Django REST 框架过滤多个字段

Question

模型

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

视图

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

滤波器

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'
        }

端点

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

(仅提供owner和doer是同一员工的任务(

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

(仅提供owner是特定员工且doer是任何人的任务(

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

(仅提供doer是特定员工而owner是任何人的任务(

我想要什么

我想要一个像这样的端点：

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

(这将为我提供上述 3 个端点的所有结果(

我希望django-filter完全像这样进行过滤：

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

然后

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