Django Meta.fields包含一个非';t在此过滤器集上定义:****
我正在使用Django过滤器包 我在视图中按照以下方式定义过滤器Django Meta.fields包含一个非';t在此过滤器集上定义:****,django,django-models,django-filter,Django,Django Models,Django Filter,我正在使用Django过滤器包 我在视图中按照以下方式定义过滤器 class UnitFilter(django_filters.FilterSet): class Meta: model = Unit fields = [ 'floor', 'number', 'building','lease','leaseterm', 'lease__is_active','lease__is_terminated'
class UnitFilter(django_filters.FilterSet):
class Meta:
model = Unit
fields = [
'floor', 'number', 'building','lease','leaseterm',
'lease__is_active','lease__is_terminated','lease__is_renewed',]
我的筛选所依据的单元模型
class Unit(CommonInfo):
version = IntegerVersionField( )
number = models.CharField(max_length=30,null=True, blank=True)
max_occupants = models.PositiveSmallIntegerField()
floor = models.PositiveSmallIntegerField()
rooms = models.PositiveSmallIntegerField()
is_disabled_access = models.BooleanField(default=False)
balcony_quantity = models.PositiveSmallIntegerField()
building = models.ForeignKey(Building)
recomended_price = models.DecimalField(max_digits=7, decimal_places=2)
_lease = None
_leaseterm = None
#check = models.ManyToManyField(UnitCheck, through='UnitChecklist')
def _get_total(self):
from conditions.models import LeaseTerm
from lease.models import Lease
lease_dict = Lease.objects.filter(unit_id=self.id, is_active = True , is_terminated = False).aggregate(Max('id'))
if lease_dict['id__max']:
lease = lease_dict['id__max']
else:
lease = 0
leaseterm_dict = LeaseTerm.objects.filter(lease_id=lease, is_active = True , is_terminated = False).aggregate(Max('id'))
if leaseterm_dict['id__max']:
leaseterm = leaseterm_dict['id__max']
else:
leaseterm = 0
self._lease = lease
self._leaseterm = leaseterm
@property
def lease(self):
if self._lease is None:
self._get_total()
return self._lease
@property
def leaseterm(self):
if self._leaseterm is None:
self._get_total()
return self._leaseterm
此模型中有2个计算属性
租赁和租赁人
当leaseterm给我这个错误时,租赁财产没有问题
Meta.fields包含未在此筛选器集上定义的字段:
至少
为什么??这是django filter中的一个bug?有什么解决方法吗?请参阅以获得良好的解释
当您执行queryset.filter(field\u name=field\u value)
时,Django将其转换为SQL查询。不幸的是,计算属性只存在于Python对象上,因此不能按它们进行过滤
解决方法是,无论何时按其中一个进行筛选,都要在queryset中包含注释,以便在SQL中添加适当的字段。这个链接有一个很好的例子来说明如何做到这一点。这比用Python做要难,但这是唯一真正可行的方法