Python 模型中的django循环导入

我知道这里有一个循环导入，但其中一个用于定义一些外键字段，另一个仅用于另一个模型中的属性

型号：

收据/型号.py

from django.db import models
from employees.models import Employee

class Receipt(models.Model):
    Supervisor = models.ForeignKey(Employee, on_delete=models.CASCADE, related_name='receipt_supervisor')
    Employee = models.ForeignKey(Employee, on_delete=models.CASCADE, related_name='receipt_employee')
    amount = models.DecimalField(max_digits=6, decimal_places=2)

from django.db import models
from receipts.models import Receipt

class Employee(models.Model):
    number = models.CharField(max_length=50, unique=True)
    first_name = models.CharField(max_length=255)
    last_name = models.CharField(max_length=255)

    @property
    def receipt_sum(self):
        receipts = Receipt.objects.filter(Employee=self.pk)
        sum = 0
        for receipt in receipts:
            sum += receipt.amount
        return sum

employees/models.py

from django.db import models
from employees.models import Employee

class Receipt(models.Model):
    Supervisor = models.ForeignKey(Employee, on_delete=models.CASCADE, related_name='receipt_supervisor')
    Employee = models.ForeignKey(Employee, on_delete=models.CASCADE, related_name='receipt_employee')
    amount = models.DecimalField(max_digits=6, decimal_places=2)

from django.db import models
from receipts.models import Receipt

class Employee(models.Model):
    number = models.CharField(max_length=50, unique=True)
    first_name = models.CharField(max_length=255)
    last_name = models.CharField(max_length=255)

    @property
    def receipt_sum(self):
        receipts = Receipt.objects.filter(Employee=self.pk)
        sum = 0
        for receipt in receipts:
            sum += receipt.amount
        return sum

我得到这个错误：

无法从部分初始化的模块“employees.models”导入名称“Employee”（很可能是由于循环导入）

是否有办法绕过此问题，以便在Employee属性中执行收据查询？或者我需要在其他地方进行计算

谢谢

是否有办法绕过此问题，以便我可以在

Employee

属性中执行收据查询

是，您可以通过以下方法导入模块：

from django.db import models

class Employee(models.Model):
    number = models.CharField(max_length=50, unique=True)
    first_name = models.CharField(max_length=255)
    last_name = models.CharField(max_length=255)

    @property
    def receipt_sum(self):
        from receipts.models import Receipt
        receipts = Receipt.objects.filter(Employee=self.pk)
        sum = 0
        for receipt in receipts:
            sum += receipt.amount
        return sum

---

尝试在employee.models.py的

def Receipt_sum（self）

中导入

Receipt

，类似于

def Receipt_sum（self）：from receipts.models导入收据

…嗨，Daniel，您尝试过在此处搜索类似问题吗？看看这个答案，我相信它回答了你的问题：哦！好极了！导入到属性中是一种方法。我有一些额外的数学和过滤，我认为这会混淆问题，但给你额外的分数，先生！我刚刚意识到这个关系可以应用filter方法

receives=self.receipt\u employee.filter（is_deleted=False，created_at_uyear=datetime.now（）.year）

，这才是我真正想要的！再次感谢@WillemVanOnsem