Question

model.py
class Device(models.Model):
    uuid = models.CharField(max_length=100)
    major = models.CharField(max_length=10)
    minor = models.CharField(max_length=10)

resource.py
class DeviceResourceV3(ModelResource):
    '''Fetch device details'''
    class Meta:
        queryset = Device.objects.all()
        resource_name = 'device'
        always_return_data = True
        filtering = {
            'uuid': ['exact', 'in'],
            'id': ['exact']
    }

请求的API调用：

/api/device?uuidmm__in=XXXXXX,YYYYY

现在根据要求，我们必须创建一个过滤器，该过滤器将导致[XXXXXX，YYYYY]中的所有设备（uuid + major + minor）

我已经通过了
中提到的提前过滤器了 http://django-tastypie.readthedocs.org/en/latest/resources.html和
Django Tastypie Advanced Filtering: How to do complex lookups with Q objects

但这个特定用例变得过于复杂。任何人都可以为此查询或任何其他简单方法建议适当的build_filters和apply_filters方法。

Answer 1

我会尝试使用注释：

class DeviceResourceV3(ModelResource):
    uuidmm = fields.CharField(max_length=120)


    class Meta:
        queryset = Device.objects.all().annotate(uuidmm=(Concat('uuid', 'major', 'minor'))),
        resource_name = 'device'
        always_return_data = True
        filtering = {
            'uuid': ['exact', 'in'],
            'id': ['exact'],
            'uuidmm': ['exact', 'in']
    }

如果＆＃34; __ in＆＃34;我现在无法测试它。会采用这种方法。如果没有，您还可以覆盖apply_filters：

def apply_filters(self, request, applicable_filters):
    semi_filtered = super(DeviceResourceV3, self).apply_filters(request, applicable_filters)

    uuidmms = request.GET.get('uuidmm__in', None)

    if uuidmms:
        # handle your filtering here, e.g. by combining all uuidmms to one string and check, and exclude the ones that are not in the combined string

Tastypie：具有复杂查询的高级过滤器

1 个答案: