python - 导入错误: cannot import name 'Affiliate' from partially initialized module 'affiliate.models' (most likely due to a circular import)

Question

我在 django 中遇到循环导入错误，并且似乎无法解决它。 这是我在affiliate(app)中的models.py

from member.models import Member

class SubAffiliate(models.Model):
    member_id = models.ForeignKey(Member, on_delete=models.CASCADE)

这是我在 member(app) 中的 models.py

from affiliate.models import Affiliate

class Member(models.Model):
    affiliates = models.ManyToManyField(Affiliate, blank=True, related_name="members_affiliate")

为了解决问题，我尝试像这样导入

import affiliate.models

然后像这样使用它

affiliate.models.Affiliate

然后我收到此错误 AttributeError: module 'affiliate' has no attribute 'models'

我应该怎么做才能解决这个错误。谢谢!

Answer 1

两个模型不能互相导入。如果您需要引用另一个模块的模型，您可以使用字符串文字:

# no import from member.models!

class SubAffiliate(models.Model):
    member = models.ForeignKey(
        <strong>'member.Member'</strong>,
        on_delete=models.CASCADE
    )

对于其他 models.py 文件，您还可以使用带有 app_name.ModelName 的字符串:

# no import from affiliate.models

class Member(models.Model):
    affiliates = models.ManyToManyField(
        <strong>'affiliate.Affiliate'</strong>,
        blank=True,
        related_name='members_affiliate'
    )