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  1. class Company (models.Model):
  2. ....
  3. def project_insurance_valid(self, project_pk):
  4. insurance_set = self.insurance_set.filter(project=project_pk)
  5. expire_within_30_days = False
  6. ​
  7. for insurance in insurance_set:
  8. if insurance.expired:
  9. return False
  10. ​
  11. if insurance.expire_within_30_days:
  12. expire_within_30_days = True
  13. ​
  14. if expire_within_30_days:
  15. return "expires within 30 days"
  16. else:
  17. return True
  18. ​
  19. class Insurance(models.Model):
  20. ​
  21. project = models.ForeignKey(Project,
  22. on_delete=models.CASCADE,
  23. null= False,
  24. blank= False)
  25. company = models.ForeignKey(Company,
  26. on_delete=models.CASCADE,
  27. null=False,
  28. blank=False)
  29. ​
  30. @property
  31. def expired(self):
  32. return self.expiry_date < date.today()
  33. ​
  34. @property
  35. def expire_within_30_days(self):
  36. today = date.today()
  37. date_30_days = today + timedelta(days=30)
  38. return today <= self.expiry_date <= date_30_days

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