        return queryset.filter(
            Q(employee_owner__id=value) | Q(employee_doer__id=value)
        )

Answer 2

我个人建议使用 DjangoFilterBackend 进行过滤

from django_filters.rest_framework import DjangoFilterBackend

之后

class TaskViewSet(ModelViewSet):
    serializer_class = TaskSerializer
    queryset = Task.objects.all()
    filter_backends = (DjangoFilterBackend,)
    filterset_fields = ['owner_id', 'doer_id']# pass query through params

Django REST Framework 过滤多个字段

Django REST Framework filter multiple fields

python

django

django-filter

django-rest-framework