[英]AttributeError: 'Price' object has no attribute 'update'
我收到一个错误,AttributeError: 'Price' object has no attribute 'update' .I 写道
fourrows_transpose=list(map(list, zip(*fourrows)))
val3 = sheet3.cell_value(rowx=0, colx=9)
user3 = Companyransaction.objects.filter(corporation_id=val3).first()
if user3:
area = Area.objects.filter(name="America").first()
pref = Prefecture.objects.create(name="Prefecture", area=area)
city = City.objects.create(name="City", prefecture=pref)
price= Price.objects.create(city=city)
pref.name = fourrows_transpose[0][0]
pref.save()
for transpose in fourrows_transpose[2:]:
if len(transpose) == 5:
if "×" in transpose or "○" in transpose:
city.name = "NY"
city.save()
price.update(upper1000="○",from500to1000="○",under500="○")
在models.py我写
class Area(models.Model):
name = models.CharField(max_length=20, verbose_name='area', null=True)
class User(models.Model):
user_id = models.CharField(max_length=200,null=True)
area = models.ForeignKey('Area',null=True, blank=True)
class Prefecture(models.Model):
name = models.CharField(max_length=20, verbose_name='prefecture')
area = models.ForeignKey('Area', null=True, blank=True)
class City(models.Model):
name = models.CharField(max_length=20, verbose_name='city')
prefecture = models.ForeignKey('Prefecture', null=True, blank=True)
class Price(models.Model):
upper1000 = models.CharField(max_length=20, verbose_name='u1000', null=True)
from500to1000 = models.CharField(max_length=20, verbose_name='500~1000', null=True)
under500 = models.CharField(max_length=20, verbose_name='d500', null=True)
city = models.ForeignKey('City', null=True, blank=True)
我想把“○”放在价格模型的upper1000&from500to1000&under500列,但由于错误而无法完成。我的代码有什么问题?我该如何解决这个问题?
.update
是查询集上的一种方法,而不是模型。 如果您想更新一组共享某些查询条件的记录,它会很有用。
更新您已有的对象的正常方法是设置其属性,然后保存它。
price.upper1000 = "○"
price.from500to1000 = "○"
price.under500 = "○"
price.save()
django 模型实例has no attribute 'update'
, update
是 django objects Manager 类的方法,如果你想更新单个实例,你可以尝试:
Price.objects.filter(pk=price.pk).update(
upper1000="○",
from500to1000="○",
under500="○"
)
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