python - 迭代 Django 中的相关对象

Question

我有这些模型:

class Person(models.Model):
   name=models.CharField(max_length=100)
   family=models.CharField(max_length=100)

class MailContact(models.Model):
   person=models.ForeignKey(Person)
   email=models.CharField(max_length=100)
   #some fields

class Participant(models.Model):
   person=models.ForeignKey(Person)
   #some fields

在 views.py 中:

   emails = []
   for participant in participants:
      for contact in participant__person__mailContact_set:
         emails.append(contact.email)
   send_mail(email_subject,email_body,'receiver_email_address@gmail.com',emails,fail_silently=False)

我以多种方式更改了此代码，但我反复收到此错误:

global name 'participant__person__mailContact_set' is not defined

有什么建议吗？

Answer 1

for contact in participant.person.mailcontact_set.all():