Question

class MyFilter(django_filters.FilterSet):
    class Meta:
        model = MyModel
        fields = {
            'field': ['exact',  'isnull'],
        }

现在我如何过滤这个？field = 1＆amp; field__isnull = True ???

Answer 1

通过添加自定义字段解决了这个问题。

def filter_field_or_null(queryset, value):
    return queryset.filter(
        Q(field=value) | Q(field__isnull=True)
    )


class MyFilter(django_filters.FilterSet):
    field_or_null = django_filters.ModelChoiceFilter(
        queryset=SomeModel.objects.all(),
        action=filter_field_or_null
    )

    class Meta:
        model = MyModel

Answer 2

我很困惑，你的问题是如何执行OR查询，但是，你的例子是“＆amp;” （这通常意味着AND）如果你想制作OR条件，你可以使用Q对象

如：

Q(field=1) | Q(field__isnull=True)

请参阅https://docs.djangoproject.com/en/1.10/ref/models/querysets/#django.db.models.Q了解详情。

问候。

Answer 3

供参考使用Django Filter doc

可能是以下示例有用的

from django.db import models
import django_filters

class Mymodel(models.Model):
    field1 = models.CharField(max_length=255)
    field2 = models.IntegerField(null=True)


class MyFilter(django_filters.FilterSet):
    field1__iexact = django_filters.CharFilter(lookup_expr='iexact')
    field1__isnull = django_filters.CharFilter(lookup_expr='isnull')

    class Meta:
        model = Product
        fields = ['field1']

Answer 4

您可以使用django-filter 1.1.0查看Customize filtering with Filter.method，代码可以如下所示

    class MyFilter(django_filters.FilterSet):
        field = NumberFilter(method='field_exact_or_isnull_filter')

        class Meta:
            model = MyModel
            fields = [field]

        def field_exact_or_isnull_filter(self, queryset, name, value):
            return queryset.filter(
                Q(field=1) | Q(field=None)
            )

如何使用Django-Filter执行或查询

4 个答案: